Worcester Expansion Vessel 87161055450

The Worcester 87161055450 expansion vessel is a device to handle the expansion of water in a heating system or hot water system due to increases in temperature. When water rises in temperature this expands, particularly when it is kept under pressure such as in a sealed heating system or an unvented hot water cylinder. Expansion vessels typically consist of a storage container or disc which is divided inside into two compartments separated with a rubber sheet, known as the diaphragm.

Inside the expansion tanks there is water on one side of the diaphragm and air or an inert gas such as nitrogen under pressure on the other side. An air valve very much like those found on bicycle and car tyres is typically provided within the air side to permit the system to be re-pressurised.

This Part Fits: 

Worcester 24I NG JUNIOR FSN COMBI

Worcester 24I LPG JUNIOR FSP COMBI

Worcester 28I NG JUNIOR FSN COMBI

Worcester 28I LPG JUNIOR FSP COMBI

Worcester GREENSTAR 12I FSN NG

Worcester GREENSTAR 12I FSP LPG

Worcester GREENSTAR 24I FSN NG

Worcester GREENSTAR 24I FSP LPG

Worcester GREENSTAR 24I JUNIOR

Worcester GREENSTAR 24I JUNIOR

Worcester GREENSTAR 25SI FSN NG

Worcester GREENSTAR 25SI FSP LPG

Worcester GREENSTAR 28I JUNIOR

Worcester GREENSTAR 28I JUNIOR

Worcester GREENSTAR 30SI FSN NG

Worcester GREENSTAR 30SI FSP LPG