SANHA fitting SANHA-Therm Mufa ZWxZW 42 – threaded copper/solder sleeve coupling, 42 mm

SANHA-Therm Mufa ZWxZW 42 is a 42 mm coupling designed to join copper or compatible plumbing pipes with a combination of a solderable sleeve and a threaded connection. The fitting provides a transition between a soldered joint and a male-threaded pipe or component, enabling secure connections in heating, potable water and HVAC installations where both leak-tight solder joints and mechanical screw fittings are required.

Advantages

The coupling combines a solderable copper sleeve with a precision-machined threaded end to allow a reliable hybrid connection without the need for separate adapters. Its construction ensures durable mechanical strength at the threaded interface while retaining the corrosion-resistant and leak-tight properties of soldered copper joints. The design supports straightforward on-site assembly with standard plumbing soldering and threading practices and is compatible with common copper pipe sizes and fittings used in residential and commercial systems.

Suitable for

• Domestic and commercial heating systems
• Potable water supply lines
• HVAC installations requiring transitions between soldered and threaded connections
• Repairs and retrofits where a threaded connection must be added to existing soldered copper pipework

Key specifications

• Nominal pipe size: 42 mm
• Material: copper fitting with threaded end
• Connection types: solderable sleeve (ZW) and male-threaded end (Z or similar)
• Designed for use with copper and compatible plumbing pipes
• Intended application areas: heating, potable water and HVAC systems

How to use

Prepare the copper tube by cutting square and cleaning the insertion area to bright metal. Slide flux as required and solder the pipe into the solderable sleeve using an appropriate heat source and solder alloy according to local regulations. Allow the soldered joint to cool and inspect for a complete fillet. Thread the coupling onto the mating male thread or apply suitable sealing material such as approved PTFE tape or pipe thread sealant where required, and tighten to the torque recommended for the system components. Follow standard installation practices and local codes for pressure testing after assembly.

Usage recommendations

Use approved plumbing solder and flux suitable for potable water if the coupling is used on drinking water lines. Ensure threads and solder joints are compatible with the system pressure and temperature ratings. When combining soldered and threaded connections, allow proper cooling and inspect both joint types for leaks during pressure testing.