Anvil 0310069604 Malleable Iron Cross Class 150 Trap

Anvil Malleable Iron Cross 300 psi

The Anvil 0310069604 is a malleable iron cross fitting rated Class 150 for Schedule 40 pipe. It provides four female NPT ports, each sized at 3/8 inch. The fitting handles a maximum operating pressure of 300 psi at 150 degrees Fahrenheit. It suits plumbing systems requiring a four-way junction in a durable iron body.

Upgrading from plastic or lower-pressure fittings

This cross replaces plastic or lower-rated metal tees when a four-outlet layout is needed at higher pressure. The jump is worth it when the system runs near 300 psi or at elevated temperature up to 150 degrees Fahrenheit. It also fits existing Schedule 40 piping without adapter changes. Installers who need a single robust junction instead of multiple couplings will benefit.

Limits of Class 150 NPT threads

The Class 150 rating caps pressure at 300 psi at the stated temperature; higher pressures or temperatures exceed the design envelope. Female NPT threads require sealant or tape and careful torque to avoid leaks or cracked ports. The 3/8 inch port size restricts flow capacity compared to larger-bore crosses. Systems needing greater throughput or different thread standards cannot use this fitting directly.