UK households are being urged to clean a key boiler drain this October to avoid being left without heating during the winter months. Boiler expert Patrick Garner of Heatable warned that failing to do so could result in homes losing their heating and hot water.
The condensate pipe check
The advice focuses on the condensate pipe, the small plastic pipe that connects directly to the boiler. Garner explained: "The condensate pipe carries away acidic wastewater produced as modern condensing boilers extract heat from their exhaust gases. This is usually discharged into an outside gully or soakaway."
"If that water can’t escape, the boiler can shut itself down," he added. This can happen quickly, as a condensing boiler can produce up to around two litres of condensate an hour, meaning a blocked drain can soon leave a home without heating or hot water.
Frozen condensate problems
Frozen condensate is one of the most common problems affecting boiler condensate systems in UK homes. "During the severe winters of 2010 and 2018, boiler manufacturers received thousands of calls from homeowners facing problems with their heating or hot water linked to frozen condensate," added Garner.
Most people still do not know there is a simple way to reduce the risk. "Before the weather turns properly cold, clear away leaves, mud and other debris from the condensate discharge point and the gully it runs into," advised Patrick. "Then take a quick look at the outside pipe."
How to protect your boiler
Garner also recommended checking the pipe size: "You should really have an external condensate pipe of at least 32mm, to help reduce the risk of freezing. If yours is thinner, it’s not the end of the world, but do ask your heating engineer about it at the next service."
An additional tip from the expert was to insulate the outside pipe. Patrick said: "Properly insulating the outside pipe can also help protect the condensate from freezing during cold weather."
This five-minute check could save homeowners from a cold home and an expensive engineer call-out this winter.
