TGD H 2010 – 1.2.2.7 – Branch pipes

1.2.2.7 Condensate drainage from boilers should be connected to wastewater pipework. The connection should be made using pipework of a minimum diameter of 22 mm. If an additional trap is provided externally to the boiler to provide the 75 mm seal, an air gap should be provided between the boiler and the trap. The pipe material should be resistant to acid as the condensate is slightly acidic, e.g. plastic. Copper and mild steel pipes and fittings should not be used. Further guidance is available in “Heating and Domestic Hot Water Systems – Achieving compliance with Part L 2008” (see Appendices A10 and A13).

C:BCARTGDTGD hTGD%20H%202010TGD%20H%202010%20-%20SECTION%201%201.2.2.7.pdf