Bk Mueller 511-808HN Malleable Iron Square Plug 2 in

Product Description

The BK MUELLER 511-808HN is a 2-inch malleable iron square head pipe plug with threaded end connection, designed to close off open pipe ends in gas, liquid, and steam distribution systems. Rated at 300 psi for liquid and gas service and 150 psi for steam, it meets Class 150 pressure standards. The galvanized finish provides corrosion resistance in exposed or moderately harsh environments. Licensed plumbers and pipefitters install this fitting during new construction, maintenance shutdowns, or system modifications where a port needs to be sealed securely and reliably.

This square plug is suited for residential and light commercial plumbing, gas distribution, and steam piping applications. The 2-inch threaded connection makes it compatible with standard NPT pipe fittings of the same nominal size. It is commonly used to cap test ports, unused tee branches, or temporary access points in iron pipe systems where system pressure must be maintained.

Key Features

• Malleable iron construction delivers strength and resistance to mechanical stress in pressurized pipe systems
• Galvanized finish resists corrosion in plumbing and gas piping environments
• 300 psi liquid and gas pressure rating suitable for a wide range of service conditions
• 150 psi steam pressure rating meets Class 150 standards
• Threaded end connection for straightforward installation with standard NPT fittings
• 2-inch fitting size covers large-diameter branch closures and test port sealing

Compatibility

Designed as an OEM-style replacement or new-installation fitting for Class 150 malleable iron threaded pipe systems in plumbing, gas, and steam service.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable codes such as the IPC or IFGC. Shut off and depressurize the system completely before removing or installing any pipe plug. Apply appropriate thread sealant or PTFE tape to the male threads before tightening. Do not over-torque malleable iron fittings, as the material can crack under excessive force.