This Plumbers Edge PE30 expansion tank is designed for use in closed-loop hydronic heating systems to maintain safe pressure levels. It features a 4.4-gallon capacity and is constructed with a durable steel shell and a heavy-duty butyl diaphragm to separate air from system water. Rated for a maximum working pressure of 100 PSI and a maximum temperature of 240 degrees Fahrenheit, this tank helps prevent relief valve discharge and ensures system longevity

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