Valterra 200-15 PVC Swing/Spring Combination Check Valve, White, 1-1/2" Slip Schedule 40 PVC construction for strength and resistance to corrosion and mild chemicals EPDM seal for resistance to water and oils Maximum pressure rating of 150 psi Spring tension of 1/2 lb. for secure closure of valve 1-1/2" slip connections Actuator: 1/2 pound