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Malleable iron reducer coupling, 1 inch by 3/8 inch FNPT, Class 300

Anvil

Anvil 0310542808 Reducer Coupling Class 300 1 in x 3/8 in

SKU CH-MM09-RZKGA MPN 0310542808

A malleable iron reducer coupling rated Class 300 joins 1 in and 3/8 in FNPT pipe, meeting ASME B16.3 with UL listing and FM approval for 2000 psi at 150 °F and 300 psi saturated steam at 550 °F

  • TypeDrain Components
  • Malleable iron construction handles 2000 psi at 150 degrees F
  • Class 300 rating supports saturated steam at 300 psi up to 550 degrees F
  • FNPT threaded ends connect 1 inch to 3/8 inch pipe sizes
  • Meets ASME B 16.3 and carries FM Approved, UL Listed, AAR Approved markings
  • Temperature range from -20 to 550 degrees F covers broad service conditions

Product Identity

The Anvil 0310542808 is a malleable iron reducer coupling designed for plumbing and industrial piping systems. It connects pipes of different diameters in drain and trap installations where a secure threaded joint is required.

Critical Specification

This coupling carries a Class 300 rating with a maximum pressure of 2000 psi at 150 degrees F and a saturated steam pressure of 300 psi at 550 degrees F. The temperature range extends from -20 degrees to 550 degrees F, and the fitting meets ASME B 16.3 with AAR, FM and UL approvals.

Included Benefits

The FNPT threaded ends allow direct assembly without welding or special tools, reducing installation time on site. Malleable iron construction provides mechanical strength for high-pressure service while the listed certifications support code compliance in regulated piping projects.

Highlights

  • Malleable iron construction handles 2000 psi at 150 degrees F
  • Class 300 rating supports saturated steam at 300 psi up to 550 degrees F
  • FNPT threaded ends connect 1 inch to 3/8 inch pipe sizes
  • Meets ASME B 16.3 and carries FM Approved, UL Listed, AAR Approved markings
  • Temperature range from -20 to 550 degrees F covers broad service conditions

Specifications

TypeDrain Components
BrandAnvil
Model0310542808

Questions about this item

What does the 2000 psi rating mean when the fitting is installed in a working system?

It is the maximum non-shock pressure the coupling can handle at 150 °F, so the system design must keep operating pressure below that limit.

How does the FNPT thread standard affect what pipe can be connected?

The Female National Pipe Taper threads accept 1 in and 3/8 in male NPT pipe ends, sealing on the taper without a separate gasket.

What clearance is needed to thread the coupling onto the pipe?

A standard pipe wrench fits the malleable-iron hex; allow enough swing radius to make up the tapered threads fully.

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