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
Malleable iron union, Class 150, 3/4 in and 1/2 in NPT female threads

Anvil

Anvil 312822109 Malleable Iron Union Class 150 3/4 in 1/2 in NPT

SKU CH-8GE4-JWKYG

Malleable iron union connects 3/4 in and 1/2 in NPT pipe ends at Class 150 pressure rating

  • Malleable iron construction resists cracking under pressure
  • Class 150 rating handles 300 psi at 150 °F
  • Reducing design joins 3/4 in and 1/2 in NPT threads
  • Schedule 40 compatibility fits standard piping systems

Anvil Malleable Iron Union Class 150

This malleable iron union connects 3/4 inch and 1/2 inch female NPT threads. It is rated for Schedule 40 pipe and a maximum operating pressure of 300 psi at 150 degrees Fahrenheit. The Class 150 fitting suits residential and light commercial plumbing installations requiring a secure, removable joint.

Replaces worn or mismatched threaded unions

Use this union when joining pipes of different NPT sizes in a straight line. The malleable iron construction handles standard water, oil, or air lines within the rated pressure and temperature range. It is not suited for high-pressure hydraulic systems, applications exceeding 300 psi, or environments requiring corrosion-resistant alloys such as stainless steel or bronze.

Highlights

  • Malleable iron construction resists cracking under pressure
  • Class 150 rating handles 300 psi at 150 °F
  • Reducing design joins 3/4 in and 1/2 in NPT threads
  • Schedule 40 compatibility fits standard piping systems

Specifications

BrandANVIL

Questions about this item

What pipe schedule does the 3/4 in NPT end of this union accept?

The union is rated for Schedule 40 pipe on both the 3/4 in and 1/2 in NPT ends.

How is the union assembled, and which step is commonly missed?

Thread each NPT end into the piping, then draw the union nut up by hand before final tightening with a wrench; skipping the hand-tight step can cross-thread the malleable iron seats.

More in Fittings & Couplings

Similar items

Same shelf, same checkout — eight coins and a 30-minute rate lock.