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The SIOUX CHIEF 648XG3XRV is a valve designed for controlling increased pressure caused by thermal expansion in water distribution systems. It features a brass valve body with PTFE seats, stainless steel springs, and EPDM o-rings. The valve has a 3/4" PEX crimp inlet and outlet, along with a 1/2" PEX crimp relief valve connection.
This thermal expansion relief valve is designed to prevent explosions or damage to water heaters and surrounding structures.
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