Value Collection MDB291 25 Square Plug 1 in Threaded

Product Description

The VALUE COLLECTION MDB291 25 is a 1-inch threaded square plug made from malleable iron with a black finish. It is designed to seal the end of a threaded pipe opening in low-pressure or medium-pressure piping systems. Rated for liquid and gas service at up to 300 psi, this Class 150 fitting meets Schedule 40 pipe thread dimensions. It carries multiple international and domestic certifications including ABNT, EN 10242, FM Approval, GB/T 3287, GB/T 7306.2, ISO 7/1, and cULus Listing. Licensed plumbers, pipefitters, and mechanical contractors install this type of fitting in commercial and industrial piping assemblies.

This square plug is suited for use in residential and commercial gas and liquid piping systems where a threaded pipe end requires a secure, pressure-rated closure. The male threaded connection engages standard NPT or compatible threaded pipe ends. Its malleable iron construction and black finish make it appropriate for dry, interior piping applications such as natural gas distribution, compressed air lines, and general plumbing branch closures. The fitting ships in a package quantity of five units, making it practical for multi-point installations or service van stocking.

Key Features

• Malleable iron construction provides durability under mechanical stress and repeated assembly cycles
• 300 psi liquid and gas pressure rating supports a wide range of service applications
• Class 150 classification and Schedule 40 threading ensure compatibility with standard pipe systems
• Black finish suitable for interior dry piping environments
• Certified to ABNT, EN 10242, FM, GB/T 3287, GB/T 7306.2, ISO 7/1, and cULus standards
• Package quantity of 5 units for multi-point service needs

Compatibility

Designed as an OEM-style replacement or new-installation fitting for Class 150 malleable iron threaded pipe systems, compatible with Schedule 40 threaded pipe ends in standard NPT or equivalent configurations.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local mechanical and plumbing codes, including IPC and IFGC requirements where gas service is involved. Isolate and depressurize the piping system completely before installing or removing any threaded fittings. Apply an approved thread sealant or PTFE tape to the male threads before engagement. Do not overtighten; use a properly sized pipe wrench and follow standard wrench-tight-plus-turns practice per the sealant manufacturer guidance.