5/8 inch x 1/2 inch Brass Reducing Compression Union Compression x Compression

5/8 inch OD x 1/2 inch OD Lead-Free Brass Compression Union – Built for Durable, Flame-Free Connections

The 5/8 inch OD x 1/2 inch OD Lead-Free Brass Compression Union is engineered for use in plumbing systems requiring a mechanical, solder-free connection. This union is ideal for joining dissimilar tubing sizes in potable water lines, HVAC systems, and select low-pressure gas applications where code permits.

Manufactured from lead-free brass in accordance with ANSI and NSF/ANSI standards, this fitting provides corrosion resistance, strength, and a dependable seal under moderate pressure. It is compatible with copper, aluminum, and select thermoplastic tubing types, making it a versatile solution for professional-grade installations.

Performance Benefits

• Lead-Free Certification: Complies with Safe Drinking Water Act (SDWA) guidelines, ensuring suitability for potable water systems.
• Mechanical Grip: Compression design secures tubing without heat, ideal for applications where open flame is restricted.
• Disassembly Capability: Easily removed and reused for maintenance, system modifications, or component replacement.
• Reduced Leak Risk: Tapered compression seats and precision-machined nuts provide tight sealing without thread sealant.
• Dimensional Compatibility: Joins 5/8 inch OD tubing to 1/2 inch OD tubing in mixed-size systems or repair conditions.

Specifications

• Material: Lead-Free Brass (Certified to NSF/ANSI 61 and 372)
• Connection Type: Compression x Compression
• Tubing Compatibility: Soft Copper, Aluminum, and CPVC (with insert)
• Operating Pressure: Up to 200 PSI (dependent on tubing and installation method)
• Temperature Range: 40°F to 180°F typical service range

Installation Notes

Compression unions should be installed using proper tube preparation: ensure square cuts, remove burrs, and insert tubing fully into the body. Avoid over-tightening to prevent ferrule distortion. These fittings do not require thread sealant when installed correctly. While suitable for quick field repairs, they are also dependable in permanent system layouts when installed to specification.

Applications

Ideal for residential and commercial systems, including potable water lines, humidification systems, and general plumbing retrofits where mixed tube sizes are joined. Their flame-free connection method is particularly valuable in confined or occupied spaces.

Code Compliance

This union meets federal and state requirements for lead-free plumbing components and is manufactured under ISO-certified processes for consistent quality and performance.

The 5/8 inch OD x 1/2 inch OD Brass Compression Union delivers a reliable, reworkable connection that meets professional expectations for both safety and service life. Choose this union when your application requires code compliance, mechanical integrity, and ease of installation—without compromising on durability.