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Galvanised malleable iron straight coupling, 3/4 inch NPT threads both ends

Value Brand

Value Brand Straight Malleable Iron Coupling 3/4" NPT Class 150 5P920

SKU CH-DZS4-S8T61

Malleable iron straight coupling with 3/4 inch NPT female threads on both ends, galvanized for corrosion resistance and rated Class 150 for standard pressure plumbing systems

  • Straight 3/4" NPT threads simplify pipe connections
  • Malleable iron construction withstands 150 class pressure demands
  • Galvanised finish resists corrosion in plumbing systems
  • Female threaded ends enable secure joint assembly
  • California Proposition 65 chemical warning applies to this item

Straight Malleable Iron Coupling

This straight coupling connects two 3/4 inch NPT threaded pipes in a straight line. It is made from galvanized malleable iron rated for Class 150 service. The fitting suits plumbing installations that require a rigid, permanent joint between female-threaded ends.

Galvanized Class 150 Construction

The galvanized coating protects the iron from corrosion in water and air lines. Malleable iron provides mechanical strength for threaded connections that must resist vibration and pressure cycling. Female threads on both ends accept standard male NPT pipe nipples or fittings without adapters.

Replaces Worn or Leaking Threaded Couplings

Use this coupling to replace a cracked, corroded or stripped fitting in an existing 3/4 inch NPT line. The jump is worth it when the old joint leaks under pressure or when threads no longer seal with tape or compound. It restores a secure, code-compliant connection for Class 150 rated systems.

How it compares

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

Price $1.99
Cheaper than about 94% of the 2,955 comparable items (median $17.99).

Specifications

Product
Brand nameZoro Select

Questions about this item

What thread standard does the 3/4" NPT coupling use, and what pressure does Class 150 allow?

The coupling uses 3/4 inch NPT female threads on both ends, and the Class 150 rating sets the maximum working pressure for the fitting.

What pipe size and material match the coupling for a proper fit?

It fits 3/4 inch NPT male-threaded pipe, and the malleable iron body with galvanized finish is made to join iron or steel piping.

How do you install the coupling, and what step prevents leaks?

Apply thread sealant or tape to the male threads, thread the coupling on by hand, then tighten with a wrench; the step often missed is using enough sealant on every thread.

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