Copper end cap Conex 15 mm – plumbing fitting for pipe termination

Conex copper end cap for 15 mm copper pipe provides a durable, corrosion-resistant termination for domestic and light commercial plumbing systems. Designed to fit standard 15 mm copper tubing, this end cap creates a sealed closure for pipe ends during installation, repair, or temporary shutdowns. The fitting is manufactured from copper to match the material properties of copper pipework, ensuring reliable mechanical and thermal compatibility.

Advantages

The copper construction offers good corrosion resistance and solderability, enabling strong, leak-tight joints when brazed or soldered to the pipe. Its compact form factor and precise internal diameter ensure a snug fit with 15 mm copper tube, reducing the risk of leaks at the termination point. Because it matches copper pipe physically and thermally, it minimises stress and electrochemical issues in mixed-metal installations.

Suitable for

• Sealing open ends of 15 mm copper supply and branch pipes
• Temporary or permanent termination during plumbing repairs and maintenance
• Closing off unused stub-outs in residential heating and water systems
• Applications requiring soldered or brazed copper joints

Key specifications

• Material: copper
• Nominal pipe size compatibility: 15 mm
• Connection method: soldering/brazing (suitable for cap installation by heat-joined methods)
• Function: pipe end closure / cap
• Typical use environment: potable water, heating and general plumbing systems

How to use

Prepare the 15 mm copper tube end by cutting square and cleaning the external surface and bore to remove burrs, oxides and contaminants. Position the copper end cap over the tube and apply appropriate flux if soldering; for brazing use suitable filler and heating methods. Heat the joint evenly until the solder or filler flows and forms a continuous seal around the contact area. Allow the joint to cool naturally and inspect for a continuous bead and leak-tightness before restoring system pressure.

Usage recommendations

Use compatible fluxes and filler materials rated for potable water systems where applicable. Avoid mixing dissimilar metals directly; if transition to other metals is required, use appropriate dielectric fittings or approved isolation methods. Ensure installation is performed by a qualified person following local plumbing codes and safety practices.