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1" Bronze Pack Joint Union – Compression x Female Pipe Thread

The 1 inch Bronze Pack Joint Union is a mechanical fitting designed to connect copper or CTS (Copper Tube Size) tubing to a threaded pipe or fitting, using a pack joint compression mechanism. Manufactured from corrosion-resistant bronze, this union is suitable for use in underground water service lines and distribution systems where disassembly or service access is required.

Performance Characteristics

This union features a precision-machined compression body and nut that, when tightened, compress a gasket or packing sleeve around the tubing. It allows for quick connection without soldering or heat application and maintains system integrity under pressure and thermal fluctuation. Key features include:

• ✅ Bronze Construction: Offers excellent corrosion resistance and dimensional stability in water and soil environments.
• ✅ Pack Joint Design: Provides a reliable, re-accessible joint between copper tubing and threaded pipe systems.
• ✅ Leak-Resistant Threads: NPT (National Pipe Taper) threads ensure secure sealing when used with approved thread sealant.
• ✅ Serviceable Union: Allows for future disconnection or replacement without cutting pipe.

Technical Specifications

• Material: Bronze (lead-free, compliant with potable water standards)
• Nominal Size: 1 inch
• End Connections: Compression (pack joint) x Female NPT
• Application: Potable water service, underground piping, and retrofit installations

Installation Guidelines

The pack joint end must be properly aligned with clean, round copper tubing before tightening. Compression nuts should be torqued evenly to compress the gasket or sleeve around the pipe. For the threaded end, use PTFE tape or a compatible pipe joint compound. This union is intended for systems operating under typical service pressures; always follow manufacturer torque recommendations and local code requirements.

Common Applications

Typically used in underground water service lines, distribution branches, and areas where future disassembly may be necessary. Also applicable in meter settings and retrofit configurations involving transitions from municipal supply lines to building plumbing systems.

Material Insight

Bronze fittings offer high strength, corrosion resistance, and compatibility with a range of pipe materials. Their resistance to dezincification and wear makes them ideal for service lines and distribution systems requiring long-term durability under varying environmental conditions.

The 1" Bronze Pack Joint Union provides contractors with a versatile, mechanically sound connection method that balances durability and serviceability in pressurized water systems. Suitable for new installations or system upgrades where reliability and code compliance are critical.