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The Watts ETX-30 Expansion Tank is used in closed loop hydronic heating systems in both commercial and residential applications. This steel tank is installed into the supply piping to control the thermal expansion of hot water and maintain a pressure level below the system's relief valve setting. This ETX Series 4.5 gallon tank is made of carbon steel with a gray epoxy finish and features a rugged butyl diaphragm. It is precharged to 12 PSI and has a 1/2" MNPT pipe connection.
Dimensions: 11" diameter x 14" height
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