Description : 2621007G Utility ball valves. PVC with EPDM o-ring seal; threaded ends; PVC gray. Size: 3/4-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.