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Amtrol EXTROL 15
2 Gallon Bladder-Type Expansion Tank

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$46.99
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An expansion tank is a required component for all hot water boiler systems, and is designed to control system pressure and help reduce energy consumption of heating and circulating operations. These Amtrol expansion tanks are factory pre-charged and 100% tested to keep the diaphragm flush against the tank when the system is first filled with cold water. As the system water temperature increases, the expanded water is absorbed by the tank. As the system water temperature reaches its maximum, the diaphragm flexes against the air cushion to allow for the increased water expansion. These expansion tanks feature a Butyl/EPDM diaphragm for superior air retention, nine times better than natural rubber.

 

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