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 price
From $48.60
CPVC Ball Check Valve
Sale price
From $69.30
PP Ball Check Valve
Sale price
From $135.59
PVDF Ball Check Valve
Sale price
$247.52
TC Series True Union Ball Check Valves
Sale price
From $57.89
Ball Check Valve, 1/2 in. to 4 in. Sizes, Threaded or Socket, EPDM or FPM, PVC or CPVC
Sale price
From $23.00
Type 561 PVC Check Valve
Sale price
From $63.36
Check Valve, Clear PVC, 1/2 in. to 1 in. Sizes, Socket, True Union [DISCONTINUED]
Sale price
From $22.00
Spring Check Valve, 1/2 in. to 4 in. Sizes, Threaded or Socket
Sale price
From $36.13
Utility Swing Check Valve, White PVC, 1/2 in. to 8 in. Sizes, Socket
Sale price
From $30.57
Utility Swing Check Valve, White PVC, 1/2 in. to 1-1/2 in. Sizes, Threaded
Sale price
From $32.21
Utility Swing Check Valve, Clear PVC, 1/2 in. to 8 in. Sizes, Socket
Sale price
From $41.40
Swing Check Valve, Clear PVC, 1/2 in. to 6 in. Sizes, Threaded
Sale price
From $41.40
PVC Swing Check Valve
Sale price
From $557.00
PP Swing Check Valve
Sale price
From $679.00
PVDF Swing Check Valve
Sale price
From $1,510.00
Swing Check Valves
Sale price
From $130.15
Series CKM Diaphragm Check Valves
Sale price
From $101.01
Series CKS Self Closing Check Valves
Sale price
From $332.00
1/2 in. Poly FPT Check Valve
Sale price
$14.54
1 in. Male X Female NPT PP Mini Check Valve
Sale price
$15.31
1 in. Poly FPT Check Valve
Sale price
$18.37
2 in. Poly FPT 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 price
From $314.33
Y Check Valve, Clear PVC, 1/2 in. to 3 in. Sizes, Socket or Spigot, EPDM or FPM
Sale price
From $77.35
YC Series Y-Check Valve, PVC/FPM, 1/2 in. to 4 in. Sizes
Sale price
From $170.49