We are supplying all kinds of Horizontal Check Valve, Vertical Check Valves, Foot Valve and Bottom Valves. Usually we call them swing check valve and spring check valve. The check valves with brass color, plastic core or brass core. The brass check valve size from 1/2” to 4”. The check valve thread standard: ISO228/ISO7. The material of foot valve and bottom valve have brass and zinc-alloy available. The foot valve and bottom valve is BSPT and NPT thread.