Solar Water Heater Expansion Tank are an integral safety device for every solar heating project. Solar Water Heater Expansion tank constants the pressure of system and extending the life of all major components. Tanks are buit with an EPDM heat-resistant diaphragm and a stainless connector with patented Leak Safe Technology. The diaphragm has maximum working temperature of 265 F and constants solar fluid at a steady position when it is heated. Depends on system pressure, collector area, system volume and static height of the system we can supply different volume of size.