Rainwater Harvesting Systems - Speidel Tank

Rainwater Harvesting Systems 

Rainwater Harvesting 

Retention · Infiltration · Drinking water · Wastewater 

Largest range of tanks 

for optimal solutions! 

International 

2011 

Valid from January 2011

Quality and Expertise 

Production 

We have been manufacturing containers and technical components from polyethylene for rainwater usage, the 

agricultural sector and municipal enterprises by means of rotation process for decades. We use stainless steel to make 

tanks and containers for the production and storage of wine and beverages – all at our Ofterdingen location - made in 

Germany. 

Container Construction 

The construction of containers for water, wastewater, the industrial sector, beverages etc. has become second nature 

to us, and the experience gained from this enables us to know precisely what really matters when it comes to 

customer-orientated solutions for rainwater systems. 

Tradition and Progress 

We are a medium-sized family enterprise with around 90 employees. Our business started with the production of 

wooden vats and progressed to working with new materials and new production processes. We offer innovative 

products for traditional areas – from a third generation. For this reason we feel an equal sense of loyalty to this 

tradition and to technical progress for the future as well. 

Sustainability 

Our products are designed for long-term use. Not least because our solution to rainwater usage serves to preserve our 

valuable drinking water. 

2 

GUARANTEE YEARS 

Guarantee clause: 

The guarantee mentioned above only applies 

to underground rainwater storage tanks and 

not to individual components and accessories, 

even where these are included in the package 

price. Within the guarantee period, we replace 

materials at no cost or perform expert repairs 

at our discretion – all other services over and 

above this are excluded. 

The prerequisite for the provision of services 

under guarantee is proper handling, assembly 

and installation according to installation 

instructions. 

You can also find installation instructions at 

www.speidel-regenwasser.de

Why use Rainwater? 

To ensure that 

these images are 

a thing of the 

past. 

To ensure that our 

environment stays 

intact in the long 

To reduce our 

financial load. 

To ensure that the 

climatic change does 

not bring this 

scenario with it. 

To make us feel good. 

To ease your wallet and to contribute your 

part to saving the environment, configure 

your system as required at 

www.speidel-regenwasser.de 

3

Approx. 130 litres 

drinking water are consumed 

per person per day. 

67 litres of this volume 

can easily be replaced by 

rainwater. In a 4-person 

household this corresponds 

to more than 90,000 

litres drinking water per 

year. A definite ad-vantage 

for our environment. 

Drinking and 

cooking 

Body care 

Dish 

washing 

Toilet 

flushing 

Washing 

Car 

washing 

Garden 

watering* 

drinking 

water 

4 

6 

49 

8 

40 

17 

5 

5 

Can be replaced 

by rainwater 

40 

17 

5 

5 

How large must my 

rainwater usage system be? 

Calculation example 1 

for a 3-person household with a garden area 

of 150 m² requiring intensive watering 

3 persons, 1000 l each 

+ 150 m² watering area 

= Total requirement 

Outline of roof area required 20m²/1000 l 

= 4000 l x 20m² = 80m² (minimum area) 

1000 l 

The values indicated are benchmarks and 

are based on precipitation of 800 l/m². 

For an exact determination of the correct tank size 

for you, contact us at +49(0)7473 9462-0. 

*stat. average of all households in Germany, 

Including those without garden. 

Rule 1 

A tank volume of approx. 1000 litres per person 

is required for domestic water use. 

Rule 2 

A tank volume of approx. 1000 litres is used 

for intensive watering of an area of 150 m². 

Rule 3 

To determine the required roof area: approx. 20-25 m² 

roof area should be available per 1000 litres tank volume. 

- 3000 l 

- 1000 l 

- 4000 l 

Calculation example 2 

For a 6-person household with a garden area 

of 225 m² requiring intensive watering 

6 persons, 1000 l each 

+ 225 m² watering area 

= Total requirement 

- 6000 l 

- 1500 l 

- 7500 l 

Outline of roof area required 20m²/1000 l 

= 7500 l x 20m² = 150m² (minimum area) 

1000 l 

50% 

saving

Complete Set 

Garden Eco 

+ 

+ 

... easy and 

cost-effective! 

Consisting of: 

Underground 

rainwater storage tank 

with lid that is safe to walk on 

Basket filter 

DIVERTRON garden pump 

with automatic switching 

Garden tapping set, 12.5 m 

You can find recommended accessories such as 

an overflow syphon and rodent barrier on 

pages 16 and 21 

Set with underground 


Volume 

in litres 

2,000 

3,000 

4,000 

5,000 

7,500 

10,000 

ECO 

Order no 

Eco set 

08306 

08307 

08308 

08309 

08310 

08340 

5

6 

Complete Set 

Garden Standard 

+ 

+ 

? 

Cost-effective 

Garden Solution! 

? Underground rainwater 

storage tank 


? Dome basket filter 

? Gentle infeed 

? DIVERTRON garden pump 



You can find recommended accessories such as 

an overflow syphon and rodent barrier 

on pages 16 and 21 



STANDARD 

Volume 

in litres 

2,000 

3,000 

4,000 

5,000 

7,500 

10,000 


Order no. 

Standard set 

08273 

08274 

08275 

08276 

08277 

08341

»» 

Zum Kanal 

Complete Set 

Garden Comfort 

+ 

+ 

2,000 

3,000 

4,000 

5,000 

7,500 

10,000 

Convenient 

Garden Solution! 

Underground rainwater 

storage tank 


Filter syphon module 

Gentle infeed 




To sewer system 

You can find recommended accessories 

such as filter with backwash device on page 17 



COMFORT 

Volume 

in litres 


Order no. 

Premium set 

08278 

08279 

08280 

08281 

08282 

08342 

7

8 

Complete Set 

House and Garden 

Standard 

+ 

+ 

3,000 

4,000 

5,000 

7,500 

10,000 

Complete service 

Water system! 


storage tank 


Dome shaft 

Dome basket filter 

Gentle infeed 

Overflow syphon 

Rodent barrier 

House tapping set, 15 m 

with wall duct and 

floating suction filter 

BFK eco domestic water 

supply pump 


on page 21 



STANDARD 

Volume 

in litres 

Order no. 

Standard set 

08283 

08284 

08285 

08291 

08343 

+ + + 

Consisting of:

Complete Set 


Comfort 

+ 

+ 

3,000 

4,000 

5,000 

7,500 

10,000 

+ + + 

Complete service 

Water system! 


storage tank 


Dome shaft 


Gentle infeed 

House feed set, 15 m 



Filter with backwash device 

BFK domestic water 

supply pump 

Labelling set 

Lifting device 



COMFORT 

Volume 

in litres 


Order no. 

Premium set 

08292 

08293 

08294 

08295 

08344 

9

10 

Complete Set 


Standard - drivable 

+ 

+ 



STANDARD 

Volume 

in litres 

3,000 

4,000 

5,000 

7,500 

10,000 


Order no. 

Standard set 

08311 

08312 

08313 

08314 

08360 

+ + + 


storage tank 


Dome shaft, 

can be driven on 

Rain filter RF 2 

Gentle infeed 






BFK eco domestic water 

supply pump 


on page 21 

Car 

drivable

Complete Set 


Comfort – drivable 

+ 

+ 

+ 

+ 

3,000 

4,000 

5,000 

7,500 

10,000 


storage tank 


Dome shaft, 

can be driven on 


Gentle infeed 




Filter with backwash device 

BFK domestic water 

supply pump 

Labelling set 




COMFORT 

Volume 

in litres 


Order no. 

Standard set 

08315 

08316 

08317 

08318 

08361 

+ 

Car 

drivable 

11

Quality and Function 

Height-adjustable dome shaft with 

step all round for easy descent and 

access to filter. 

See page 15 

Filter syphon module Self-cleaning 

filter with syphon as odour lock - 

compact shape for optimal 

function. 

See page 16 

Tank overflow and filter overflow in 

one. No more joining of two overflows 

outside of the tank necessary. 

Feet with flat surface for connecting 

two or more underground storage 

tanks for maximum storage volume. 

See page 14 

Gentle infeed reservoir prevents the 

sediment layer from being agitated 

by incoming flow of water. 

Improves water quality through 

oxygenation and mixing. 

See page 16 

Carrying handles on all sides for 

convenient transporting and 

handling of of tank by 4 persons in 

garden. 

12 

Cleaning stage 1 

Self-cleaning filter 


Extraction of suspension substances 


Gentle infeed 

Empty conduit for tapping line, 

feeder, electrics, sensors, filter, 

backwash pipe and much more. 


Floating suction

Thick walls 

like no other… 

Double-walled PE lid that is safe 

to walk on, with stainless steel 

child safety lock and protection 

against frost, thanks to insulation. 

See page 14 

Large dome shaft and large 

600x800 mm tank opening for easy 

descent into tank. The oval opening 

allows access to the tank itself even 

where a filter is installed. 

See page 14 

DN 100 inlet pipe for connection to 

down pipe or to interconnected 

external filter. 

Second empty conduit option for 

additional conduits or for conduit 

routing in opposite direction. 

Crane eye for convenient lowering of 

tank into pit. 

Tank made from black, food-safe, 

indestructible PE with sturdy, 

fully-formed reinforcing ribs for 

maximum stability. 

See page 14 

Floating suction withdrawal with 

coarse filter and check valve. 

Tapping of water occurs below the 

water surface. An additional filter 

prevents coarse substances from being 

suctioned, and consequently blocking 

of the conduits. 

See page 16 

Speidel Quality 

The top-quality Speidel tanks produced in Germany 

boasta number of advantages over those from 

competitors 

Thick-walled due to high material content, and sturdy, fully-formed 

ribs for maximum stability 

Oval manhole dome; descent into tank possible despite built-in 

tank technology 

Insulation against frost thanks to double-walled lid with stainless 

steel child safety lock – included in all tanks at no extra charge 

Four sturdy carrying handles plus existing crane eye for easy 

transport (by hand) 

Material used is made from food-safe, pure grade polyethylene 

with KTW test certificate 

Solid feet for stable positioning during installation and storage, 

with level surfaces for tank extension 

Four integrated gland seals for maximum flexibility in terms 

of connection 

Tank can also be used in case of max. ground water level and 

formation water by means of "ground water module" extension 

All tanks in the RTMO range are capable of being driven on by car 

Compare for 

yourself ! 

13

*with dome shaft 

capable of being 

driven over 

14 

Car 

drivable 

3000 litres 

RTMO Underground 

Rainwater Storage Tanks 

Made from black, food-safe PE plastic (recyclable), thick-walled and extremely dimensionally stable. 

Sturdy reinforcing ribs, 4 carrying handles and two crane eyes for transporting and installation. 

The tank is completely leak-proof as it has been manufactured from one piece and does not feature a 

welded seam. Large, oval manhole dome (800x600 mm) for easy descent and filter installation. 

Descent into the tank possible even where technology package has been installed. Tank including 

screwable, double-walled insulated green tank lid with stainless steel child safety lock. 

In dome neck: 

Top: 

Underside: 

All round: 

NOTE: 

4000 litres 

Vol. 

(l) 

2000 

3000 

4000 

5000 

7500 

10000 

Width 

mm 

1260 

1460 

1690 

1910 

2200 

2450 

For use as drinking water storage tank or wastewater tank; see page 22 for accessories 

You can find our flat tank on page 24 

5000 litres 

Can also be used as Drainless collecting pit 

DN 100 intake and overflow bores with gland seal and underground 

wastewater pipe end cap 

Two DN 100 empty conduit bores with gland seal and underground wastewater pipe 

end cap on front end 

Two crane eyes for lowering tank into pit 

Feet and flat surfaces for joining multiple tanks for DN 50 connection or DN 100 

connection in case of 10,000 litre tank 

Four carrying handles for easy transport and handling of tank… 

Our tank prices include double-walled lid that is safe to walk on. 

COMPARE FOR YOURSELF! 

Length 

mm 

2150 

2450 

2450 

2450 

2790 

3000 

Height 

mm 

1590 

1785 

2010 

2230 

2500 

2540 

7500 litres 

Rainwater retention storage tank 

Ground water tank 

(in conjunction with ground water module) 

Drinking water tank 

(take note of official regulations) 

Weight 

kg 

112 

158 

208 

258 

390 

500 

Order no. 

08200 

08201 

08202 

08203 

08204 

08330 

10,000 litres

Tank Accessoires 

Domschacht Dome shaft - height-adjustable 

For frost-protected ground installation 800 to 1000 

mm height above ground 

Made from black PE plastic (200 mm adjustable) 

(without lid) with all round step 

Adjustment ring h = 150 mm (oval) 

Suitable for dome shaft and RTMO tank dome 

Dome shaft, round, can be driven 

on with wheel load up to 600 kg* 

With lid and plate oval/roundIncl. child safety lock 

Stepless height above ground of 950mm to 1300 mm 

above tank top 

(350 mm adjustable) opening Ø 600 mm 

Fastening set for oval lidConsisting of 

stainless steel fastening bar and lock, including two 

M10 bolts 

Connection set 

DN 50For connection of 2 underwater rainwater 

storage tanks, straight screw joint incl. 4 m spiral pipe 

* Recommended filter technology: filter syphon module and rain filter; see page 16 

Round dome shaft not suitable for dome basket filter! 

Coupling example: 30,000 litres 

Ground Water Module 

For use with ground water and formation water 

Ground water module 

Consisting of two ground water valves with biological 

and mechanical filter incl. pilot drill bit 

Order no. 

08220 

08237 

08235 

08213 

08179 

Order no. 

08232 

* Ground water module only available in conjunction with Speidel 

underground storage tank DBGM protected No. 20 2005 016 515.8 

Only 

available from us - 

proven reliability! 

This revolutionary solution offers reliable ground water protection for all water levels. All underground storage tanks from 

Speidel can be used in ground water with this newly developed product. 

The automatic water level control in the tank ensures that no pressure is exercised on the container from the outside in ground 

water conditions, which means that the tank can be used at any ground water level. 

Compared to conventional systems, which require great expenditure for concrete foundation plates or flat, thick-walled tanks, 

the ground water module* can be easily and quickly installed in all Speidel underground storage tanks (installation instructions 

can be found at www.speidel-behaelter.de) 

15

Fully automatic 

backwash 

possible 

16 

Filter / Tank Technology 


For installation in tank, consisting of: 

3P cartridge filter PF 

3P overflow syphon duo 

Rainwater filter for roof areas up to 150 m², 

high level of efficiency. 

Stainless steel sieve cartridge with plastic 

sheathing. 

Filter can be retrofitted with 3P backwash device. 

Ready-to-plug-in delivery. 

Dome basket filter 

As an alternative to filter syphon module, 

for installation in tank dome. Consisting of: 

Housing, filter basket, removal hook. 

100% water yield, low maintenance. 

For roof areas of up to 150 m² 

Basket filter Ø 400 mm 

Suspending type, 

including stainless steel snap hook 

Gentle infeed 

Underground wastewater pipe DN 100 for 

attachingto filter outlet, variable heights by means 

of telescopic adjustment, PE inlet reservoir at 

bottom for 

for tank 2,000 litres, 3,000 litres 

for tank 4,000 litres up to 10,000 litres 

Floating suction filter 

For withdrawal of rainwater and connection option 

to PE pipes DN32 mm. 

With floating ball Ø 15 cm and filter basket 

Mesh size 1.2 mm, check valve 1", hose barb, 

connection joint for 1" PE pipesand 2 m suction 

pipe. 


PE syphon for attaching to internal overflow 

connection nozzle. 

As odour block andfor extraction of suspension 

substances. 

Order no. 

08250 

08230 

08233 

08191 

08192 

08305 

08125 

The rainwater is conveyed into the cartridge. 

The filter cartridge purifies the rainwater. 

The purified water is conveyed into the 

rainwater storage tank via the gentle infeed. 

The oblique position and the smooth surface 

structure of the sieve ensure that the filtered 

dirt is conveyed into the sewer system.

3P volume filter 

with telescope extension 

For installation in front of tankInlet connection nozzle 

Dirty water outlet nozzle 

Outlet connection nozzle 

For underground wastewater pipe joint DN 100 in 

each case 

Telescope shaft for installation depth 350-650 mm 

With lid that is safe for walking on, lockable 


Rain filter RF1 

For installation in front of tank 

Inlet and outlet connection nozzles 

Overflow outlet nozzle 

For underground wastewater pipe joint DN 100 

in each case 

With filter basket and green lid For roof areas of 

up to 250 m² 

Rain filter RF2 

For installation in front of tankInlet and outlet 

connection nozzles 

Overflow outlet nozzle 

For underground wastewater pipe joint DN 100 in 

each case 

Dome shaft, stepless height adjustment - centre of 

inlet to upper side of shaftfrom 370 mm to 540 mm. 

With filter basket andlockable, green shaft lid 


Backwash device 

(as above) for 3P 

cartridge filter PF, plus automatic rinsing 

For connection to ¾" tap: 

Adjustable backwash according to individual 

setting 

Adapter 1" and ¾” 


for cartridge filter and 3P volume filter 

If the water level rises in the rainwater 

storage tank, the rainwater flows into the 

sewer system or seeps away via the intake 

or skimmer opening. Any pollen that may be 

on the water surface is literally sucked into 

the skimmer opening. 

The excess water together with the pollen is 

conveyed out of the rainwater storage 

container. Outlet DN 100. 

Odour lock by means of syphon effect. 

Connection on filter side DN 100 (3P 

overflow syphon duo). 

Rodent barrier by means of narrow intake. 

Order no. 

08154 

08005 

08094 

Order no. 

08074 

08252 

By activating the backwash device, the 

spout sprays water at the sieve cartridge 

from below at a particular angle. 

The water jet penetrates the sieve mesh and 

removes any contamination. 

The water jet drives the filter cartridge and 

triggers a rotating motion. This enables the 

entire sieve mesh of the filter cartridge to be 

cleaned. 

The dirty water is flushed back into the 

sewer system. 

With dirt secretion 

into sewer system 

17

Pump switches 

on and off 

automatically 

when turning 

the tap on 

or off. 

18 

Conveying Technology 

1.) Pump for Garden Solutions 

DIVERTRON garden pump with automatic pressure switching 

Fully automatic 4-stage underwater pump 

With automatic pressure switching and dry run protection. 

Delivery includes lifting rope, suction sieve nozzle, compensation vessel 

and 15 m cable with plug. 

H m 

50 

45 

40 

35 

30 

25 

20 

15 

10 

5 

0 0 10 20 30 40 50 60 70 80 90 Q 1/min 

Garden pump DIVERTRON 

Max. discharge/discharge head 

Suction and pressure connection 

Motor voltage 

Nominal capacity 

Protection class 

Approx. weight 

2.) Pumps for House and Garden Solutions 

Multiexacta pump 

Wall bracket for Multiexacta pump 

Vibration-cushioned 

Order no. 

66047 

We reserve the right to make technical changes that enhance the product. 

The permissible temperature of the liquid to be pumped is between +2°C and +35°C. 


Horizontal rotary pump with automatic pressure switching. Brass housing and impellers made 

from stainless steel. Especially developed for service water systems with rainwater usage. 

Extremely quiet. 

Max. discharge/discharge head 

Max. pressure head 

Suction and pressure connection 

Output 

Protection class 

5700 l/h; 48 m 

R 1" IG, R 1" IG 

230 V, 50 Hz 

1.100 W 

IP 68 

11.5 kg 

4.500l/h; 45 m 

8/15 m 

R 1” AG 

700 W 

IP 54 

Order no. 

08099 

08098 

The permissible temperature of the liquid to be pumped is between +2°C and +35°C.

Domestic Water Systems 

For installation in home or basement forprofessional 

rainwater use in house and garden 

Automatic Rainwater Feed 

BFK eco 

Domestic water system 

BFK eco 

Subject to technical changes. 

BFK 

Domestic water system 

BFK 

Subject to technical changes. 

Order no. 

08246 

08327 

Order no. 

08080 

08328 

Service hotline for pumps 

01805 5388637 

The feed system ensures an automatic supply of rainwater from the underground storage tank to 

the sanitary water network, as well as an automatic drinking water feed into this network as 

required should the tank be empty, taking into account DIN 1988, Part 4 on the protection of 

drinking water. 

Both systems consist of: blue feed container with drinking water header approx. 15 litres, 

floating valve with unrestricted intake according to DIN 1988, 3-way valve, emergency overflow. 

Dimensions: W 565 x H 480 X D 375 mm, weight when empty approx. 22 kg 

According to DVGW provisions 

Pump including automatic pressure switching 

700 W, 4500 l/h 

Max. pressure head 8/45 

Max. suction length 15 m 

iIncl. float switch for electric control 

For suction lengths up to 30 m, pump as described 

above, however, with additional valve, illustration 

above 

According to DVGW provisions 

Pump including automatic pressure switching 

700 W, 4500 l/h 

Max. pressure head 8/45 

Max. suction length 15 m 

Incl. fill level indicator and sensor for electric control 

For suction lengths up to 30 m, pump as above, 

however, with additional valve, illustration above 

19

For optimal 

transporting 

of water 

The feeder set 

allows you to 

top up the 

tank to the 

required volume 

from the 

drinking water 

network! 

20 

3.) Conduits 

Suction pipe set 

Consisting of top-quality spiral pipe 

DN 31, 2 pipe clamps, 

Straight pipe connector with 

Retainer nut R 1 ¼", straight pipe 

Connector R 1 ¼" AG and reduction to 1" AG 

Length: 5 meters 

Length: 10 meters 

4.) Fresh Water Backfeed 

08177 

08178 

PVC spiral pipe DN 32 per running metre 08009 

Pipe clamp 08010 

Straight pipe connector 

with plastic retainer nut 

IG 1 ¼" NW 32 

Gerader Schlauchanschluss 

1 1/4" AG x DN 32 

Straight pipe connector 

1 ¼" AG x DN 32 

Reduction 

1 1/4" IG to 1" AG 

Reduction 

1 1/4" IG to 3/4" IG 

Reduction 

1 1/4" AG to 1" AG 

Fresh water feed 

with sensor 


Feed device with 15 m sensor, 

½" magnetic valve, feed funnel, 

stop valve and ½" flexi-pipe 

An earthed wall socket prevents the pump 

from dry running. 

Order no. 

08011 

08012 

08059 

64544 

64542 

65793 

Order no. 

08051

5.) Tapping Sets 

Garden tapping set 

Water socket for Gardena connector12.5 m PE 

pipe DN 25 and matching clamp fittingsfor 

connection to DIVERTRON garden pump 

House tapping set 

Floating suction with 15 m PE pipe DN 32, wall 

duct for underground wastewater pipe DN 100 

Transition bend and straight transition 

6.) Accessories 

Wall duct 

DN 110 for installation in: 

Underground wastewater pipe joint DN 100 

1x DN 32, 1x DN 50 for feed 

1x DN 16 for backwash filter, 2x cables 

Pneumatic fill level indicator 

For remote measurement up to 10 m, housing for 

wall mounting with indicator of fill level in %, 

including assembly set 


In underground wastewater overflow pipe 100 

Reliably prevents rodents from entering from sewer 

system 

Labelling set 

For rainwater usage system 

Consisting of: nameplate, adhesive film, 

conduitdesignation, 10 m warning tape, adhesive 

Order no. 

08304 

08303 

Order no. 

08096 

08047 

08052 

08156 

Complete 

water tapping 

packages 

Using the 

right 

accessories 

to achieve 

a professional 

solution 

21

22 

Drinking Water Storage Tank 

The KTW test report and the test according to W270 are available for 

the containers produced from food-safe PE plastic. This means that the 

containers are suitable for storing drinking water.Easy upgrading using 

the drinking water set enable Speidel underground water storage tanks 

to be used as drinking water storage tanks. 

Please clarify official provisions prior to installation! 

Drinking water set consisting of: 

· Lid seal for permanent leak-free closure 

· Air intake and outlet nozzles 

· Lid with stainless steel lock 

· Suitable hole cutter with centring drill for installation of air intake and outlet nozzles 

Accessoires 

Drinking water set 

For RTMO underground rainwater storage tank 

Accessoires 

Air vent DN 100 DN 100 

For RTMO underground rainwater storage tank 

08214 

To maintain drinking water quality by means of cool storage, we strictly 

recommend installation in conjunction with the dome shaft extension (item no. 08220, page 15). 

Wastewater Tank 

Ideal for green areas used for leisure activities, allotments etc. 

Tank table from 2,000 to 10,000 litres 

Vol. 

(l) 

Width 

mm 

Length 

mm 

Height 

mm 

Order no. 

The polyethylene (LLDPE) used for manufacturing the underground 

storage tanks is resistant to almost all chemicals as well as to elements 

from domestic wastewater and its reaction and decomposition product 

components. 

This makes the containers particularly suited for use as drainless 

collection pits. 

Easy retrofitting by means of an air vent enables Speidel underground 

storage tanks from 2,000 litres to 10,000 litres to be used as drainless 

collection pits. 

When abandoning use as a collection pit, e.g. through sewer system 

connection, the tank can be used as a rainwater storage tank without any 

problems, provided it has been professionally cleaned. 

2000 

3000 

4000 

5000 

7500 

10000 

1260 

1460 

1690 

1910 

2200 

2450 

2150 

2450 

2450 

2450 

2790 

3000 

1590 

1785 

2010 

2230 

2500 

2540 

Order no. 

08166 

Weight 

kg 

112 

158 

208 

258 

390 

500 

Order no. 

08200 

08201 

08202 

08203 

08204 

08330 

Besch 

einigung durch 

den Hersteller 

KTW- 

Prüfzeugnis 

Eignung der Kunststoff Behälter der Reihe RegenErdspeicher RTMO 

als Trinkwasserspeicher. 

Die Behälter werden hergestellt und vertrieben durch die Firma 

Speidel Tank- und Behälterbau Gm 

Tübinger-Str. 14 

D-72131 Ofterdingen 

1 Beschreibung der Tanks 

Die Behälter der Firma Speidel werden im Rotationsverfahren aus 

lebensmittelechtem und neuem hochwertigen 

PE-Kunststoff (Dichte 0,945 g/cm3 – MFI 4,0 g/10 min) als monolitiörper 

hergestellt. Durch die 

Rippenkonstruktion wird die erforderliche Steifigkeit für den unterirdischen 

Einbau erreicht. 

Alle Behälter sind mit einem ovalen Mannlochdom 600/80 mm für 

Einstieg und Wartung ausgestattet 

(Behältergröße 10.000 ltr Durchmesser 470mm). 

Der Verschluss des Doms erfolgt serienmäßig mit einem verschraubbaren, 

doppelwandig-isolierten 

Deckel aus PE (auch als abschließbare Variante erhältlich 

Vol. Ltr. Width mm Length mm Height (mm) Weight Best. – Nr. 

2000 1260 2150 1590 112 08200 

3000 1460 2450 1785 158 08201 

4000 1690 2450 2010 208 08202 

5000 1910 2450 2230 258 08203 

7500 2200 2790 2500 380 08204 

10000 2420 2840 2590 480 08013 

Standardmäßig sind die Behälter mit Zulauf- und Überlaufbohrung, 

Durchsteckdichtung und KG-Endkappe für 

Rohre DN 100 ausgestattet. Zusätzlich sind zwei weitere Bohrungen 

strinseitig am Dom für Lehrrohre und/ oder 

Be- und Entlüftung angebracht, welche ebenso mit 

Durchsteckdichtung und KG-Endkappe verschlossen sind. 

Test certificate at 

www.speidel-behaelter.de 

Eignung der Kunststoff Behälter der Reihe RegenErdspeicher RTMO 

als 

abflusslose Sammelgrube für fäkalienhaltige häusliche Abwässer 

Die Behälter werden hergestellt und vertrieben durch die Firma: 

Speidel Tank- und Behälterbau GmbH 

Tübinger-Str. 14 


1 Beschreibung der Tanks 

Die Behälter der Firma Speidel werden im Rotationsverfahren aus 

lebensmittelechtem und neuem hochwertigen 

PE-Kunststoff (Dichte 0,945 g/cm³ – MFI 4,0 g/10 min) als monolitischer 

Körper hergestellt. Durch die 

Rippenkonstruktion wird die erforderliche Steifigkeit für den unterirdischen 

Einbau erreicht. 

Alle Behälter sind mit einem ovalen Mannlochdom 600/800 mm für 

Einstieg und Wartung ausgestattet 

(Behältergröße 10.000 ltr Durchmesser 470mm). 

Der Verschluss des Doms erfolgt serienmäßig mit einem verschraubbaren, 

doppelwandig-isolierten grünen 

Deckel aus PE (auch als abschließbare Variante erhältlich) 

Vol. Ltr. Width mm Length mm Height (mm) Weight Best. – Nr. 

2000 1260 2150 1590 112 08200 

3000 1460 2450 1785 158 08201 

4000 1690 2450 2010 208 08202 

5000 1910 2450 2230 258 08203 

7500 2200 2790 2500 380 08204 

10000 2420 2840 2590 480 08013 

Standardmäßig sind die Behälter mit Zulauf- und Überlaufbohrung, 

Durchsteckdichtung und KG-Endkappe für 

Rohre DN 100 ausgestattet. Zusätzlich sind zwei weitere Bohrungen 

strinseitig am Dom für Lehrrohre und/ oder 

Manufacturer’s certification 

at www.speidel-behaelter.de

Rainwater Retention Tank 

For storage of rainwater for use of rainwater in house and garden 

For retention of water for relieving the communal sewer system network 

More and more frequently municipalities are requiring the use of a rainwater retention tank on private properties to 

be included in the development plan. The aim of these containers is to release the rainwater into the public 

wastewater network in a curbed manner. The Speidel retention tanks enable provision of the stipulated retention 

volume as well as simultaneous availability of a service water volume that can be used for the house and garden. 

The proportion of service volume and retention volume can be varied according to the table below. In addition, an 

option is provided for using the tank purely as a retention tank with the mere function of curbed outflow. 

Rainwater Retention Tank consisting of: 

Underground PE 

rainwater storage tank according to descriptions on page 14 

Retention overflow Retention overflow syphon (in the case of service water content) or underground 

wastewater pipe end cap (in the case of pure retention volume) with standard 

opening DN 20 or as required according to regulations for delayed release into the 

sewer system. Outgoing circuit to sewer system DN 100 

Total tank 

content (l) 

3000 

4000 

4000 

4000 

5000 

5000 

5000 

7500 

7500 

7500 

10000 

10000 

10000 

We will gladly advise you in creating an individual solution. 

Accessoires 

Retention 

volume 

(l) 

3000 

1500 

2500 

4000 

2000 

3000 

5000 

3100 

4400 

7500 

4000 

6000 

10000 

Variation 1 

With service 

water content 

Service water 

content 

(l) 

Variation 2 

Retention 

volume only 

Height-adjustable dome shaft 

For tank sizes 2000 to 10,000 litres, see page 15 for description 

0 

2500 

1500 

0 

3000 

2000 

0 

4400 

3100 

0 

6000 

4000 

0 

Width 

mm 

1460 

1690 

1910 

2200 

2450 

2450 

2450 

Length 

mm 

2450 

2450 

2450 

2790 

3000 

3000 

2480 

Order no. 

08220 

Height 

mm 

1785 

2010 

2230 

2500 

2540 

2540 

2540 

You can find additional accessories for a service water content configuration on page 16 

Order no. 

08199 

08160 

08161 

08205 

08162 

08163 

08206 

08195 

08196 

08207 

08194 

08164 

08345 

Installation example 

for retention tank 

with service water content 

23

24 

Rainwater Flat Tank 

Flat underground rainwater storage tank for underground storage 

Made from black, food-safe, indestructible PE plastic (recyclable), thick-walled and extremely 

dimensionally stable. Large manhole dome Ø 550 mm, opening Ø 480 mm. Double-walled 

insulated green dome lid, completely assembled with locking bolt. 

Vol. 

(l) 

Width 

mm 

Your benefits: Low installation depth 

Ideal for bedrock terrain 

Manual installation possible 

Minimal excavation 

2500 2000 2400 1000 128 08320 

Accessoires 

Length 

mm 


For suspending in mini underground storage using stainless steel snap hook 

3P-Filter Rainus 

Rainwater filter for installation in down pipe. 

Dirt is simply tossed out of the front. 

· Easy installation 

· Secure function 

· Easy maintenance 

Connection in down pipes of type 80 or 100. 

Housing made from top-quality PE. 

Includes stainless steel sieve. Up to 70 m2 roof area 


PE syphon for attaching to internal overflow connector nozzle. 

As odour block and for extraction of suspension substances 


Ground shaft (Ø 15 cm), plastic, green lid, 

safe to walk on. ½" pipe connector for conventional 

garden hose systems with stopcock 

12.5 m PE pipe DN 25 and matching clamp fittings 

for connection of Mamba garden pump. 


Suction sieve and lifting rope 

See page 18 for exact description 

Height 

mm 

Weight 

kg 

Order no. 

Order no. 

08233 

08251 

08125 

08304 

66047 –

Mini Underground Storage Tank 

500 / 1000 litres 

Compact rainwater storage tank for underground storage 

Made from black, food-safe, indestructible PE plastic (recyclable), thick-walled and extremely 

dimensionally stable. Large manhole dome Ø 550 mm, opening Ø 480 mm. Double-walled 

insulated green dome lid, completely assembled with locking bolt. 

Vol. 

(l) 

Ø 

mm 

500 1200 1000 40 08182 

1000 1200 1450 53 08066 

Accessoires 

Height 

mm 

Dome shaft 

Progressive height adjustment with step. 

For placing on manhole for protection against frost at height above ground 

of between 750 mm and 1000 mm. 

Outer diameter 550 mm, opening diameter 480 mm 

Made from black, indestructible PE plastic (recyclable), 

thick-walled and dimensionally stable. 

Cover with shaft lid of underground storage tank 


For suspending in mini underground storage using stainless steel snap hook 

Rainus 3P filter 







Housing made from top-quality PE. Includes stainless steel sieve. 

Up to 70 m² roof area 


PE syphon for attaching to internal overflow connector nozzle. 

As odour block and for extraction of suspension substances 


Ground shaft (Ø 15 cm), plastic, green lid, 

safe to walk on. ½" pipe connector 

for conventionalgarden hose systems with stopcock 

12.5 m PE pipe DN 25 and matching clamp fittings 

for connection of Mamba garden pump. 


Suction sieve and lifting rope 

See page 18 for exact description 

Weight 

kg 

Order no. 

Order no. 

08095 

08233 

08251 

08125 

08304 

66047 

25

26 

Infiltration 

More and more municipalities have introduced a split wastewater fee. This means that all metered households 

are rated according to the paved (compacted) area. To avoid billing in terms of the paved area, an option is 

provided to provide seepage for rainwater draining from paved areas. This has the benefit of saving costs through 

seepage. As the costs are frequently 2 € per year/per m2 paved area, investment in a seepage system pays itself 

off relatively quickly. 

Seepage Block as Assembled Module 

Your benefits: 

Seepage block is ready 

to be connected 

Filter fleece already assembled 

Can be driven on by car if 

installed 80 cm underground 

The recommended values apply to regions in 

Germany with an average precipitation volume of 

700 - 800 l/sqm/year, for example. Should you 

decide for a low storage volume, this would result in 

frequent overflow of the seepage system with 

diversion to the neighbouring property or into the 

public sewer system. Precise dimensioning 

according to local rain figures. 

Seepage Block including Filter Fleece 

Vol. 

Ltr. 

Length 

mm 

Dimensioning 

Recommended dimensions according to ATV A-138 

kf(m/s) Paved area (A red) 

100 m² 150 m² 200 m² 

Coarse sand Storage volume 800 l 

-3 

kf = 1 x 10 

Medium sand Storage volume 

-4 

kf = 1 x 10 

Fine sand Storage volume 

-5 

kf = 1 x 10 

Silt Storage volume 

-6 

kf = 1 x 10 

600 1200 1200 400 24 08323 

Accessoires 

Air vent DN 100 


Page 24 

RF 2 rain filter 

Page 17 

Width 

mm 

Height 

mm 

1600 l 

2600 l 

2800 l 

1200 l 1600 l 

2200 l 

3800 l 

4200 l 

Rain figures: Kostra DWD, frequency of rain n = 0.2, net storage volume of seepage elements 95% 

Weight 

kg 

Order no. 

Order no. 

08166 

08251 

08094 

3500 l 

5600 l 

6200 l

Seepage Shaft 

Dimensioning: 

Determination of rainfall duration frequency (see map) 

-6 

Determination of ground type (permeability of at least 10 m/s) 

Determination of pit dimensions (table below) 

Your benefits: 

Robust seepage shaft 

Installation without excessive use of devices 

Multiple flat surfaces enable connection 

of additional seepage pipes 

Option overhauling seepage system 

Gravel can remain in ground and be 

built over for purposes of seepage 

Ground permeability 

-3 

Kf = 10 (gravel) 

-4 

Kf = 10 (medium sand) 

-5 

Kf = 10 (fine sand) 

-6 

Kf = 10 (silt) 

Connected paved area = 100 m² Connected paved area = 200 m² 

Rainfall duration 

frequency up to 100 

l/(s·ha) 

L/W/H (pit) in m 

1.80 x 1.80 x 1.10 

2.00 x 2.00 x 1.40 

3.00 x 2.00 x 1.40 

3.00 x 2.30 x 1.40 



l/(s·ha) 


1.80 x 1.80 x 1.20 

2.40 x 2.40 x 1.50 

3.00 x 3.00 x 1.50 

3.00 x 3.00 x 1.60 

*Where areas are adjusted, proportional additions and deductions can be made 

Vol. Weight 

Order no. 

500 ltr. 40 08086 


For suspending in seepage shaft using stainless steel snap hook 

Cost comparison: 

A seepage solution by means 

of a seepage shaft 

is recommended if gravel is 

available locally at cost-effective prices. 

Order no. 

08233 



l/(s·ha) 


2.00 x 1.80 x 1.20 

2.60 x 2.60 x 1.70 

3.00 x 3.00 x 1.80 

3.00 x 3.00 x 2.00 



l/(s·ha) 


2.20 x 2.20 x 1.50 

3.30 x 3.30 x 1.70 

3.60 x 3.60 x 2.00 

3.80 x 3.80 x 2.00 

Installation: 

Fill the pit with gravel of grain size 16/32. Surround the packed gravel with filter fleece (available from all hardware 

stores) all the way round. Please take note of the detailed installation instructions at www.speidel-behaelter.de 

Seepage shaft 

As an alternative to seepage block on page 26 

27

28 

Rainwater Column 300, 500, 1000 or 2000 litres 

New "rainwater drum": Far greater capacity for collecting running water than 

your "old" one – using the same space. 

No ladling, no pumping! That’s watering at its best: 

You simply draw water from one of the two taps* directly into your watering can or by means of a 

hose (19 mm hole width) – without a pump. 

The rainwater column stands for effortless watering using a garden house or watering rod: static 

water pressure means that the hose can be directly connected – without additional pump. 

The solar tempered water significantly promotes plant growth.Made from food-safe, indestructible 

PE plastic (recyclable), thick-walled and extremely dimensionally stable. Top opening Ø 460 mm 

and slip lid.Filling: three connection options at top (undrilled) for rain collector. 

Watering can outlet: internal thread R 4/4" with dummy plug. 

Garden hose outlet: internal thread R 4/4" with dummy plug. 

*Not included in scope of delivery 

300 litres 

price excl. VAT 

Transport costs 

excl. VAT 

500 litres 



excl. VAT 

1.000 litres 



excl. VAT 

2.000 litres 



excl. VAT 

Anthracite Green Grey 

Item no. 08334 Item no. 08319 




Item no. 08321 

13 kg 

ø 55 


25 kg 

ø 65 


44 kg 

ø 80 


72 kg 

ø 115 

150 

141 

184 

168 

238 

219 

233 

211

Summer 

operation 

Accessoires 

Watering can outflow, brass 

Ball cock 199 mm hole width, R ¾" AG 

Watering hose outflow 

Ball cock 19 mm hole width, R ¾" AG 

With GEKA quick coupling 

Plastic drainage tap 

Drainage tap for Gardena connector R3/4" AG 

Geka quick coupling 

With hose nozzle for watering hose19 mm 

hole width (3/4") 

Storm protection for RS 500 litres 

for wall distance 50 or 250 mm (see illustr. on the right) 

Storm protection for RS 1000 litres 

for wall distance 50 or 250 mm (see illustr. on the right) 

Winter 

operation 

08019 

08020 

69129 

08021 

08189 

08188 

For all collection containers above ground 

Rain Collector 

with automatic filling 

no overflow of collection container 

RG 100F with filter 

and hose nipple Ø 50 mm 

RG 75/87F with filter 

and hose nipple Ø 50 mm 

Order no. 

Extension set 

Ø 50 mm, L-200 mm for connection 

to rain container above ground 

For down pipe 

with outer 

diameter of (mm) 

98-110 

75-87 

20071 

20073 

20010 

Order no. 

Green Grey 

Rain collector 

Rainwater 

column 

Pipea approx. 

100 mm long 

250 mm 

wall distance 

50 mm 

wall distance 

The rain collector supplies storage containers above ground – no need for 

maintenance or operation. 

20071-01 

20073-01 

– 

Also 

in grey! 

The rain collector can be inserted into the existing down pipe in just a few steps, and 

set to winter operation by means of the supplied insert. 

29 

Double-layered 

sieve insert with 

coarse and fine sieve 

Optimal water outflow 

thanks to tilted 

level 

Removable section 

for winter operation

30 

Rainwater Basement Tank 

Rainwater as much as you like - for garden and home 

The rainwater basement tank allows flexible rainwater usage systems for house and garden to be 

installed. Setup is quick and in almost all locations – in basements as well as in the open.The 

1500 litre capacity of the tank can be extended by additional tanks. 

Made from grey, food-safe, indestructible PE plastic (recyclable), thick-walled and dimensionally 

stable. Large dome Ø 460 with dome lid. Flat surfaces on 3 sides with markings for intake, 

overflow, tapping (undrilled). Connection to rain collector also possible. Additional flat surfaces for 

further tank connections (such as fill level indicator, drinking water feeder with floating 

sensor).Includes DN 50 hose nozzle (undrilled) for extension as tank battery. Watering can outlet 

and IG ¾" garden house outlet with dummy plug. 

Vol. 

Ltr. 

Length 

mm 

1500 1200 780 2080 85 08053 

Accessoires 








Housing made from top-quality PE. 

Includes stainless steel sieve. 

For roof areas up to 70 m² 

Mechanical fill level indicator 

For installation in rainwater basement tank 

with floater and display (measurement range in %). 

Complete with screw joint 

Gentle infeed 

Underground wastewater pipe DN 100 

for attachment to twin connector flange 

Overflow flue 

Underground wastewater pipe DN 100 as suspension 

substance flue for attaching to twin connector flange 

Tapping suction pipe 

As set consisting of: 

tank screw joint R 1 ¼", 

90° bend, suction pipe, 

check valve and suction filter 

Twin connector flange DN 100 

for attachment of underground wastewater pipe 

a) for intake and gentle infeed 

b) for overflow and suspension material extraction 

or alternatively: 

gland seal for DN 100 pipe 

(for bores of Ø 121) 

Width 

mm 

Height 

mm 

Weight 

kg 

Order no. 

08251 

08048 

08054 

08044 

08058 

08063 

65448 

Order no.

Continuation of accessories 


Max. discharge/discharge head 4,000 l/h = 45 m 

Max. pressure head/length 8/12 m 

Suction and pressure connector R 1" AG 

Output 700 W 

Protection type IP 54 

Wall bracket for Multiexacta pump 

Vibration-cushioned 

Basement tank drinking 

water feeder set 

With sensor for feeding of rainwater collection 

container as required. 

Consisting of: control device as connector housing; 

sensor with 5-pole connector cable 15 m in length. 

Magnetic valve 220/230 V with ¾" water connector, 

sieve insert, connector cable to connector housing 

Plastic inlet funnel 

Basement tank connection set 

for connecting tank 

Consisting of:1x PVC pipe transparent 

DN 50, 1 metre 

2x pipe clamps 

Suction pipe set 

Consisting of spiral pipe DN 32, 2 pipe clamps, 

straight pipe connector R 1 ¼" with retainer nut, 

straight pipe connector 1 ¼" + reduction 1 ¼"IG – 1" AG 

Length: 5 metres 

08099 

08098 

08050 

08260 

08177 

Make maximum usage of your space 

We will gladly realise 

your individual basement configuration 

Order no. 

(ohne Pumpe) 

Convenient drinking 

water top-up 

Multiple 1,500 litre 

tanks can be extended 

to horizontal or 

vertical battery 

of tanks 

Flexible for 

optimal space usage 

Connections for 

watering tapand 

connection hose 

Large range 

of accessories 

31

Pour 

directly 

without pump! 

32 

Rainwater Roof Tank 

The invisible upright container for the garage roof 

The under-used area in your roof is perfect for accommodating the Speidel rainwater 

roof tank out of sight. 

Almost invisible from below, this tank has the advantage of providing consistently high, constant 

water pressure. Ideal for convenient watering by means of hosepipe or hose rod without an 

additional pump being required. 

700 litres can be collected here. Multiple tanks can be connected to make up a battery of tanks. 

Supply takes place via the rain collector. Where required, a spacer tube can be used to bridge the 

distance between the down pipe on the house and the garage. 

The weight of the full tank has been aligned to the normed load-bearing capacity of the 

roof of a prefabricated garage (200 kg/m²). 

UV and algae protection thanks to weather-resistant, pebble-grey, food-safe PE plastic 

(recyclable), thick-walled and extremely dimensionally stable. 

Cleaning opening Ø 200 mm hole width with screw lid. Intake bore Ø 50 mm on the top of the 

front side for rain collector connection. At bottom of both front ends outlet with internal thread R 

¾" and dummy plugs. 

Vol. 

Ltr. 

Length 

mm 

Accessoires 

Rain collector; see page 29 

Roof tank outlet set 

for water with drawal, consisting of 

5x plastic bends, 1x adhesive joint, 1x Ms ball cock, 

plastic pipe length 2.5 m, 3x pipe mountings, 

1x GEKA coupling, 1x plastic twin nipple, 

1x adhesive 125g , set price: 08181 

Roof tank connection extension set 

from rain collector to rainwater roof tank for distance of more 

than 200 mm from rain collector to container, consisting of: 

1x plastic connector pipe length 2.5 m, 

4 hose clips, set price: 08016 

Roof tank connection set for linking two tanks, 

1x 2.5 m pipe, 2x plastic bends 

¾" AG/adhesive joint, 1 x adhesive 125g, set price: 08193 

The clever 

solution… 

Width 

mm 

Height 

mm 

Weight 

kg 

Order no. 

700 2400 1500 280 57 08027 

Order no.

Storage Tank 

For use above ground / Storage of rainwater 

Made from black, food-safe PE plastic (recyclable), thick-walled. 

For collecting large volumes of rainwater, with setup above ground. 

The tank is absolutely leak-proof as it has been manufactured from one piece without 

welded seam. 

Equipment: 

Hinged lid of 380 mm diameter 

and 2” outlet nozzles above container base. 

Vol. 

Ltr. 

Coupling example: 30,000 litres 

Accessoires 

Ø 

mm 

Height 

mm 

6,000 2170 1970 200 25060 

10,000 2450 2610 350 25100 

Twin filter 

With two-stage cleaning for direct installation in wall. 

For roof areas of up to 700 m². Dirt is automatically 

flushed in the direction of the sewer system. 

Connectors either DN 100/ DN 150 

Weight 

kg 

Order no. 

Order no. 

08329 

(Indication of measurements and weight +/- 2%) 

33

Please note: Measurements indicated may vary by +/- 2-3% from the actual measurements! 

34 

H 

Rain columns: 

[cm] 

300 Ltr. 

Item no. 08321/08322 

28 

100 

H P 

150 

141 

35 

150 

L Tank 

500 Ltr. 


ø 55 ø 65 

Rainwater roof tank, 

700 litres 

15 

184 

168 

35 

43 

H D 

240 

1000 Ltr. 


145 

ø 80 

Item no. 08027 [cm] 

Flat tank, 2500 litres Item no. 08320 [cm] 

H P 

219 

35 

ø 120 

W Tank 

238 

2000 Ltr. 


ø 115 

43 

211 

35 

H P 

233 

Height-adjustable 

dome shaft 


max. 100 

min. 80 

[cm] 

Underground rainwater storage tank, 500 litres and 1000 litres 

500 Ltr. Item no. 08182 1000 Ltr. Item no. 08066 

15 

[cm] 

RTMO Underground 

rainwater storage tank Item no. 08200, 08201, 08202, 08203, 08204 

[cm] 

Tank volume 

in litres 

2,000 

3,000 

4,000 

5,000 

7,500 

10,000 

L Tank 

(cm) 

214 

245 

245 

245 

280 

300 

W Tank 

(cm) 

126 

145 

169 

191 

220 

245 

H Tank 

(cm) 

159 

178 

200 

222 

150 

254 

H E Inlet 

(cm) 

138 

157 

180 

202 

229 

236 

H A Outlet 

(cm) 

120 

139 

162 

184 

211 

218 

Tank with dome shaft (item 08220) 

H P Flat H D Diameter 

surface (cm) (cm) 

142 

159 

183 

206 

234 

238 

Rainwater basement tank, 

1500 litres 

[cm] Item no. 08053 

127 

147 

170 

192 

221 

246 

183 

208 

120 78 

Dome shaft with stepless 

height adjustment 


H 

max. / min 

Tank with 

dome shaft 

Height (min.) 

204 

223 

245 

267 

295 

299 

max. 100 

min. 75 

[cm] 

Tank with 

dome shaft 

Height (max.) 

224 

243 

265 

287 

315 

319 

38

Frequently Asked Questions (FAQ)/ Info service: 

What is the position regarding hygiene of rainwater for toilets and washing machines? 

Research has showed that the mean germ count found in rainwater is significantly less than the reference values for 

swimming water or foodstuffs (e.g. salad). When using rainwater for toilet flushing, germs do not play any role as their 

count in relation to the main germ carrier in human faeces is negligible. The same applies to laundry. A comparison of 

the germ count of soiled, unwashed laundry with the germ count of rainwater produces the same ratio. 

Concrete cisterns or plastic tank. Which is better? 

By comparison to concrete cisterns, plastic tanks can generally be transported without heavy moving equipment, due 

to their lower weight, thereby avoiding large-scale damage to the construction pit and in the garden. This is of 

particular significance if you are installing a rainwater usage system in your garden at a later stage. An additional 

advantage of a plastic tank is that it easier to clean, as concrete tanks have rough interior walls on which dirt 

accumulates more easily. A risk also exists that the rainwater can become contaminated by erosion of cement particles, 

which can at worst cause pump damage. In addition, limescale precipitated from the concrete cistern can "harden" the 

rainwater, which is actually low in limescale, thereby reducing the lifespan of your washing machine. 

How often must the tank be cleaned? 

Depending on the rainwater pre-cleaning process (filter), the tank must be cleaned at the earliest every 8 - 10 years. 

Non-filtered fine suspension particles enter the tank, sink to the bottom and form a sedimentation layer, which even 

has a positive effect on the water quality (see next question). This means that cleaning should only be undertaken 

after a thicker sediment layer has formed. 

What is sedimentation and how does it work? 

Sedimentation cleans the accumulated water, and is therefore as important as pre-filtration. Non-filtered fine 

suspension particles enter the tank and sink to the bottom as a result of their own weight. Dissolved substances adhere 

to the sinking suspension substance (adsorption), which are similarly removed from the water and deposited in the 

sediment. This results in clear water of a high quality above the sediment. You should however ensure that the 

sediment layer is not agitated, namely by means of gentle infeed. 

How much can I save and how economically feasible is this? 

You can save up to 50% of your daily drinking water requirements using a rainwater usage system. This could be up to 

70 litres per person per day (including use for toilets, washing machine, garden irrigation and car washing). If you take 

into account the increasingly difficult and costly preparation of drinking water, the forecasted doubling in the price of 

drinking water in the coming years is completely logical. This makes a rainwater usage system feasible on two counts: 

The system relieves pressure not only on our environment, but also on your finances in the long term. 

Which statutory regulations must I take into consideration regarding top-up of the rainwater usage 

system? 

· Strict separation of drinking water and rainwater 

DIN 1988 deals with the protection of drinking water from contamination.This means that a gravity feed must be used 

for the supply of drinking water in rainwater usage systems. Naturally all Speidel drinking water feeders have been 

equipped with a "gravity feed" as standard. 

· Designation of pipes and tapping points 

Tapping points must be designated in such a way that it is at all times clear which tapping points and pipes are carrying 

rainwater. 

To this end, Speidel offers a labelling set on page 21. 

Are public subsidies available for rainwater usage systems? 

The installation of systems for use of rainwater is now directly or indirectly supported by some municipalities as a 

measure for active ground water protection. You can find relevant information as to local subsidy options from your 

local building and environmental office. 

35

Additional items in our interesting product range: 

Prices and technical design of the products listed are subject to change 

Containers: Storage · Transport · Provision 

Speidel Tank- und Behälterbau GmbH 

Krummenstraße 2 


Phone: +49 (0) 7473 9462-0 

Fax: +49 (0) 7473 9462-99 

Internet: www.speidel-regenwasser.de 

e-mail: verkauf@speidel-behaelter.de 

05-2011/3

Rainwater Harvesting Systems - Speidel Tank

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