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Small galvanised malleable iron pipe coupling with female NPT threads

Value Brand

Value Brand Malleable Iron Coupling 3/8 NPT Class 150

SKU CH-NRX8-N3ETG

A Class 150 malleable iron coupling joins two 3/8 inch NPT female threads in plumbing systems

  • Malleable iron construction provides durable Class 150 pressure rating
  • Galvanized coating resists corrosion in plumbing applications
  • Female NPT threads on both ends simplify pipe connections
  • 3/8 inch nominal size fits standard piping systems
  • Ships free on orders over 75 from Zoro

Malleable Iron Coupling 3/8 NPT

This galvanised malleable iron coupling connects two 3/8 inch NPT female threads in a straight line. It is rated for Class 150 service and suits standard plumbing installations. The fitting is supplied new and carries the ZORO SELECT branding.

Thread and pressure compatibility

Verify that both mating ports are 3/8 inch NPT female before ordering. Confirm the system operating pressure does not exceed the Class 150 rating for the intended temperature range. Check local codes for any restrictions on malleable iron fittings in potable water lines.

Installers needing a straight 3/8 NPT join

This coupling suits plumbers and maintenance crews joining two female NPT ends of the same size. It is not intended for applications requiring a reducing connection, a different thread standard, or a higher pressure class than Class 150. Buyers who need those variants should select an alternative fitting.

How it compares

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

Price $1.55
Cheaper than about 96% of the 2,955 comparable items (median $17.99).

Specifications

Product
Brand nameZORO SELECT

Questions about this item

Does the box contain only the galvanized malleable iron coupling or are seals and thread tape included?

The package supplies the single Class 150 coupling with 3/8 in female NPT threads on both ends; gaskets and thread sealant must be purchased separately.

Is there a larger NPT size or a different pressure class available under the same ZORO SELECT 5P918 line?

The 5P918 designation identifies this exact 3/8 in NPT Class 150 fitting; other sizes or classes carry different part numbers.

What does the Class 150 rating mean when the coupling is installed in a water supply line?

Class 150 indicates a maximum working pressure of 150 psi at ambient temperature for this galvanized malleable iron coupling.

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