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4 Installation Procedure4.11 Condensate Drain Connectiona) Route the condensate drain via a tundish or other suitable vented pipework to asuitable drain.b) Ensure that the drainage pipework has a minimum fall of 1 in 20 away from the boiler.c) All pipework must be of plastic and must not be reduced in diameter throughout itslength.d) Ensure that the siphon is full of water before firing the boiler.Terminating into an internal waste systemA O22mm plastic condensate pipeB External length of pipe 3m max.C Open end direct into gully, belowground but above water levelTerminating into an external waste systemA O22mm plastic condensate pipeB External length of pipe 3m max.C Open end direct into gully, belowground but above water levelAABBCCCondensationdrain at boiler backATerminating into an external purposemade soakawayA O22mm plastic condensate pipeB External length of pipe 3m max.C Open end direct into gully, belowground but above water levelATerminating into an internal waste systemA O22mm plastic condensate pipeB Internal soil and vent stackBBC35
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