Legend Valve 301-105nl 1 Inch Dielectric Union

Product Description

The LEGEND VALVE 301-105nl is a 1-inch female-by-sweat (FxS) dielectric union designed to isolate dissimilar metals in potable water and hydronic piping systems. The no-lead construction meets safe drinking water requirements, making it suitable for installations where lead-free compliance is mandatory. Dielectric unions prevent galvanic corrosion at the joint between copper tubing and threaded iron or steel pipe, a critical function in both residential and light commercial plumbing systems. Licensed plumbers install this fitting where code requires the separation of dissimilar metals in a pressurized water line.

This dielectric union is used in residential and light commercial plumbing applications where copper tubing transitions to steel or iron pipe. Typical installation points include water heater connections, boiler supply and return lines, and other locations where copper meets ferrous pipe. The sweat end connects directly to copper tube, and the threaded end mates with standard iron pipe. The no-lead dielectric insert and gasket provide the electrical isolation required to stop galvanic action at the joint.

Key Features

• 1-inch FxS (female-by-sweat) connection configuration for copper-to-iron transitions
• No-lead construction compliant with safe drinking water standards
• Dielectric insulation prevents galvanic corrosion between dissimilar metals
• Union design allows future disassembly without cutting pipe
• Suitable for potable water and hydronic heating applications

Compatibility

Designed as an OEM-style replacement or new-installation dielectric union for 1-inch copper sweat and female iron pipe connections in residential and light commercial plumbing systems.

Installation Notes

Installation is performed by a licensed plumber in accordance with applicable local plumbing codes and the International Plumbing Code (IPC). Shut off the water supply and relieve system pressure before soldering or disassembling the union. Use appropriate flux and solder rated for potable water on the sweat end, and apply thread sealant compatible with drinking water systems on the threaded end. Do not over-tighten the union nut, as this can damage the dielectric gasket and compromise electrical isolation.

Technical Specifications

• Connection Size: 1 inch
• Connection Type: Female x Sweat (FxS)
• Lead Content: No Lead
• Product Type: Dielectric Union

Standard Information

• Brand: LEGEND VALVE
• Manufacturer Part Number: 301-105nl