Anvil 0318900529 Malleable Iron Pipe Cap 1/2 in Threaded

Product Description

The ANVIL 0318900529 is a Class 150 malleable iron threaded pipe cap with a black finish, rated for use in steam, liquid, and gas piping systems. Sized at 1/2 inch with NPT threads, this cap seals the end of a pipe run or temporarily closes off a branch line. At 0.12 pounds, it is a compact fitting suited for tight spaces in mechanical rooms, utility chases, and process piping. Licensed plumbers and pipefitters install this fitting where a durable, code-compliant termination is required on a threaded iron pipe system.

This cap is used in residential and light commercial plumbing, steam distribution, hydronic heating, gas distribution, and compressed air piping. The malleable iron construction handles the thermal cycling common in steam and hot-water systems. The black finish is standard for gas and steam piping applications where a galvanized fitting is not specified. It installs on any standard 1/2 inch NPT threaded pipe end.

Key Features

• Class 150 pressure rating: 150 psi for steam, liquid, and gas service
• Malleable iron construction for durability under thermal cycling
• Threaded connection (NPT) for fast, tool-only installation
• Black finish standard for gas and steam piping applications
• 1/2 inch fitting size for common residential and light commercial pipe runs
• Lightweight at 0.12 pounds — easy to stock and handle in the field

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 1/2 inch NPT threaded iron pipe systems rated at Class 150.

Installation Notes

Installation is performed by a licensed plumber or pipefitter following applicable IPC or IFGC requirements for the service type. Shut off and depressurize the pipe system fully before threading on the cap. Apply an appropriate thread sealant or PTFE tape to the male threads before installation. Do not over-torque malleable iron fittings, as the material can crack under excessive force.