Gravity Check Valves | McMaster-Carr

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For Flange Class

Copper Tube Size

164 Products

Check Valves

High-Flow Threaded Check Valves

Internal components reduce flow resistance for the maximum possible flow

67 products

Check Valves with Solder-Socket Fittings

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

7 products

High-Cycling Threaded Check Valves

Few moving parts to wear out from frequent opening, pulsating flow, and rapid reversal

12 products

Socket-Connect Check Valves

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

10 products

Flange-Mount Check Valves

Sandwich between two ANSI flanges for backflow prevention that adds little weight or space

Plastic Socket-Connect Check Valves

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

9 products

Check Valves for Drinking Water

Threaded Check Valves for Drinking Water

Meet NSF/ANSI 61 requirements for drinking water service

11 products

Socket-Connect Check Valves for Drinking Water

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

12 products

Check Valves for Vacuum

Check Valves with Barbed Fittings for Vacuum

Barbs grip onto tubing, providing a secure hold

2 products

Check Valves for Oil and Fuel

Flange-Mount Check Valves for Oil and Fuel

Install between ANSI flanges

6 products

High-Performance Threaded Check Valves for Fuel

Withstand pressures up to 1,975 psi and temperatures up to 800° F

5 products

Socket-Connect Check Valves for Oil and Fuel

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

3 products

Other Products

Backflow-Prevention Valves

Dual checks stop flow from reversing and contaminating your system

5 products