Condensate termination and route

Greenstar Highflow CDi combis incorporate a condensate pump which allows condensate to be plumbed above the boiler, allowing more flexible siting possibilities.

Condensate connection

The condensate pump fills up and periodically discharges through the flexible condensate pipe between 200mm and 4,500mm from floor level. After this point the condensate continues down the 22mm rigid pipework to the outlet using gravity.

• The flexible plastic pipe can be reduced in length to suit the installation circumstances. The pipework must follow one of the options shown below.

Never terminate or discharge into any open source, including: sink, bath, shower, bidet, toilet etc.

Note: any external condensate pipework should be protected with weather resistant insulation to help prevent freezing.

The condensate connection on Worcester appliances is in 22mm polypropylene. The pipe should be extended and run away from the appliance with a constant fall of 3º or 50mm in every metre away from the boiler.

The condensate pipe can terminate into any one of five areas (see below).

Whilst all of the methods are acceptable it is always the best practise to terminate the condensate pipe via an internal waste system. This will eliminate the need for any external condensate pipe runs which can be susceptible to freezing in extreme weather. Best practise is not to run external condensate pipe any further than 3m. If it is necessary to run more than 3m externally increase pipe size to 32mm.

Internal sink/washing machine drain

Soil and vent stack

External condensate absorption point (unsuitable for clay soil types)

External air break when using a rain water down pipe