Bell & Gossett HFT Expansion Tanks are used for residential and light commercial applications. Thermal expansion tanks absorb the force of thermal expansion in hydronic heating systems. Steel 1/2" NPTM system connection. The heavy duty butyl diaphragm separates system water from the air in the tank preventing water logging problems. Provides a maximum working pressure up to 100 psi at a maximum temperature of 240°F.
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