1 1/4 Check Valves | McMaster-Carr

Filter by

Pipe Size

Body Material

Stainless Steel

For Use With

Deionized Water

Ethylene Glycol

Hydrochloric Acid

Isopropyl Alcohol

Mineral Spirits

Fitting Connection

Minimum Opening Pressure

Thread Type

Mounting Position

Actuation

Check Valve Type

Spring-Loaded Ball

Spring-Loaded Piston

Fitting Type

Connects To

Valve Type

Reduced Pressure Zone

Maximum Pressure @ Temperature

25 psi @ 70° F

125 psi @ 70° F

150 psi @ 70° F

200 psi @ 70° F

300 psi @ 70° F

400 psi @ 70° F

600 psi @ 70° F

1,000 psi @ 70° F

720 psi @ 100° F

1,975 psi @ 100° F

200 psi @ 150° F

300 psi @ 150° F

400 psi @ 150° F

600 psi @ 150° F

400 psi @ 170° F

Gender

Seal Material

Stainless Steel

Pressure Class

Maximum Temperature

Less than 250° F

300° F to 399° F

400° F to 499° F

500° F or greater

Disc Material

316 Stainless Steel

End-to-End Length

Shape

Flow Coefficient (Cv)

Color

DFARS Specialty Metals

Export Control Classification Number (ECCN)

REACH

RoHS

How can we improve?

39 Products

Fluid Handling

Check Valves

Permit flow in only one direction by closing when flow stops or reverses

Sump Pump Backflow-Prevention Valves

Sump Pump Backflow-Prevention Valves

Block dirty water from returning to your sump pump

Backflow-Prevention Valves

Backflow-Prevention Valves

Dual checks stop flow from reversing and contaminating your system

Vacuum Breakers

Vacuum Breakers

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

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)