Harmer Floor & Shower Drains Oct 14-file045956

Harmer Floor & Shower Drainage -
Design Considerations
The appropriate selection of a suitable Harmer Floor or Shower gully can be determined
by a number of factors as outlined below.
Building Regulations and Standards
Harmer Floor and Shower gullies have been developed in
accordance with current Building Regulations and British
Standards to ensure that the gully is fit for purpose in its desired
application. BS EN 1253 gives guidance on the appropriate
general design, flow performance and load testing.
Load Rating
It is essential that the Harmer Floor or Shower gully can
withstand the expected load. In accordance with BS EN 1253,
load classifications are based on the following:
Application BS EN 1433 BS EN 1253
(Drainage Channels) (Gullies for Buidings)
BS EN 124
Flow Rate
(Manhole & Gully Tops)
A15
The flow rate is the maximum drainage capacity of the Floor
gully, which is stated in litres per second (l/s). The flow rates are
typically influence by a number of gully components which
include grating type and size, waste basket, trap configuration*,
sump depth and outlet spigot size.
Expected flow rates can be determined by contacting the
manufacturer of the appropriate discharging equipment. This can
include shower heads, industrial kitchen equipment such as
tilting kettles and other means of water discharge.
K3
— L15
B125
M125
C250 —
D400 —
E600 —
Flooring and Floor Construction
There are a variety of floor finishes available, such as ceramic
tile, sheet such as Vinyl, resin and cementitious floor. These will
influence the type of grating or cover to be specified. Harmer
Floor and Shower Gullies are available with a variety of tops and
gratings for all different floor finishes.
The floor construction, including depth of the structural slab and
available floor build-up will influence the gully selection. Gullies
are available with DPM clamping rings, extension pieces for deep
floor construction and adjustable bezels for varying floor heights.
Pipework
The type, size and position of the waste pipework is all required
to correctly select the correct Harmer Floor or Shower gully.
Harmer gullies are suitable to connect to all pipework which
include direct socketed pipe or connection via a coupling.
Appearance
The Harmer Floor and Shower Gully ranges are available with a
wide range of gratings to suit a variety of applications. Stainless
Steel or Nickel Bronze finish gratings can be considered for
applications where a high aesthetic appeal is required. Cast Iron
gratings are available where a low aesthetic appeal is required,
such as in plant rooms or unfinished floor areas.
Accessories
The Harmer Floor and Shower Gully ranges are available with a
large number of accessories to accommodate specific drainage
requirements such as side inlets, large filtration of silt and
backflow prevention. Custom made product are available for
non-standard applications.
Material and Finishes
The correct material selection of the Harmer Floor and Shower
Gully is an important consideration to ensure that the selected
Gully is suitable in terms of corrosion resistance, hygienic design,
strength, durability and appearance.
*The flow rates shown in this brochure are based on maximum
capacity of the grating.
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