Lincoln Electric 331756 Lead Free Silver Solder

Product Description

The LINCOLN ELECTRIC 331756 is a lead free premium silver solder designed for professional plumbing and HVAC brazing applications. Formulated without lead, this solder meets modern potable water safety requirements while delivering strong, reliable joints on copper and copper alloy fittings. It is positioned as a functional equivalent to WS15318 SilvaBrite-style formulations, making it a practical choice for techs sourcing a replacement with comparable performance characteristics. Licensed plumbers and HVAC service professionals are the primary installers of this product in both new construction and repair work.

This silver solder is suited for sweat-soldering copper pipe and fittings in residential and light commercial plumbing systems, including domestic hot and cold water lines, hydronic heating loops, and refrigerant-side copper work where local codes permit soft soldering. Its lead free composition makes it appropriate for use on systems that carry potable water, aligning with NSF and lead free plumbing code requirements in most jurisdictions.

Key Features

• Lead free formulation meets potable water safety standards
• Premium silver-bearing alloy for strong, clean joints on copper and copper alloys
• Equivalent performance to WS15318 SilvaBrite-style solder products
• Suitable for plumbing, HVAC, and light refrigeration copper work

Compatibility

Designed as an OEM-style replacement and functional equivalent to WS15318 SilvaBrite formulations for use in copper and copper alloy soldering applications in plumbing and HVAC systems.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC technician in accordance with applicable local plumbing codes, including IPC and IFGC requirements. Shut off and drain the affected water or fluid system before applying heat to any joint. Use an appropriate flux rated for lead free solder and ensure proper surface preparation by cleaning and deburring pipe ends before soldering. Avoid overheating joints, as excessive temperature can burn off flux and compromise joint integrity.

Technical Specifications

• Lead Content: Lead free
• Alloy Type: Premium silver-bearing solder
• Equivalent To: WS15318 SilvaBrite

Standard Information

• Brand: LINCOLN ELECTRIC
• Manufacturer Part Number: 331756