CONDENSING BOILER CONDENSATE DISCHARGE PIPE INSTALLATION GUIDANCE

In 2010 and again in 2018 the UK experienced prolonged spells of sub-zero temperatures. This resulted in a significant increase in the number of calls to boilers where the condensate discharge pipe had frozen and become blocked with ice, causing the boiler to shut down. In the most cases such problems occur where the condensate drainage pipe is located externally to the building for some part or all its length.

British Standards, Building Regulations and various guidance currently advise on how condensate discharge pipes should be run either internally or externally, or a combination of both. This document gives guidance on how to install the pipes to reduce the possibility of freezing.

NOTE – This guidance may not be enough to prevent freezing in extreme conditions – with widespread and prolonged sub-zero temperatures.

In addition to this guidance all other technical requirements for condensate discharge installation given in British Standard BS 6798:2014, or in boiler manufacturers’ installation instructions should still be followed.

Please click the link below for the full Technical Advice Document:

CONDENSING BOILER CONDENSATE DISCHARGE PIPE INSTALLATION GUIDANCE