Anvil 0320200041 Trap — Malleable Iron Merchant Coupling Class 150

What this coupling does

The Anvil 0320200041 is a straight tapped merchant coupling made from malleable iron for Schedule 40 piping systems. It connects two sections of 3/4 inch female NPT pipe in plumbing and industrial installations. The Class 150 rating suits standard pressure requirements in water, air and gas lines. Installers use it where a simple, code-compliant joint is needed.

Build and connection details

The coupling body is steel finished to HAWA specification with a 300 psi maximum operating pressure at 150 degrees Fahrenheit. Both ends are 3/4 inch female NPT threads, so the joint is made by threading pipe directly into each side without adapters. The malleable iron construction resists cracking under vibration and thermal cycling. No gaskets or sealant surfaces are integrated; thread sealant is applied at assembly.

When to choose this over other fittings

This fitting replaces a union or flanged joint where disassembly is infrequent and space is tight. It upgrades from plastic or brass couplings when higher pressure or temperature tolerance is required. The jump is worth it for Schedule 40 steel systems that must meet Class 150 service conditions. It is not for systems needing frequent break-down, welded joints or larger nominal diameters.