Compression reducing coupling VIEGA 42 x 35 mm soldered 106935

VIEGA compression reducing coupling 42 x 35 mm soldered is a metal pipe fitting engineered to join a 42 mm copper (or compatible metal) pipe to a 35 mm pipe with a permanent soldered joint. Designed for plumbing and heating systems, this reducing coupling provides a sealed transition between different pipe diameters, ensuring stable flow and mechanical integrity in potable water, central heating and general pipework installations where a soldered connection is preferred.

Advantages

The coupling offers a reliable, leak-resistant joint after proper soldering and is manufactured to consistent dimensional tolerances for straightforward installation. Its reducing form factor allows integration of different pipe sizes without additional adapters, reducing the number of joints and potential leak points. Made from materials compatible with standard copper piping and heating circuits, the fitting supports long-term service in potable water and heating applications when installed according to applicable regulations.

Suitable for

• Connecting 42 mm to 35 mm copper or compatible metal pipes
• Potable water distribution systems
• Central heating and radiator connections
• Permanent soldered pipework in domestic and commercial buildings

Key specifications

• Type: Reducing soldered coupling for compression-style installation
• Connection method: Soldered joint
• Materials: Metal compatible with copper piping (suitable for soldering)
• Pipe diameters: 42 mm to 35 mm
• Application environment: Potable water, heating systems, general pipework

How to use

Prepare pipe ends by cutting squarely, deburring and cleaning the mating surfaces to remove oxidation and contaminants. Apply appropriate flux to both the pipe ends and the inside of the fitting, insert the pipes fully into the coupling, and heat the joint evenly with a suitable torch until solder flows and forms a continuous fillet around the joint. Allow the assembly to cool naturally and then clean residual flux. Follow local codes and manufacturer recommendations for solder type, heating method and safety precautions.

Usage recommendations

Use lead-free solder and flux suitable for potable water systems. Verify compatibility of materials and ensure the work area is well-ventilated. Pressure-test the system after cooling and cleaning to confirm a leak-free installation. For installations in central heating systems, follow system-specific requirements such as corrosion inhibitors and appropriate expansion considerations.