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Brass inline check valve with push-to-connect tube fitting and threaded male end

Legris

Legris 7985 56 11 1/4" Tube x 1/8" MNPT Check Valve Trap

SKU CH-2WF7-W7Z8M MPN 7985

Inline check valve with 1/4 in tube and 1/8 in BSPT connections, 3.6 psi cracking pressure, nitrile seals, and -32 to 158 °F operating range

  • TypeDrain Components
  • MaterialHAWA
  • Prevents backflow with 3.6 psi cracking pressure
  • Operates from -32 to 158 Degrees F
  • Nickel-plated brass body resists corrosion
  • Push x BSPT connection fits 1/4 in x 1/8 in
  • Nitrile seal ensures tight shut-off

Inline Check Valve for 1/4" Tube and 1/8" MNPT

This nickel-plated brass and nylon check valve fits 1/4 inch tube by 1/8 inch male BSPT connections. It allows flow in one direction with a cracking pressure of 3.6 psi. The inline body suits horizontal or vertical mounting. The seal and seat use nitrile for compatibility with air or fluid lines.

Temperature and Pressure Limits

The valve operates from -32 °F to 158 °F. Maximum water and steam pressures are not rated by the manufacturer. The low cracking pressure of 3.6 psi means it opens easily but may not hold against high back-pressure. Installers must verify system pressure stays within the unrated limits before use.

Push-to-Connect and Threaded Ends

The push-to-connect tube end speeds assembly without tools. The 1/8 inch BSPT male thread seals with thread tape or compound. Nickel-plated brass resists corrosion in typical shop environments. Nylon components reduce weight. The unit carries a California Proposition 65 warning for chemicals known to cause cancer and reproductive harm.

Highlights

  • Prevents backflow with 3.6 psi cracking pressure
  • Operates from -32 to 158 Degrees F
  • Nickel-plated brass body resists corrosion
  • Push x BSPT connection fits 1/4 in x 1/8 in
  • Nitrile seal ensures tight shut-off

Specifications

TypeDrain Components
MaterialHAWA
BrandLegris
Model7985 56 11

Questions about this item

Should I choose the 7985 56 11 model for a 1/4 inch tube and 1/8 inch MNPT connection?

Yes, the 7985 56 11 is built for a 1/4 inch tube on one side and a 1/8 inch MNPT thread on the other, so it matches that exact plumbing layout.

What does the 3.6 psi cracking pressure mean when the valve is installed in a line?

The valve will stay closed until the upstream pressure exceeds 3.6 psi, then open to allow flow in the permitted direction.

How does the push-to-connect by BSPT interface limit the maximum working temperature?

The seal materials and body are rated for a maximum temperature of 158 degrees F, so the interface should not be used above that limit.

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