Brass soldered tee Comap MultiSkin 20x3/4x20 (tin-plated) for plumbing connections

Brass soldered tee Comap MultiSkin 20x3/4x20 (tin-plated) is a plumbing fitting designed to connect two 20 mm solderable pipes with a central 3/4" female threaded branch. The part combines solderable ends for copper or multilayer pipes with a threaded outlet, enabling secure transitions between soldered pipework and threaded components in heating and potable water systems. The tin plating on the brass body provides a uniform surface for soldering and improved resistance to oxidation during assembly.

Advantages

The Comap MultiSkin tee offers reliable mechanical strength due to its brass construction and a tin-plated surface that facilitates soldering and reduces the risk of flux-related corrosion. Its combination of solderable ends and a female threaded branch simplifies integration of valve bodies, meters or branch piping without adapters. The fitting is compact, suitable for confined spaces, and designed to provide leak-tight joints when installed according to standard soldering practice.

Suitable for

• Domestic and commercial potable water distribution
• Heating system pipe connections and branch outlets
• Transitions between copper or multilayer (composite) pipes and threaded components
• Repairs and retrofits where a soldered-to-threaded junction is needed

Key specifications

• Material: brass with tin plating on the solderable surfaces
• End connections: two solderable ends for 20 mm pipe
• Branch connection: female threaded 3/4" outlet
• Suitable pipe types: copper and multilayer/composite pipes that accept solder joints
• Typical applications: plumbing and heating systems

How to use

Prepare the pipes by cutting square, deburring and cleaning the 20 mm pipe ends and the solderable surfaces of the fitting. Apply appropriate flux to the joint area and assemble the fitting onto the pipes, ensuring correct alignment. Heat the joint evenly with a suitable torch until solder flows and forms a continuous capillary fillet; allow the joint to cool naturally without disturbance. Threaded connections to the 3/4" female branch should use appropriate sealing method for the intended system (e.g., PTFE tape or thread sealant) and be tightened to recommended torque values for the mating component.

Usage recommendations

Use qualified personnel experienced in soldering and thread sealing for potable water and heating systems. Verify compatibility of pipe materials and follow local plumbing codes and safety guidelines. Avoid overheating the tin-plated surfaces to prevent damage to plating; clean flux residues after cooling to minimise corrosion risk.