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Half-inch red brass pipe flange with four bolt holes

Value Brand

Value Brand 1/2" FNPT Red Brass Flange Class 125 125 psi

SKU CH-4PHY-8Z6XF

Red brass pipe flange with four bolt holes, rated 125 psi from -20 to 400 °F

  • Fits 1/2 in FNPT piping with Class 125 rating
  • Withstands 125 psi at temperatures up to 400 degrees F
  • Red brass body meets ASME B16.15 and ASTM B584 standards
  • Four-hole flange pattern aligns to ANSI B1.20.1 dimensions
  • Prop 65 warning for chemical exposure awareness

Flange for 1/2" pipe systems

This red brass flange uses FNPT threads to join a half-inch pipe in residential or light-commercial plumbing. The Class 125 rating supports up to 125 psi, and the material meets ASTM B584 for corrosion resistance. It suits installers who need a standard four-hole pattern for bolting to a mating surface. Buyers needing a larger bore or a different thread standard should look elsewhere.

Four-hole pattern and standards compliance

The flange carries four bolt holes on a 53/64 in outside diameter, matching ANSI B1.20.1, ASME B16.15 and ASME B16.24. Those standards ensure the bolt circle and thread form line up with common companion flanges and valves. No gaskets, bolts or sealant are included, so the installer must supply them separately. The California Proposition 65 notice applies to the brass alloy itself.

Red brass body rated to 400 °F

The casting handles temperatures from minus 20 °F to 400 °F, covering hot-water heating as well as cold-water lines. Red brass resists dezincification better than yellow brass, extending service life in aggressive water. The 3 1/2 in face-to-face length fits standard Class 125 piping layouts without special spacers. Installers who require a different pressure class or a weld-end connection will need another fitting.

How it compares

Measured against everything we stock in Bath Accessories & Soap Dispensers, at today’s prices. Recalculated every night.

Price $26.99
Cheaper than about 63% of the 1,499 comparable items (median $39.99).

Specifications

Product
Brand nameZORO SELECT
Product typeOther

Questions about this item

Will the red brass flange need replacement due to corrosion or wear over time?

Red brass construction resists corrosion in water supply systems; replacement is only needed if physical damage occurs or if the 125 psi pressure rating is exceeded during service.

What pressure limit will be reached first under continuous operation?

The flange is rated for a maximum of 125 psi; sustained pressure above this value is the primary limit that would require system redesign or component upgrade.

Does the flange generate heat or noise when water flows through it all day?

As a passive brass fitting with no moving parts, it produces no operational noise and negligible heat; the material handles continuous flow from -20 to 400 degrees F without thermal issues.

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