Value Collection 167-004NL Dielectric Union 3/4 in

Product Description

The VALUE COLLECTION 167-004NL is a dielectric union designed to connect dissimilar metals in water supply piping systems, preventing galvanic corrosion at the joint. It accepts 3/4-inch female NPT, 3/4-inch male NPT, and 3/4-inch sweat connections, making it adaptable to copper and threaded iron or steel piping in a single fitting. Weighing 1.18 pounds, this union is sized for residential and light commercial plumbing applications. Licensed plumbers and pipefitters install dielectric unions wherever copper tubing meets ferrous pipe, such as at water heater connections, boiler supply and return lines, and other mixed-metal piping transitions.

This dielectric union is suited for residential and commercial plumbing installations where copper pipe meets galvanized steel or black iron pipe. Typical applications include water heater inlet and outlet connections, hydronic heating system piping, and general domestic water supply lines. The sweat end accommodates standard 3/4-inch copper tubing, while the NPT ends accept threaded steel or brass fittings. This fitting is sold as a single unit per package.

Key Features

• Dielectric union design isolates dissimilar metals to prevent galvanic corrosion
• 3/4-inch FNPT, 3/4-inch MNPT, and 3/4-inch sweat connection options in one fitting
• Compact dimensions: 1.31 inches length, 1.22 inches width, 1.85 inches height
• Single-unit packaging suitable for individual repair or replacement jobs
• Compatible with standard 3/4-inch copper tubing and 3/4-inch NPT threaded pipe

Compatibility

Designed as an OEM-style replacement dielectric union for 3/4-inch residential and light commercial plumbing systems using mixed copper and threaded ferrous pipe.

Installation Notes

Installation should be performed by a licensed plumber in accordance with local plumbing codes and the International Plumbing Code (IPC). Shut off the water supply and relieve system pressure before removing any existing fitting. Sweat connections require proper flux application and soldering technique; threaded connections should be sealed with thread sealant or PTFE tape rated for water service. Do not overtighten threaded ends, as the internal dielectric sleeve can be damaged by excessive force.