Conex coupling for soldered and threaded connections 35×5/4" bronze - model 4270G035010000

The Conex coupling for soldered and threaded connections 35×5/4" bronze (model 4270G035010000) is a dual-purpose pipe fitting designed to join copper or compatible metal pipes where one end requires a soldered joint and the other a threaded connection. Manufactured in bronze, the coupling delivers corrosion-resistant mechanical strength suitable for plumbing and heating installations. Its dimensions—35 mm outer diameter with a 5/4" threaded end—allow transition between soldered piping runs and threaded components such as valves, meters or fittings.

Advantages

This Conex coupling offers a reliable metal-to-metal transition between soldered and threaded pipework, reducing the number of separate adapters required on site. The bronze construction provides improved resistance to dezincification and corrosion compared with standard brass in many environments. The component is compact and designed for straightforward installation in tight spaces, supporting both permanent soldered joints and mechanically sealed threaded connections for maintenance access or future disassembly.

Suitable for

• Joining copper or compatible metal pipes where one end is soldered and the other is threaded
• Repairing damaged sections of plumbing and heating systems
• Connecting pipes to threaded valves, meters or fittings
• Transitioning between capillary soldered runs and screw-in components

Key specifications

• Material: bronze
• Pipe connection type (one end): designed for soldered (capillary) joint to 35 mm pipe
• Pipe connection type (other end): 5/4" threaded female/male interface as specified
• Intended applications: potable water, heating and general plumbing systems where bronze fittings are acceptable
• Construction: solid machined/cast bronze body suitable for standard soldering techniques and threaded assembly

How to use

Prepare the pipe ends by cleaning and de-greasing the soldering end and applying appropriate flux for capillary soldering. Slide the coupling onto the prepared pipe and perform the soldering operation following standard safety and plumbing practices until a secure joint is formed. On the threaded side, apply an appropriate thread sealant or tape to the thread to ensure a leak-tight connection, then engage the threaded component and tighten to the recommended torque for the system. Allow the soldered joint to cool and test the assembly under pressure according to local codes and regulations.

Usage recommendations

Use suitable solder and flux compatible with bronze and the pipe material; avoid overheating the bronze excessively during soldering to preserve mechanical properties. Verify compatibility of the fitting with the system media and local plumbing regulations. For pressurized systems, perform a pressure test after installation and inspect threaded connections periodically for tightness and leaks.