Bladder expansion save 60% energy more than the diaphragm tank The 6.6 gal. Solar heating tank best to save energy. Max working temperature 250°F and Max working pressure 120 psi. It can be used in Residential and commercial water heater system. The heat loss in expansion vessels with diaphragm membrane is 60% higher compared to balloon membrane Varem vessels. Expansion vessels for closed heating systems required to compensate for thermal expansion in the water volume caused by temperature increase.

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