Reduction nipple SANHA SANHA-Therm ZWxZZ 18×15 mm, copper fitting

SANHA-Therm reduction nipple ZWxZZ 18×15 mm is a copper fitting designed to connect pipes of different outside diameters in heating, potable water and general plumbing systems. The component reduces a line from 18 mm to 15 mm, providing a compact metallic transition suitable for long-term installation where a soldered or otherwise compatible copper joint is required. The fitting is made of copper to ensure thermal conductivity, corrosion resistance in typical water and heating environments, and mechanical stability under normal operating conditions.

Advantages

The reduction nipple offers a reliable, corrosion-resistant transition between two pipe sizes and supports common copper joining methods such as soldering or brazing. Its compact geometry minimizes pressure drop at the connection point while maintaining mechanical strength. Manufactured to standard copper plumbing dimensions, the fitting integrates with matching 18 mm and 15 mm copper piping and fittings for straightforward installation and serviceability.

Suitable for

• Domestic and commercial heating systems
• Potable water supply and distribution
• Plumbing repairs and retrofits where pipe size change is required
• Applications requiring soldered or brazed copper connections

Key specifications

• Material: Copper
• Connection type: Cylindrical reduction for soldering or comparable copper joining methods
• Inlet outer diameter: 18 mm
• Outlet outer diameter: 15 mm
• Application range: Heating, potable water, general plumbing
• Shape: Straight reduction nipple

How to use

Prepare pipe ends by cutting squarely and removing burrs and oxidation. Clean mating surfaces and apply appropriate flux for copper joints. Insert the pipe ends fully into the matching 18 mm and 15 mm ends of the reduction nipple, then perform soldering or brazing in accordance with local codes and the chosen joining method's instructions. Allow the joint to cool naturally and inspect for a continuous fillet and leak-free connection before returning the system to service.

Usage recommendations

Use appropriate safety equipment and follow local plumbing and heating regulations when performing soldering or brazing. Verify compatibility with system media and operating temperatures; ensure water systems are flushed and pressure-tested after installation to confirm leak-tight performance.