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Galvanised malleable iron straight coupling, 3-inch NPT threads

Value Brand

Value Brand Malleable Iron Straight Coupling 3in NPT Class 150

SKU CH-RDV3-X4CHT

Malleable iron straight coupling joins two 3-inch NPT pipes at Class 150 pressure rating

  • Malleable iron construction resists cracking under pressure
  • Galvanised finish protects against rust in wet systems
  • Class 150 rating suits standard low-pressure piping
  • Female NPT threads on both ends simplify installation
  • California Proposition 65 warning notes chemical hazards

3-inch NPT Straight Coupling

This Value Brand malleable iron coupling joins two 3-inch NPT female threads in a straight line. Rated for Class 150 service, it suits water, air or oil lines in commercial and industrial piping systems. The galvanised finish resists corrosion in typical indoor and outdoor installations.

Suitable applications and limits

Plumbers and maintenance crews needing a durable, threaded joint for 3-inch nominal pipe will find this fitting matches the spec. It is not intended for high-pressure hydraulic circuits, steam service above the Class 150 rating or systems requiring welded or flanged connections. Buyers who need a reducing coupling, a different thread standard or a higher pressure class should select another fitting.

California Proposition 65 notice

The product carries a Proposition 65 warning for chemicals known to the State of California to cause cancer and reproductive harm. No additional accessories, sealants or software are bundled with the coupling. Installers must supply compatible thread tape or pipe dope and verify local code requirements before assembly.

Highlights

  • Malleable iron construction resists cracking under pressure
  • Galvanised finish protects against rust in wet systems
  • Class 150 rating suits standard low-pressure piping
  • Female NPT threads on both ends simplify installation
  • California Proposition 65 warning notes chemical hazards

Specifications

BrandZORO SELECT

Questions about this item

What thread standard must the existing pipe have to accept this 3 in NPT coupling?

The connecting pipe needs a matching 3 in NPT female thread for the coupling to seal correctly.

Will this Class 150 galvanized coupling hold up when joined to older black-iron pipe of the same pressure rating?

Yes, the Class 150 rating and NPT threads are compatible with legacy black-iron pipe of the same class.

How can I confirm the joint is sound after I tighten the coupling?

Pressurise the line to its working limit and check for leaks at the threads; a dry joint means the seal is good.

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