Plastic Check Valves | McMaster-Carr

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424 Products

Check Valves

High-Flow Threaded Check Valves

Internal components reduce flow resistance for the maximum possible flow

10 products

Check Valves with Barbed Fittings

Barbs grip onto tubing, providing a secure hold

71 products

Threaded Check Valves

Open to allow flow in one direction and close when flow stops or reverses

16 products

Check Valves with Push-to-Connect Fittings

Insert tubing into the fitting without needing heat, solder, or flux

63 products

Socket-Connect Check Valves

Insert unthreaded pipe into the socket ends and weld to create a permanent, leak-tight connection

10 products

Plastic Threaded Check Valves

Plastic provides a lightweight alternative to metal

10 products

Compact Plastic Threaded Check Valves

1 1/2" long or less so they fit in confined spaces

5 products

High-Cycling Check Valves

Resist wear from frequent operation so they can cycle as often as once per second

32 products

Plastic Socket-Connect Check Valves

Bond to unthreaded pipe with primer and cement for a permanent, leak-tight connection

9 products

Clear-View Socket-Connect Check Valves

Inspect flow and debris accumulation through the transparent valve body

6 products

Check Valves with Luer Lock Fittings

Consist of a plug and a socket so you can easily connect and disconnect your line with a half turn

4 products

Check Valves for Harsh Chemicals

Easy-Install Threaded Check Valves for Harsh Chemicals

Reduce installation time and allow for maintenance without detaching pipe connections

19 products

Threaded Check Valves for Harsh Chemicals

Open to allow flow in one direction and close when flow stops or reverses

10 products

Check Valves with Push-to-Connect Fittings for Harsh Chemicals

Insert tubing into the fitting without needing heat, solder, or flux

1 product

Socket-Connect Check Valves for Harsh Chemicals

Insert unthreaded pipe into the socket ends and weld to create a permanent, leak-tight connection

11 products

Check Valves with Barbed Fittings for Harsh Chemicals

Barbs grip onto tubing, providing a secure hold

7 products

Ultra-Chemical-Resistant Threaded Check Valves

A PFA body withstands methyl ethyl ketone, sodium hypochlorite, and other harsh chemicals

5 products

Flanged Check Valves for Harsh Chemicals

Bolt to ANSI flanges

2 products

Clear-View Socket-Connect Check Valves for Harsh Chemicals

Inspect flow and debris accumulation through the transparent valve body

3 products

Check Valves for Vacuum

Threaded Check Valves for Vacuum

Prevent vacuum loss with these airtight, leakproof valves

5 products

Check Valves with Barbed Fittings for Vacuum

Barbs grip onto tubing, providing a secure hold

2 products

Check Valves for Drinking Water

Threaded Check Valves for Drinking Water

Meet NSF/ANSI 61 requirements for drinking water service

17 products

Socket-Connect Check Valves for Drinking Water

Bond to unthreaded pipe with primer and cement for a permanent, leak-tight connection

18 products

Heavy Duty Threaded Check Valves for Drinking Water

The metal body makes these more durable than plastic valves for drinking water

11 products

Check Valves with Push-to-Connect Fittings for Drinking Water

Insert tubing into the fitting without needing heat, solder, or flux

8 products

Heavy Duty Check Valves with Push-to-Connect Fittings for Drinking Water

The metal body makes them more durable than plastic valves with push-to-connect fittings

5 products

Check Valves with Solder-Socket Fittings for Drinking Water

Solder to copper tubing for a permanent, leak-tight connection

4 products

Check Valves for Steam

Withstand the high pressures and temperatures in steam service applications

16 products

Check Valves for Food and Beverage

Check Valves with Sanitary Quick-Clamp Fittings for Food and Beverage

Maintain sanitary standards in food, beverage, and dairy applications

12 products

Check Valves for Oil and Fuel

Plastic Threaded Check Valves for Oil and Fuel

Plastic provides a lightweight alternative to metal

13 products

Other Products

Air Flow Check Valves

Open to allow air flow in one direction and close when flow stops or reverses

9 products

Sump Pump Backflow-Prevention Valves

Block dirty water from returning to your sump pump

2 products

Vacuum Breakers

When pressure drops, vents open to prevent suction from drawing liquid back upstream

8 products