Sioux Chief 695 Series PrimePerfect trap primer valves shall be used where replenishment of water in floor drain traps is required. Trap primer valve shall be ½" FIP inlet × ½" MIP outlet. Automatic trap primer valve shall activate with a 10 PSIG pressure drop between 30–150 PSIG. Water release shall be factory set. Trap primer valve shall have large port openings. Trap primer valve shall be UPC/IAPMO listed, and ASSE certified to the ASSE 1018 standard.