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Pumps & Pressurisation > Expansion Vessels

Category image for Expansion Vessels

Expansion vessels are water storage tanks which protect heating and hot water systems from excessive pressure, as the system pressure builds as the water is heated. Within a pressure vessel is a rubber diaphragm (membrane) behind which a volume of air is contained, on the other side of the membrane is the system water. As the water heats and expands, the air is compressed, allowing the system pressure to safely increase within risk of burst pipework or appliances.

PHC stock a comprehensive range of different expansion vessels for heating, potable water and high temperature solar applications. We carry vessels from leading manufacturers including Zilmet, Aquasystem, Reliance Water Controls, Varem, Watts, Cimm and more. We also supply expansion vessel parts and accessories including replacement membranes, sealed system kits, mounting brackets, schrader valves and valve removal tools, connection hoses and fittings, manual and electric expansion vessel pumps and pressure hoses.

EV0106

In Stock
£51.46
£42.88
Logo for Zilmet

EV0104

In Stock
£51.19
£42.66
Logo for Zilmet

RW1130

In Stock
£16.37
£13.64
Logo for Reliance Water Controls

RW1725

In Stock
£53.20
£44.33
Logo for Reliance Water Controls

EV0308

In Stock
£84.89
£70.74
Logo for Zilmet

RW1730

In Stock
£60.85
£50.71
Logo for Reliance Water Controls

RW1700

In Stock
£33.79
£28.16
Logo for Reliance Water Controls

RW1720

In Stock
£47.92
£39.93
Logo for Reliance Water Controls

EV0306

In Stock
£70.56
£58.80
Logo for Zilmet

EV0132

In Stock
£11.23
£9.36
Logo for Zilmet

EV0108

In Stock
£55.81
£46.51
Logo for Zilmet

RW1727

In Stock
£58.48
£48.73
Logo for Reliance Water Controls

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