Value Collection MDB240 20X15-5 Reducing Coupling 3/4x1/2

Product Description

The VALUE COLLECTION MDB240 20X15-5 is a black malleable iron reducing coupling designed for threaded pipe systems operating with liquids or gases. It reduces a 3/4-inch line down to a 1/2-inch connection using National Pipe Taper threads, conforming to GB/T 7306.2 and ISO 7/1 thread standards. Rated at 300 psi and classified as Class 150, this coupling suits moderate-pressure distribution piping where a reliable, leak-resistant threaded joint is required. The black finish is standard for gas-service piping. Plumbers, pipefitters, and mechanical contractors install this fitting in a wide range of commercial and residential applications.

This reducing coupling is suited for use in natural gas, propane, water, and general fluid distribution systems where a Schedule 40 threaded reduction is needed. Its malleable iron construction handles the mechanical stress of threaded assembly without cracking or distorting, making it appropriate for both new installations and retrofit work on existing threaded pipe runs. Typical install locations include branch connections in boiler rooms, mechanical rooms, and utility piping rough-ins.

Key Features

• Reduces 3/4-inch to 1/2-inch threaded connections in a single fitting
• 300 psi liquid and gas pressure rating
• Class 150, Schedule 40 classification for standard-pressure piping systems
• Malleable iron construction for durability under threaded assembly torque
• Black finish suitable for gas-service piping identification
• Conforms to GB/T 7306.2 and ISO 7/1 thread standards

Compatibility

Designed as an OEM-style replacement or new-installation fitting for Schedule 40 threaded malleable iron pipe systems in residential and commercial plumbing, HVAC, and gas distribution applications.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing codes and IFGC requirements. Shut off and depressurize the pipe system fully before disassembling or adding fittings. Apply an appropriate thread sealant or PTFE tape rated for the service fluid before assembly. Do not over-tighten; follow standard wrench-engagement practices for malleable iron threaded fittings to avoid cracking the fitting body.