Comap press-fit reducing coupling 40x3.5 to 32x3, press-fit copper pipe connector

Comap press-fit reducing coupling 40x3.5 to 32x3 is a press-fit copper pipe connector intended for creating a secure, flow-reducing transition between two copper tube sizes in heating and plumbing systems. The fitting enables a solder-free joint using standard pressing tools, providing a watertight and gas-tight connection suitable for potable water and central heating circuits. Constructed for compatibility with copper piping, the coupling supports reliable long-term service and can be used in concealed or accessible installations where a compact reducer is required.

Advantages

The press-fit design allows rapid installation without open flame, eliminating the need for soldering and reducing installation time. Made for copper-to-copper connections, the coupling provides consistent sealing performance when pressed with compatible pressing jaws and tools. Its compact reducing form factor minimizes space requirements and simplifies pipe routing during renovations or new installations, while offering corrosion-resistant copper construction suitable for potable water and heating applications.

Suitable for

• Reducing copper supply lines in potable water systems
• Transitions between radiator or central heating copper pipes
• Installations where solder-free, press-fit joints are required
• Renovation projects and tight-space plumbing runs

Key specifications

• Material: copper press-fit fitting
• Connection method: press-fit (mechanical pressing)
• Inlet size: 40 mm outer diameter, 3.5 mm wall thickness
• Outlet size: 32 mm outer diameter, 3.0 mm wall thickness
• Application: potable water and central heating systems
• Sealing: designed for watertight and gas-tight joints when properly pressed

How to use

Ensure pipe ends are cut squarely, deburred and cleaned of any contaminants before assembly. Insert each prepared copper tube fully into the respective end of the reducing coupling until it seats against the internal stop. Position compatible pressing jaws over the coupling at the designated press profile and activate the pressing tool according to the tool manufacturer’s instructions to form a permanent mechanical joint. After pressing, verify the connection visually and perform a pressure test in accordance with local regulations to confirm system integrity.

Usage recommendations

Use only pressing tools and jaws compatible with Comap press-fit profiles and follow applicable plumbing codes. Do not use the coupling on piping systems with incompatible materials or outside the intended pressure and temperature ranges. For concealed installations, ensure all joints are pressure-tested before closing walls or coverings.