5/8 inch x 3/8 inch Brass Reducing Compression Union Compression x Compression

5/8” x 3/8” Lead-Free Brass Reducing Compression Union – Designed for Secure Line Transitions

The 5/8” x 3/8” Lead-Free Brass Reducing Compression Union provides a dependable solution for joining dissimilar pipe sizes without soldering or special tools. Constructed from durable, corrosion-resistant brass, this fitting is engineered for use in potable water systems, ensuring a tight, long-lasting seal between lines of different diameters.

Performance Features

• ✔️ Lead-Free Brass Body – Complies with Safe Drinking Water Act (SDWA) requirements for use in potable water systems.
• ✔️ Compression Connection – Allows secure assembly using standard wrenches, eliminating the need for heat or solder.
• ✔️ Reduced Sizing Transition – Facilitates the connection of a 5/8” O.D. tube to a 3/8” O.D. tube for flexible adaptation in system design.
• ✔️ Vibration-Resistant Seal – Designed to hold pressure under fluctuating conditions, reducing the risk of leakage.

Technical Specifications

• Material: Lead-free forged brass (per ANSI/NSF 61 and 372)
• Connection Type: Compression x Compression
• Tube Size: 5/8 inch O.D. x 3/8 inch O.D.
• Maximum Pressure: Up to 200 PSI (varies based on tube type and temperature)
• Temperature Rating: 40°F to 180°F
• Standards: ASME B16.51, NSF/ANSI 61, NSF/ANSI 372

Installation Considerations

This reducing compression union is designed for easy field installation. The joint is formed by compressing a brass ferrule around the tubing as the nut is tightened, eliminating the need for solder, flux, or flame. Ensure that tubing is cut square and deburred prior to insertion. Tightening beyond manufacturer recommendations may distort the ferrule and impair sealing performance.

Application Uses

This fitting is commonly used in residential water supply systems, appliance hookups, and light commercial installations. It provides a clean solution for retrofitting or transitioning between tube sizes in confined spaces or service areas where flame-based joining methods are not practical.

Did You Know?

Compression unions are frequently chosen for installations where disassembly may be required in the future—such as maintenance lines for dishwashers, water filtration units, or shut-off valve transitions—due to their reusability and serviceability.

The 5/8” x 3/8” Lead-Free Brass Reducing Compression Union offers a professional-grade solution for achieving tight, leak-free transitions in your plumbing layout. Its durable construction and compliance with current code standards make it a reliable choice for safe water system installations.