Bk Mueller 521-952HC Threaded Bushing 1 X 3/8 in

Product Description

The BK MUELLER 521-952HC is a black malleable iron threaded bushing used to reduce pipe fittings from a 1-inch female thread to a 3/8-inch male thread. It carries a Class 150 pressure rating and is suitable for liquid and gas service up to 300 psi. The black finish is applied for corrosion resistance in standard service environments. This bushing is installed by licensed plumbers, pipefitters, and gas service technicians working on threaded iron pipe systems.

This bushing fits into residential and light commercial piping applications where a threaded reducer is needed between a 1-inch fitting and a 3/8-inch branch or component. Common install scenarios include gas supply lines, compressed air distribution, and water supply piping where malleable iron fittings are specified. Its Class 150 rating makes it appropriate for standard service pressures found in most residential and commercial mechanical systems.

Key Features

• Malleable iron construction for strength and durability in threaded pipe systems
• Black finish for corrosion resistance in standard service conditions
• Class 150 rated with a 300 psi liquid and gas pressure rating
• Threaded end connections on both ends for standard NPT installation
• Reduces from 1-inch female thread to 3/8-inch male thread

Compatibility

Designed as an OEM-style replacement or new-installation fitting for standard threaded malleable iron pipe systems rated at Class 150 service conditions.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing and mechanical codes, including IFGC requirements when used on gas lines. Shut off gas or water supply and depressurize the line completely before removing or installing any fitting. Apply appropriate thread sealant or PTFE tape to male threads before assembly. Do not overtighten threaded connections, as malleable iron fittings can crack under excessive torque.