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Galvanized floor flange, circular with four bolt holes, zinc-plated finish

Value Brand

Value Brand 1-1/2" FNPT Galvanized Floor Flange 5P971

SKU CH-PREW-FS008

Galvanized malleable iron floor flange with 1-1/2 inch FNPT connection, four bolt holes and 300 psi Class 150 rating

  • Class 150 rating supports 300 psi operating pressure
  • Zinc-plated malleable iron resists corrosion in plumbing systems
  • Four bolt holes simplify secure floor mounting
  • 1-1/2 inch FNPT threads fit standard pipe connections
  • California Proposition 65 chemical warning applies to this product

1-1/2" FNPT Galvanized Floor Flange

The Value Brand floor flange connects a 1-1/2 inch nominal pipe to a flat surface using a female NPT thread. It suits plumbing installers and maintenance crews who need a secure anchor point for pipe runs in commercial or residential systems.

Class 150 pressure rating and zinc-plated iron

The malleable iron body is zinc plated for corrosion resistance and rated for 300 psi maximum operating pressure at Class 150. The four bolt holes distribute load evenly across the 4 1/2 inch outside diameter, keeping joints tight under normal service pressure without excessive stress on fasteners.

Prop 65 notice and restricted-state compliance

California Proposition 65 warnings advise that the product contains chemicals known to cause cancer and birth defects or other reproductive harm. No states are currently restricted from sale, so the flange can be shipped throughout the US where local codes permit its use.

Highlights

  • Class 150 rating supports 300 psi operating pressure
  • Zinc-plated malleable iron resists corrosion in plumbing systems
  • Four bolt holes simplify secure floor mounting
  • 1-1/2 inch FNPT threads fit standard pipe connections
  • California Proposition 65 chemical warning applies to this product

Specifications

BrandZORO SELECT

Questions about this item

How do I install the 1-1/2" FNPT galvanized floor flange and which step causes leaks?

Thread the flange onto a 1-1/2" NPT pipe using pipe-thread sealant or tape, tighten with a pipe wrench, then bolt the 4 1/2" flange to the floor through the four bolt holes; the step most often missed is applying enough sealant on the tapered threads before final tightening.

What maintenance or replacement will the malleable iron zinc-plated floor flange need over time?

Inspect the zinc coating annually for white rust or red rust; if corrosion reaches the base iron, replace the flange because the Class 150 pressure rating can no longer be guaranteed.

What is the first limit reached when the flange runs continuously at its 300 psi maximum operating pressure?

The Class 150 pressure-class ceiling is reached first; sustained operation at 300 psi leaves no safety margin for pressure spikes or temperature-induced stress.

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