Legend Valve 301-123nl Dielectric Union 3/4 Fnpt X 1/2 Sweat

Product Description

The LEGEND VALVE 301-123nl is a no-lead dielectric union designed to connect dissimilar metals in potable water piping systems while preventing galvanic corrosion. The fitting transitions between a 3/4 inch female NPT threaded connection and a 1/2 inch sweat (solder) end, making it a practical solution where copper and ferrous pipe meet. Rated to 180 degrees F maximum temperature and 200 psi cold working pressure, this union meets performance demands in residential and light commercial plumbing applications. The no-lead construction satisfies federal and state safe drinking water regulations for use in potable water systems. Plumbers and pipefitters install this fitting as part of water heater connections, boiler supply and return lines, and other points where copper tubing meets iron or steel pipe.

This dielectric union is suited for residential and light commercial plumbing installations where copper tubing must connect to galvanized or black iron pipe. Typical applications include water heater inlet and outlet connections, boiler piping, and any service point where mixed-metal piping creates a galvanic corrosion risk. The 3/4 inch FNPT x 1/2 inch sweat configuration is a common size pairing in these scenarios. No specific model compatibility data was provided by the manufacturer for this SKU.

Key Features

• No-lead construction compliant with safe drinking water requirements for potable water use
• Dielectric insulation prevents galvanic corrosion at dissimilar metal joints
• 3/4 inch FNPT x 1/2 inch sweat end connections for copper-to-threaded transitions
• Rated to 180 degrees F maximum temperature
• 200 psi cold working pressure rating

Compatibility

Designed as an OEM-style replacement or new-installation dielectric union for residential and light commercial potable water piping systems where copper tubing connects to threaded iron or steel pipe.

Installation Notes

Installation is performed by a licensed plumber. Shut off the water supply and depressurize the line before beginning work. The sweat end requires standard soldering technique with lead-free solder in potable water applications; do not apply heat directly to the plastic dielectric sleeve. Work must comply with applicable local plumbing codes and IPC guidelines for dielectric fittings on dissimilar metal connections.

Technical Specifications

• Connection Type: 3/4 inch FNPT x 1/2 inch Sweat
• Maximum Temperature: 180 degrees F
• Cold Working Pressure: 200 psi
• Lead-Free: Yes
• Weight: 0.43 pounds
• Dimensions: 1.8 x 1.9 x 1.6 inches
• UPC: 662545087689

Standard Information

• Brand: LEGEND VALVE
• Manufacturer Part Number: 301-123nl