Does expansion vessel go on flow or return?

Does expansion vessel go on flow or return?

The Expansion Vessel must be fitted to the Return Side of the Central Heating System and in such a way that there can at no time be an obstruction between the vessel and the system.

Where should an expansion vessel be installed?

The expansion vessel should be installed vertically above the pipe with the water connection at the bottom and the air valve upper most. Expansion vessels are supplied pre-charge with air, this may be increase or reduced via the air valve to suit site conditions.

Which way does the expansion vessel go?

it doesn’t matter which way up it is… ensure that the air point is accessable, for future maintenance.

Do I need a bigger expansion vessel?

As we all know, when water is heated it expands and wants to take up more volume. As the system is basically a closed loop, consisting of the boiler, pipework and radiators, it is necessary to provide some space for the water to expand into. This is why the expansion vessel is required.

Where do you put the expansion tank on a boiler?

The expansion tank needs to be installed on the suction side of the hot-water circulator, on the bottom of the supply line. The boiler system is then re-pressurized and should be checked for any leaks. If leaks are found in the system, they need to be repaired to prevent any pressure drops.

What pressure should a expansion vessel be set at?

Some important things to consider is the air pressure inside the expansion vessel. It rarely needs to be anything more than 1.5 bar in most domestic properties. Anything more and the water may not expand into the air at the required time and could risk the high pressure relief valve opening or worse.

Does an expansion vessel have to be upright?

They should be mounted vertically to cut down on debris becoming trapped, fitted with an isolation valve and be designed to minimise the amount of water held inside the vessel and stimulate the flow of water.