Spears 162A-012 PVC Schedule 80 Y-Check Valves PVC Y-check valve Socket ends; EPDM Size: 1-1/4-inch Schedule 80 PVCs are thicker, stronger, will handle higher pressures, and endure colder climates than Schedule 40 PVCs Schedule 80 PVCs: not for Compressed Air or Gas; conforms to ASTM D 1785; fittings conform to ASTM D 2467; threaded fittings conform to ASTM D 2464