Check valves are one-way valves that prevent back flow in piping systems, ensuring fluid moves in only one direction. In industrial, chemical processing, water treatment, and HVAC applications, contractors and purchasing managers rely on high-quality PVC, CPVC, PP, and PVDF check valves for corrosion resistance and reliable performance. ALSCO offers a broad range of sizes, seal materials, and connection types engineered for durability, leak prevention, and consistent flow control. These check valves deliver dependable performance you can trust for critical process, utility, or infrastructure projects.
PVC Ball Check Valve
Sale priceFrom $48.60
CPVC Ball Check Valve
Sale priceFrom $69.30
TC Series True Union Ball Check Valves
Sale priceFrom $57.89
Ball Check Valve, 1/2 in. to 4 in. Sizes, Threaded or Socket, EPDM or FPM, PVC or CPVC
Sale priceFrom $23.00
Type 561 PVC Check Valve
Sale priceFrom $58.39
Check Valve, Clear PVC, 1/2 in. to 1 in. Sizes, Socket, True Union [DISCONTINUED]
Sale priceFrom $22.00
Spring Check Valve, 1/2 in. to 4 in. Sizes, Threaded or Socket
Sale priceFrom $36.13
Utility Swing Check Valve, White PVC, 1/2 in. to 8 in. Sizes, Socket
Sale priceFrom $30.57
Utility Swing Check Valve, White PVC, 1/2 in. to 1-1/2 in. Sizes, Threaded
Sale priceFrom $32.21
Utility Swing Check Valve, Clear PVC, 1/2 in. to 8 in. Sizes, Socket
Sale priceFrom $41.40
Swing Check Valve, Clear PVC, 1/2 in. to 6 in. Sizes, Threaded
Sale priceFrom $41.40
PVC Swing Check Valve
Sale priceFrom $557.00
PP Swing Check Valve
Sale priceFrom $679.00
PVDF Swing Check Valve
Sale priceFrom $1,510.00
Swing Check Valves
Sale priceFrom $130.15
Series CKM Diaphragm Check Valves
Sale priceFrom $101.01
Series CKS Self Closing Check Valves
Sale priceFrom $332.00
1 in. Male X Female NPT PP Mini Check Valve
Sale price$15.31
1/2 in. Poly FPT Check Valve
Sale price$14.54
1 in. Poly FPT Check Valve
Sale price$18.37
2 in. Poly FP NPT Check Valve
Sale price$25.46
3 in. Full Port Check Valve with 1/2 LB Spring
Sale price$37.11
3 in. Full Port Check Valve with 5 LB Spring
Sale price$37.47
Model CVL Epoxy Coated Dual Disc Wafer Check Valves
Sale priceFrom $339.98
Y Check Valve, Clear PVC, 1/2 in. to 3 in. Sizes, Socket or Spigot, EPDM or FPM
Sale priceFrom $71.89
YC Series Y-Check Valve, PVC/FPM, 1/2 in. to 4 in. Sizes
Sale priceFrom $170.49