Value Collection 106644 Countersunk Square Plug 1-1/4 in

Product Description

The VALUE COLLECTION 106644 is a countersunk square plug designed to seal threaded pipe openings in plumbing, HVAC, and industrial piping systems. Constructed from malleable iron with a black finish, this plug meets Class 150 standards and carries a liquid and gas pressure rating of 300 psi. The 1-1/4 inch threaded connection allows direct installation into standard female-threaded fittings without additional adapters. Licensed plumbers and pipefitters install this type of plug to cap unused branch outlets, close test ports, or terminate dead-end runs during system commissioning or modification.

This countersunk square plug is suited for residential and light commercial piping applications where a low-profile, flush-seating closure is required. The countersunk head design sits recessed or flush against the fitting face, reducing protrusion in tight spaces. It is commonly used in gas distribution, steam, water, and compressed air piping systems that operate within Class 150 pressure limits. The threaded end connection is compatible with standard NPT female threads at 1-1/4 inch nominal pipe size.

Key Features

• Malleable iron construction provides durability in moderate-pressure piping systems
• Black finish suitable for gas and steam service applications
• Rated to 300 psi for liquid and gas service
• Class 150 classification for use in standard low-to-medium pressure systems
• Countersunk square head profile for reduced protrusion in confined spaces
• Threaded end connection for direct installation into NPT female fittings

Compatibility

Designed as an OEM-style replacement or standard-stock threaded plug for 1-1/4 inch NPT female-threaded pipe fittings in Class 150 malleable iron piping systems.

Installation Notes

Installation is performed by a licensed plumber or pipefitter using a square-drive or appropriate wrench sized for the countersunk head. Shut off and depressurize the piping system completely before removing or installing any threaded plug. Apply an approved thread sealant or PTFE tape to the male threads before engagement. Follow applicable IPC and IFGC code requirements for pipe thread joint preparation and pressure testing after installation.