1/2 inch Brass Union Press x Press

1/2 Inch Brass Press Union – Press x Press Connection for Copper Tube Systems

The 1/2 inch brass press union is a mechanical fitting designed to connect two sections of copper tubing with the ability to later disassemble without cutting pipe. Featuring press-fit ends on both sides, this union provides a flame-free installation option that supports rapid assembly and long-term serviceability in potable water, hydronic heating, and low-pressure system applications.

Material and Functional Specifications

Manufactured from lead-free brass, this press union includes EPDM sealing elements and stainless steel grip rings. It meets requirements for mechanical strength, corrosion resistance, and dimensional precision for use in press-connect piping systems:

• ✅ Press Connection Ends Compatible with ASTM B88 copper tubing (Types L and M) using standard press tools with approved jaws.
• ✅ Lead-Free Brass Body Compliant with NSF/ANSI 61 and 372 for potable water contact.
• ✅ Sealing Elements Factory-installed EPDM O-rings designed for water distribution and hydronic systems.
• ✅ Union Nut Design Allows separation of pipe sections for maintenance or system modifications without cutting pipe.

Installation Guidelines

Ensure tubing is properly cleaned, deburred, and marked to insertion depth. Use manufacturer-approved press tools and jaw sets to achieve a full 360° crimp. Do not attempt to rotate the union nut during pressing. After installation, pressure test according to system specifications to verify seal integrity.

Common Use Cases

This union is typically installed in copper water supply lines, branch takeoffs, and locations where future disassembly is required, such as near water heaters, mixing valves, manifolds, or isolation valves. It is suitable for use in both residential and light commercial installations where soldering is not feasible or permitted.

Regulatory Compliance

Certified for use in potable water systems and compliant with Uniform Plumbing Code (UPC), International Plumbing Code (IPC), and IAPMO-listed press systems. Always confirm local approval requirements for press fitting use in concealed locations.

Technical Specifications

• Material: Lead-Free Brass (Body), EPDM (Sealing Elements), Stainless Steel (Grip Rings)
• Nominal Size: 1/2 inch
• Connection Type: Press x Press
• Working Pressure: Up to 200 PSI (per system rating)
• Temperature Rating: 32°F to 250°F (varies by application and sealing element type)
• Certifications: NSF/ANSI 61, 372; ASME B16.51; IAPMO listed

The 1/2 inch Press x Press Brass Union provides a removable, press-to-connect solution for copper piping systems. Specify this fitting when system accessibility, leak-free sealing, and code-compliant performance are required in new construction or retrofit applications.