We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Galvanized hex bushing with male and female threaded ends

Value Brand

Value Brand 4" MNPT x 1-1/2" FNPT Galvanized Hex Bushing

SKU CH-A580-B0D8A

Galvanised malleable iron hex bushing reduces 4 inch male NPT to 1-1/2 inch female NPT for Class 150 plumbing systems

  • Galvanised malleable iron resists corrosion in water lines
  • Class 150 rating handles standard pressure requirements
  • 4 inch MNPT to 1-1/2 inch FNPT reduces pipe size efficiently
  • Hex profile allows secure tightening with standard wrenches
  • New condition ensures clean threads and full service life

Galvanized Hex Bushing 4" MNPT x 1-1/2" FNPT

This galvanized hex bushing connects a 4-inch male NPT thread to a 1-1/2-inch female NPT thread. It is made from malleable iron with a galvanized finish for corrosion resistance. The fitting carries a Class 150 pressure rating for standard plumbing installations. It suits installers reducing pipe size in water or air lines.

California Proposition 65 compliance

This product contains a chemical known to the State of California to cause cancer and birth defects or other reproductive harm. The galvanized coating protects the malleable iron body during normal handling and service. No thermal, acoustic or electrical power characteristics apply to this passive mechanical fitting. Installers should follow standard safety practices for threaded connections.

Sustained pressure performance in Class 150 service

Under continuous system pressure the bushing maintains its seal within the Class 150 rating limits. The tapered NPT threads on both ends resist loosening from vibration or thermal cycling. The hex profile allows reliable torque application during assembly without rounding. It is not intended for applications exceeding the stated pressure class.

How it compares

Measured against everything we stock in Hose Fittings, Adapters & Clamps, at today’s prices. Recalculated every night.

Price $18.99
Typical for this category: the median of 2,955 items is $17.99.

Specifications

Product
Brand nameZoro Select

Questions about this item

How do I install the 4-inch male NPT end into a female fitting without stripping the threads?

Apply PTFE tape or pipe dope to the male threads, then hand-tighten the bushing before finishing with a wrench on the hex flats; over-tightening past the point of resistance is the common error that damages the galvanized coating.

What maintenance will the galvanized malleable iron bushing need over time?

Inspect the joint periodically for white rust or leakage; if corrosion appears, remove the bushing, clean the threads, and re-seal with fresh tape or compound.

At what pressure does the Class 150 rating become the limiting factor during sustained use?

The fitting is rated for 150 psi working pressure; continuous operation above that level will cause the malleable iron body to fail before the threads do.

More in Hose Fittings, Adapters & Clamps

Similar items