Check valves are automatic one-way flow control valves that open under forward pressure and close immediately when flow stops or reverses — protecting pumps, equipment, and processes from backflow, siphoning, and contamination. Unlike ball valves or gate valves, check valves require no operator action; they respond to flow conditions automatically.
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2-1/2 in. Brass Swing Check Valve (940358) -
2-1/2 in. Brass Y-Pattern Check Valve, Threaded (NPT) (940358B) -
2-1/2 in. Ductile Iron Double Door Wafer Check Valve | 963025 -
3 in. Brass Inline Check Valve, Buna-N | 944410 -
3 in. Brass Inline Check Valve, Viton | 944410V -
3 in. Lead-Free Brass Check Valve, IPS Threaded | 944437LF -
3 in. Lead-Free Brass Swing Check Valve, IPS Threaded | 940359LF -
3 in. Ductile Iron Swing Check Valve, Flanged — AWWA C508 (962003) -
3 in. Ductile Iron Swing Check Valve, Lever & Weight — AWWA C508 (96203LW) -
3 in. Brass Swing Check Valve, 200 lb (940359) -
3 in. Ductile Iron Double Door Wafer Check Valve | 963003 -
3 in. Ductile Iron Swing Check Valve, Flanged — UL/FM (96203UL) -
Lever and Weight for 9620 Series Swing Check Valve, 3 in. (RP96203LW) -
Spring Kit for 9620 Series Swing Check Valve, 3 in. (96203SK) -
4 in. Brass Inline Check Valve, Buna-N | 944411 -
4 in. Brass Inline Check Valve, Viton | 944411V -
4 in. Lead-Free Brass Swing Check Valve, IPS Threaded | 940360LF -
4 in. Ductile Iron Swing Check Valve, Flanged — AWWA C508 (962004) -
4 in. Ductile Iron Swing Check Valve, Lever & Weight — AWWA C508 (96204LW) -
4 in. Brass Swing Check Valve, 200 lb (940360) -
4 in. Ductile Iron Double Door Wafer Check Valve | 963004 -
4 in. Ductile Iron Double Door Wafer Check Valve, UL/FM | 963004UL -
4 in. Ductile Iron Swing Check Valve, Flanged — UL/FM (96204UL) -
Lever and Weight for 9620 Series Swing Check Valve, 4 in. (RP96204LW)
