Save on the Amtrol ST-5 THERM-X-TROL 140N43 Expansion Tank for Potable Hot Water Systems. The Expansion 2 gallon tank helps in controlling system pressures and helps to reduce energy consumption of heating and circulating operations. The Expansion tank features: Factory pre-charged 40 psig, a 3/4" stainless steel male threaded connection, max temperature rating of 200 F with a max of 150 PSI, this 2 gallon expansion tank has a height of 12 5/8" and a diameter of 8" weighing at 5 pounds, this expansion tank is designed for domestic hot water heating systems that generally contains the following a backflow preventer or a check valve or a pressure reducing valve.
