3/4 inch Brass Press Union Press x Press

3/4 Inch Brass Press Union – Press x Press Connection for Potable Water and Hydronic Systems

The 3/4 inch brass press union provides a mechanical, flame-free solution for connecting copper tube in potable water and closed-loop hydronic systems. Featuring press connections on both ends and a central union nut, this fitting allows disassembly at the union joint for future service or component replacement without disturbing adjacent pipe sections.

Material and Design Attributes

Manufactured from lead-free brass, this union is compliant with NSF/ANSI 61 and 372 for potable water use. The press connections incorporate factory-installed EPDM sealing elements and are compatible with standard press jaw profiles (e.g., TH or V-type). The union nut allows for alignment adjustment and makes this fitting suitable for systems requiring component isolation or future maintenance access.

• ✅ Material: Lead-free brass (compliant with ASTM B584 and federal SDWA requirements)
• ✅ Connection Type: Press x Press with integrated EPDM O-rings
• ✅ Union Assembly: Mechanical threaded collar for sectional disassembly
• ✅ Seal Type: Dual O-ring, approved for water applications (EPDM only)

Technical Specifications

• Nominal Size: 3/4 inch
• Working Pressure: Up to 200 psi
• Temperature Range: 0°F to 250°F (depending on seal material)
• Compliance: NSF/ANSI 61, NSF/ANSI 372, ASME B16.18, IAPMO/UPC listed

Applications

This press union is used in potable water, hot water recirculation loops, radiant heating systems, and other installations requiring a serviceable connection between two copper tube segments. It is especially effective in retrofit or confined-space installations where flame-free joining is preferred. Designed for use with Type K, L, or M copper tubing.

Installation Requirements

Pipe ends must be properly reamed, deburred, and marked for insertion depth. Use only manufacturer-approved press tools and jaws. Ensure the union nut is torqued according to specifications to achieve full mechanical engagement. Pressure testing with water or air must be performed per local code and manufacturer guidelines prior to commissioning.

Code Consideration

Lead-free brass press fittings are required for all potable water applications per federal regulations and adopted plumbing codes in all 50 states. This union meets those criteria and supports code-compliant system design.

The 3/4 Inch Brass Press Union (Press x Press) is a durable, serviceable, and code-approved fitting for connecting copper tube in water and hydronic piping systems. Its union design enables future disassembly without compromising surrounding connections, making it ideal for both initial installation and long-term maintenance planning.