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A check valve, clack valve, non-return valve or one-way valve is a mechanical device, a valve, which normally allows fluid (liquid or gas) to flow through it in only one direction.

Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of applications. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem. The bodies (external shells) of most check valves are made of plastic or metal.

An important concept in check valves is the cracking pressure which is the minimum upstream pressure at which the valve will operate. Typically the check valve is designed for and can therefore be specified for a specific cracking pressure.

Check Valve Specifications:

  • Vertical and Horizontal
  • High Flow Rates
  • 5 to 400 PSI / 250°F to 400°F
  • 1/8" to 2"
  • Minimum Pressure Check Valve
 Check Valves Combo


























200-3 Horizontal Check Valve

200-3 Horizontal Check Valve

Part #: 1234109
3/8" with Buna N Disc
$61.50
205-5 Horizontal Check Valve

205-5 Horizontal Check Valve

Part #: 1234112
3/4" with Teflon Disc
$129.00
205-6 Horizontal Check Valve

205-6 Horizontal Check Valve

Part #: 1234113
1" with Teflon Disc
$148.50
205A-9 Horizontal Check Valve

205A-9 Horizontal Check Valve

Part #: 1234116
2" with Teflon Disc
$362.00
215A-3 Horizontal Check Valve

215A-3 Horizontal Check Valve

Part #: 1234118
3/8" w/glass filled Teflon Disc
$33.50
217-2 Horizontal Check Valve

217-2 Horizontal Check Valve

Part #: 1234121
1/4" For Liquid
$25.00
217-4 Horizontal Check Valve

217-4 Horizontal Check Valve

Part #: 1234122
1/2" For Liquid
$31.00
226-2-2 Vertical Check Valve

226-2-2 Vertical Check Valve

Part #: 1234123
1/4" X 1/4" Buna N Disc without Port Hole
$16.50
226-3-3 Vertical Check Valve

226-3-3 Vertical Check Valve

Part #: 1234124
3/8" X 3/8" Buna N Disc without Port Hole
$24.50
226-4-4 Vertical Check Valve

226-4-4 Vertical Check Valve

Part #: 1234125
1/2" X 1/2" Teflon Disc without Port Hole
$23.50
226A-2-2 Vertical Check Valve

226A-2-2 Vertical Check Valve

Part #: 1234126
1/4" X 1/4" Teflon Disc with Port Hole
$19.00
226A-3-3 Vertical Check Valve

226A-3-3 Vertical Check Valve

Part #: 1234127
3/8" X 3/8" Teflon Disc with Port Hole
$21.00
226A-4-4 Vertical Check Valve

226A-4-4 Vertical Check Valve

Part #: 1234128
1/2" X 1/2" Teflon Disc with Port Hole
$25.50
226A-5-5 Vertical Check Valve

226A-5-5 Vertical Check Valve

Part #: 1234129
3/4" X 3/4" Teflon Disc with Port Hole
$33.50
226T-3-3 Vertical Check Valve

226T-3-3 Vertical Check Valve

Part #: 1234131
3/8" X 3/8" Teflon Disc without Port Hole
$34.00
227F-2-2 Vertical Check Valve

227F-2-2 Vertical Check Valve

Part #: 1234133
1/4" X 1/4" Teflon Disc
$15.50
Conrader CTB11 In-Tank Check Valve (OEM)

Conrader CTB11 In-Tank Check Valve (OEM)

Part #: CTB11
1" X 1" NPT with Port Hole
$40.00
Conrader CTB114114 In-Tank Check Valve (OEM)

Conrader CTB114114 In-Tank Check Valve (OEM)

Part #: CTB114114
1-1/4" X 1-1/4" NPT with Port Hole
$60.00
Conrader CTB1234 In-Tank Check Valve (OEM)

Conrader CTB1234 In-Tank Check Valve (OEM)

Part #: CTB1234
1/2" X 3/4" NPT with Port Hole
$20.00
Conrader CTB341 In-Tank Check Valve (OEM) Conrader CTB341 In-Tank Check Valve (OEM)

Conrader CTB341 In-Tank Check Valve (OEM)

Part #: CTB341
3/4" NPT x 1" NPT with Port Hole
$30.00

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Check Valves