Compression reducing coupling VIEGA 20 x 16 mm, brass, polished

Compression reducing coupling VIEGA 20 x 16 mm, brass, polished is a compact mechanical connector designed to join 20 mm and 16 mm pipes in potable water and heating systems. Made of brass with a polished surface, the fitting creates a reliable transition between two pipe diameters without soldering or welding, suitable for repair, renovation and new-build installations where space efficiency and durability are required.

Advantages

The brass construction offers good corrosion resistance and mechanical strength while the polished finish provides a smooth surface that is easy to clean. The compression design allows for a secure, leak-resistant connection without the need for heat or complex tools, reducing installation time. Its compact form factor simplifies use in tight spaces and enables a straightforward transition between 20 mm and 16 mm pipelines.

Suitable for

• Connecting 20 mm to 16 mm copper, brass or compatible plastic pipes in potable water systems
• Reducing pipe diameter in residential heating circuits
• Repairing or upgrading existing pipework during renovation
• Compact installations where a space-saving reducer is required

Key specifications

• Material: brass
• Connection type: compression reducing coupling
• Pipe diameters: 20 mm to 16 mm
• Surface finish: polished
• Application: potable water and heating systems
• Installation: push-on with compression ferrule and nut (mechanical joint, no soldering)

How to use

Ensure both pipes are cut square and free of burrs, dirt and oil. Slide the compression nut and ferrule onto each pipe end, insert the smaller-diameter pipe into the reducer until it seats, then tighten the compression nuts evenly to form a seal. Follow standard plumbing practice by hand-tightening and then applying the recommended additional turns with an appropriate wrench to achieve the required compression without over-tightening. Pressure-test the connection after installation according to local regulations.

Usage recommendations

Use compatible pipe materials and sizes, verify that the fitting is suitable for potable water if required, and follow applicable local codes. Do not force mismatched pipe types together; where necessary, use approved adaptors or consult technical documentation for material compatibility. Regular inspection after installation is advised to confirm the joint remains leak-free.