Midland Industries LF109SD-8 Square Head Solid Plug 1/2 in Mpt

Product Description

The MIDLAND INDUSTRIES LF109SD-8 is a square head solid plug designed to close off open pipe ends in plumbing, HVAC, and gas distribution systems. Manufactured from lead-free brass, this plug meets modern drinking water and potable system requirements. It features a 1/2-inch male pipe thread (MPT) connection with a 1/2-14 thread specification and measures 1.07 inches in length. The square head drive allows installation with a standard wrench or socket, making it a practical choice for tight-access situations. Licensed plumbers and HVAC technicians use this fitting to cap unused branch outlets, seal test ports, or permanently close off service connections.

This solid plug is suited for residential and light commercial piping applications. Its lead-free brass construction makes it appropriate for potable water systems, hydronic heating lines, and compressed air distribution. It is rated for use with brass or steel pipe and is commonly installed during new construction rough-in, system modifications, or when decommissioning branch lines. The 1/2-inch MPT size is one of the most common thread sizes in trade plumbing work, making this plug a standard item for any service truck or supply van.

Key Features

• Lead-free brass construction meets requirements for potable water and drinking water system use
• 1/2 in MPT (male pipe thread) connection with 1/2-14 thread specification
• Square head drive accepts standard wrench or socket for secure installation
• Solid plug design fully closes off pipe ends with no flow path
• Compatible with brass or steel pipe
• Compact 1.07-inch length suits confined installation spaces

Compatibility

Designed for use with brass or steel pipe in 1/2 in MPT applications. Suitable as an OEM-style replacement or new-install plug in potable water, HVAC, and general plumbing piping systems.

Installation Notes

Installation is typically performed by a licensed plumber or HVAC technician. Shut off system pressure and drain the line before removing or installing any pipe plug. Apply thread sealant tape or pipe dope to the male threads per local code requirements before threading into the female fitting. Do not overtighten; use a wrench on the square head and follow applicable IPC or IFGC guidelines for fitting assembly.