3/4 inch PEX Brass Insert Adapter PEX x Copper

3/4" PEX x 3/4" Copper Sweat Adapter – Lead-Free Brass Transition Fitting

The 3/4" PEX x 3/4" Copper Adapter is a transition fitting designed for connecting cross-linked polyethylene (PEX) tubing to Type L or M copper tubing in potable water systems. This fitting features a PEX barb insert on one end and a copper sweat connection on the other, facilitating secure joints between dissimilar piping materials while maintaining full system performance and compliance with low-lead requirements.

Manufactured from lead-free brass in accordance with ASTM F1807 and NSF/ANSI 61 and 372 standards, this fitting supports crimp or clamp installation methods on the PEX side and requires soldering on the copper side. The adapter is compatible with PEX systems using ASTM F1807 crimp rings or ASTM F2098 stainless steel cinch rings.

Technical Specifications

• Material: Lead-free brass (complies with NSF/ANSI 372)
• PEX Side: 3/4" insert (ASTM F1807)
• Copper Side: 3/4" nominal copper sweat (ASTM B88)
• Operating Pressure: Up to 160 PSI @ 73°F
• Temperature Range: 33°F to 200°F
• Certifications: NSF/ANSI 61 & 372, ASTM F1807

Applications

This adapter is used in potable water distribution systems where a transition between PEX tubing and copper pipe is required. Common applications include:

• ✅ Domestic hot and cold water lines
• ✅ Residential repipe and remodel projects
• ✅ Manifold distribution systems
• ✅ Transition from legacy copper lines to new PEX systems

Installation Guidelines

Use standard PEX crimp or clamp tools for the PEX side and lead-free solder and flux on the copper side. Ensure proper pipe preparation including reaming, cleaning, and dry-fit prior to applying heat. Avoid excessive torch heat that may degrade the fitting or surrounding components. Pressure test system per code prior to service.

Key Performance Features

• ✅ Corrosion-Resistant Brass: Lead-free alloy provides long-term durability in potable systems
• ✅ Mechanical Strength: Supports thermal expansion and vibration typical in mixed-material systems
• ✅ Leak-Resistant: Precision-machined insert and sweat end ensure reliable sealing when installed per specification
• ✅ Code Compliant: Certified for use in jurisdictions mandating lead-free materials in drinking water systems

Regulatory Note

This product complies with the U.S. Safe Drinking Water Act and is suitable for use in all 50 states where lead-free fittings are required. Always verify compatibility with local plumbing code and system design criteria.

The 3/4" PEX x 3/4" Copper Lead-Free Adapter is a precision component for PEX-to-copper transitions, offering code-compliant performance and long-term reliability in residential and light commercial plumbing systems.