Bk Mueller 511-330HC Reducing Coupling 1/2x1/8 in

Product Description

The BK MUELLER 511-330HC is a malleable iron threaded reducing coupling designed for joining pipes of two different diameters in pressurized piping systems. Rated at 300 psi for liquid and gas service and 150 psi for steam, this Class 150 fitting handles demanding service conditions in both residential and light commercial installations. The galvanized finish provides corrosion resistance. Connecting a 1/2-inch line to a 1/8-inch line, it is installed by licensed plumbers and pipefitters wherever a diameter transition is needed in a threaded iron pipe assembly.

This reducing coupling is suited for use in plumbing, HVAC hydronic, gas distribution, and steam piping systems where a transition from 1/2-inch to 1/8-inch pipe is required. Its threaded end connections comply with standard NPT pipe thread configurations, making it compatible with other threaded malleable iron and black iron fittings. It is commonly found in boiler rooms, mechanical rooms, and utility piping runs in residential and commercial buildings.

Key Features

• Malleable iron construction for strength and durability in pressurized piping
• Galvanized finish for corrosion resistance in wet or humid environments
• Rated 300 psi for liquid and gas service
• Rated 150 psi for steam service
• Threaded end connections for standard NPT pipe assembly
• Class 150 fitting classification for broad system compatibility

Compatibility

Designed as an OEM-style replacement or new-installation fitting for threaded malleable iron pipe systems requiring a 1/2-inch to 1/8-inch reducing connection.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing codes and the International Plumbing Code (IPC) or International Fuel Gas Code (IFGC) where applicable. Shut off and depressurize the system completely before removing or installing any fitting. Apply appropriate pipe thread sealant or PTFE tape to male threads before assembly. Do not overtighten threaded connections, as malleable iron fittings can crack under excessive force.