Boiler Expansion Vessel Replacement

Repressurising the expansion vessel.

Boiler expansion vessel replacement. 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. Pumping up a gas combi boiler expansion vessel. This video shows you step by step on how to change an expansion vessel on a worcester boiler. Some internal expansion vessels can be very difficult to replace though improved designs on newer boilers now generally make it easier.

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. If you have a combi boiler you will have an expansion vessel. 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. Pumping up the expansion vessel in a combi boiler.

So if you need to replace this part of your boiler make sure you call a heating engineer. If the diaphragm in a vessel internal to the boiler fails provided it hasn t rusted through the vessel may be left in place and a replacement vessel fitted externally. Expansion vessels also known as expansion tanks can be found in most domestic pressurised heating systems. 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.