Sioux Chief 648 Series Thermal Expansion Relief Valve. 3/4" FIP Swivel Inlet x 3/4" MIP Thread Outlet x 1/2" PEX Crimp Relief Valve.
This product shall be used to provide means for controlling increased pressure caused by thermal expansion in water distribution systems. Thermal expansion relief valve shall discharge water and excess pressure as needed to prevent explosions or other damage to the water heater or surrounding structure. Discharged water shall be directed through an outlet line to the floor drain or water heater pan. Valve connections shall conform to appropriate standards including ASTM fitting end specifications.
Brass valve body. Material is C69300 and C46500. Brass is dezincification and SCC resistant, and is compliant with NSF-61 Annex G and California No Lead Plumbing Law.