Backflow Preventers | McMaster-Carr

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System of Measurement

Pipe Size

For Use With

Flammable Vapors

Chlorinated Water

Deionized Water

Body Material

Stainless Steel

Fitting Connection

Push to Connect

Thread Type

UN/UNF (SAE Straight)

Minimum Opening Pressure

Connects To

Mounting Position

Valve Type

Reduced Pressure Zone

Maximum Pressure @ Temperature

50 psi @ 65° F

15 psi @ 70° F

25 psi @ 70° F

115 psi @ 70° F

125 psi @ 70° F

145 psi @ 70° F

150 psi @ 70° F

200 psi @ 70° F

220 psi @ 70° F

275 psi @ 70° F

300 psi @ 70° F

400 psi @ 70° F

500 psi @ 70° F

600 psi @ 70° F

1,000 psi @ 70° F

Gender

Shape

Seal Material

Stainless Steel

Check Valve Type

Spring-Loaded Ball

Spring-Loaded Piston

Actuation

End-to-End Length

Maximum Temperature

Less than 200° F

200° F to 249° F

250° F to 299° F

300° F to 499° F

500° F or greater

Fitting Type

Tube OD

Connection Port

DFARS Specialty Metals

REACH

Export Control Classification Number (ECCN)

RoHS

Compliant with Exemptions

Piston Material

Stainless Steel

How can we improve?

1,005 Products

Fluid Handling

Backflow-Prevention Valves

Backflow-Prevention Valves

Dual checks stop flow from reversing and contaminating your system

Check Valves

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

Vacuum Breakers

Vacuum Breakers

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

Sump Pump Backflow-Prevention Valves

Sump Pump Backflow-Prevention Valves

Block dirty water from returning to your sump pump

Flame Arresters

Flame Arresters

Absorb heat from a fire in your gas pipeline to stop it from traveling back to the gas source

Power Transmission

Hydraulic Check Valves

Hydraulic Check Valves

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

Air Flow Check Valves

Air Flow Check Valves

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

Fastening and Joining

Welding Gas Flashback Arresters

Welding Gas Flashback Arresters

Attach to your gas welder to extinguish flames and stop reverse gas flow

Facility and Grounds Maintenance

Drain Check Valves

Drain Check Valves

Prevent water damage by placing into floor drains to stop sewer back-ups

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