Boiler Condensate Pipe Blocked? How to Find and Fix

Condensing boilers produce wastewater (from the flue gases) that needs to run freely down through the boiler, into a trap, then down a plastic pipe and into a drain. Having a blocked condensate pipe means your boiler will not work. I have been repairing boilers for over a decade and fixed many condensate pipe problems.. What is boiler condensate? Condensing boilers are designed to not only use the heat generated by the combustion process, but also the heat of water vapour content.Older, non-condensing models could waste up to 50 per cent of the heat produced due to gasses escaping up the flue. In new appliances, the energy in these gases is captured and used to preheat the cold water that enters the boiler.

Structure And Functions of The Condensate Trap Before the condensate is expelled through the condensate pipe, the water is accumulated in the sump of the boiler. After that, it flows to the condensate trap. A condensate trap has two jobs. First, a barrier is formed between the combustion areas and the condensate pipe by the water.. The purpose of the condensate trap is simply to collect the condensation and any water vapour produced by your boiler in the heating process so it can be removed from the system. While operating, your boiler can create up to 2 litres of condensation, which is then drained out of the system through the condensate pipe.