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Brass inline spring check valve with FNPT connections

Campbell

Campbell 4031E 1 in FNPT brass spring check valve bath faucet part

SKU CH-YC41-CG873

Inline spring check valve with brass body, nitrile seal and 18 gpm flow for 1 in FNPT connections

  • TypeOther
  • Prevents backflow with inline spring mechanism
  • Handles 18 gpm flow at .5 psi cracking pressure
  • Lead-free brass body rated for 400 psi water pressure
  • Nitrile seals operate from 35 to 180 Degrees F
  • Installs horizontally or vertically via 1 in FNPT connections

Campbell 4031E Check Valve

The Campbell 4031E is a one-inch FNPT inline spring check valve built from lead-free brass with a bronze seat and stainless-steel spring. It suits residential and light-commercial plumbing systems that need reliable back-flow prevention in horizontal or vertical runs.

Verify pipe size and pressure limits

Confirm your piping uses one-inch FNPT threads and that operating pressure stays at or below 400 psi water. The valve cracks at .5 psi, handles water temperatures from 35 to 180 degrees F, and is not rated for steam service.

Replaces worn or missing brass check valves

Swap out a leaking or seized brass check valve of the same size and connection type to restore positive shut-off. The upgrade is worthwhile when the old unit no longer seals at low cracking pressure or when lead-free materials are required by code.

Highlights

  • Prevents backflow with inline spring mechanism
  • Handles 18 gpm flow at .5 psi cracking pressure
  • Lead-free brass body rated for 400 psi water pressure
  • Nitrile seals operate from 35 to 180 Degrees F
  • Installs horizontally or vertically via 1 in FNPT connections

Specifications

BrandCAMPBELL
TypeOther

Questions about this item

Does the Campbell 4031E check valve include any fittings or pipe sealant in the box?

The item is the valve body only; pipe sealant and any required 1 in FNPT fittings must be purchased separately.

Which cracking-pressure version of the 4031E should I choose for a low-head gravity system?

This model has a fixed .5 psi cracking pressure and is not offered in alternative spring rates.

Will the 18 gpm flow rating be maintained at the 400 psi maximum water pressure?

The 18 gpm figure is the published flow capacity; actual flow will vary with system pressure drop and piping configuration.

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