Value Collection 168-003NL Dielectric Union 1/2 Inch

Product Description

The VALUE COLLECTION 168-003NL is a dielectric union designed to connect dissimilar metals in plumbing systems while preventing galvanic corrosion. It accepts 1/2 inch female NPT, 1/2 inch male NPT, and 1/2 inch sweat connections, giving installers flexibility across copper and threaded pipe configurations. The dielectric sleeve and seat electrically isolate the two sides of the joint, stopping the electrochemical reaction that degrades fittings over time. At 0.6 pounds, it is a compact, single-piece fitting suited for residential and light commercial plumbing installations. Licensed plumbers and pipefitters are the typical installers for this type of union.

This dielectric union is used wherever a transition between copper tubing and threaded iron or steel pipe is required. Common applications include connections at water heaters, boilers, and other plumbing equipment where copper supply lines meet steel or galvanized threaded ports. The sweat end accommodates direct solder connection to copper pipe, while the NPT ends thread directly onto iron fittings or equipment nipples. It is appropriate for residential potable water systems and light commercial plumbing where local codes require dielectric isolation at dissimilar-metal joints.

Key Features

• Three-way connection compatibility: 1/2 inch FNPT, 1/2 inch MNPT, and 1/2 inch sweat
• Dielectric isolation prevents galvanic corrosion at dissimilar-metal transitions
• Compact form factor: 2.75 inches tall, 1.75 inches wide
• Single-unit package suitable for individual repair or replacement jobs
• Lightweight at 0.6 pounds for easy single-hand installation

Compatibility

Designed as an OEM-style replacement dielectric union for residential and light commercial plumbing systems requiring 1/2 inch threaded or sweat connections at dissimilar-metal transitions.

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 completely before removing the existing fitting or making new connections. Use thread sealant or PTFE tape on all NPT threads and follow standard soldering practice for the sweat end. Do not over-tighten the union nut, as excessive force can damage the dielectric seat and compromise electrical isolation.