General biomass boiler plumbing installation specialist equipment. Including thermal safety devices, safety pressure release valves and pumps.
Expansion vessel is an important part of a modern closed heating system. The vessel is designed with a bladder or diaphragm in the centre of the vessel. As water is heated it expands. To absorb this expansion the diaphragm stretches excepting the expansion of the water. As the water cools the diaphragm shrinks back to normal.