Conex fitting nipple 15x3/8" for soldered and threaded connections, bronze, model 4243G015003000

Conex fitting nipple 15x3/8" in bronze (model 4243G015003000) is designed to join 15 mm copper or copper-alloy tubing to 3/8" threaded fittings. The component is suitable for soldered (capillary) and threaded connections, combining a smooth tube end for reliable solder joints with a machined threaded male end for standard fittings. Bronze construction offers corrosion resistance and durable mechanical strength for potable water and heating system applications.

Advantages

The bronze material resists dezincification and provides long-term stability in contact with potable water and heating media. Dual-connection design supports both soldered joints on the 15 mm side and threaded connections on the 3/8" side, reducing the need for additional adapters. Precision machining ensures a tight fit to minimize leaks when installed correctly, and the compact nipple format simplifies transitions in confined spaces.

Suitable for

• Connecting 15 mm copper or copper-alloy tubing to 3/8" threaded valves and fittings
• Domestic potable water supply lines
• Heating system branch connections and radiators
• Plumbing repairs and retrofitting where a mixed joint is required

Key specifications

• Material: bronze, suitable for water and heating media
• Connection A: 15 mm tube end for capillary (solder) joint
• Connection B: 3/8" male threaded end for standard fittings
• Application: soldered and threaded connections
• Typical use environment: potable water and heating installations

How to use

Prepare the 15 mm copper tubing by cutting squarely, deburring and cleaning the tube and fitting surfaces. Apply appropriate flux for capillary soldering, insert the bronze nipple into the tube end, and heat the joint evenly until solder flows to form a complete fillet. For the 3/8" threaded end, apply suitable thread sealant or tape to the male threads and tighten to the required torque using appropriate tools. Ensure the system is pressure-tested after installation and check for leaks at both the soldered and threaded connections.

Usage recommendations

Use approved solder and flux materials compatible with potable water systems. When working on heating systems, isolate and depressurize the circuit before installation. Avoid excessive torque on the threaded connection to prevent thread damage; follow manufacturer torque guidelines where available. Regularly inspect joints during commissioning and periodic maintenance.