Compression coupling Comap MultiSkin brass/tinned 20x3/4 for plumbing connections

Compression coupling Comap MultiSkin brass/tinned 20x3/4 is a compression fitting designed to create a sealed threaded connection between pipes and 3/4" fittings. Constructed from brass with a tinned finish, the coupling is intended for use in potable water supply and heating systems where a reliable, corrosion-resistant joint is required. The design accommodates copper, multilayer and compatible plastic piping and performs as a transition between pipe materials and threaded fixtures.

Advantages

The tinned brass construction provides enhanced corrosion resistance compared with untreated brass and maintains conductivity where required. The compression joint design creates a secure mechanical seal without the need for soldering or adhesives, allowing for faster installation and simpler maintenance. The coupling is compatible with common plumbing tools and standard 20 mm pipe and 3/4" threaded fitting dimensions, enabling straightforward integration into existing systems.

Suitable for

• Connections between copper, multilayer and compatible plastic pipes and 3/4" threaded fittings
• Domestic and commercial potable water distribution
• Heating system pipework where threaded fittings are used
• Retrofit or repair work where soldering is impractical

Key specifications

• Material: brass with tinned finish for improved corrosion resistance
• Pipe outer diameter compatibility: 20 mm
• Threaded fitting connection: 3/4"
• Connection type: compression coupling for mechanical seal
• Typical application: water supply and heating systems

How to use

Prepare the pipe ends by cutting square and deburring to ensure a clean sealing surface. Slide the compression nut and compression ring onto the pipe, insert the pipe into the coupling until it reaches the stop, and tighten the compression nut by hand before securing with an appropriate wrench to the manufacturer’s recommended torque. Verify alignment and check for leaks after system pressurization. No soldering or special tools are required, but standard plumbing wrenches and pipe cutters are necessary.

Usage recommendations

Use on clean, undamaged pipe ends and avoid over-tightening the compression nut to prevent deformation of the pipe or ring. When connecting dissimilar materials, follow any relevant local codes and use suitable inserts or liners for thin-walled plastic pipes if specified by pipe manufacturer. Perform a pressure test after installation to confirm a leak-free joint.