Boiler Expansion Vessel Replacement

If you have a combi boiler you will have an expansion vessel.

Boiler expansion vessel replacement.

This vessel contains air and water from the central heating system and its purpose is to maintain the right level of pressure in the system. First we switch off the boiler from the mains and shut the flow. In some cases the boiler needs to be taken off the wall in order to fit a new expansion tank and this involves disconnecting the flue. An expansion tank is not found in steam boiler systems which create heat by circulating hot vapor rather than hot water through the pipes and radiators.

Expansion vessels also known as expansion tanks can be found in most domestic pressurised heating systems. Steam boilers are simpler systems that lack several components found in hot water boiler systems such as the circulating pump expansion tank and regulators for water pressure and temperature. This video shows you step by step on how to change an expansion vessel on a worcester boiler. So if you need to replace this part of your boiler make sure you call a heating engineer.

Pumping up a gas combi boiler expansion vessel. Repressurising the expansion vessel. Depending on where it is situated complex parts of your boiler may have to be taken out in order to get to the vessel. Worcester bosch expansion vessels also sometimes called expansion tanks or pressure vessels are a component fitted internally to worcester bosch combi type and sealed system boilers and it s function is to compensate for the expansion of hot water as water will expand when heated producing a rise in pressure within the sealed or closed system.