Conex reducing connector series 5000 18 x 15 mm pipe fitting

Conex reducing connector series 5000 18 x 15 mm pipe fitting is a stepped adapter designed to join tubes of different outside diameters in plumbing and heating systems. Manufactured by Conex, this fitting provides a secure transition from an 18 mm pipe to a 15 mm pipe and is intended for reliable fluid and gas conveyance in residential and commercial installations. The component is part of the series 5000 family and is suitable where a compact and robust reduction coupling is needed.

Advantages

The Conex reducing connector offers a precise, tight fit between 18 mm and 15 mm pipes, reducing the risk of leaks and maintaining flow integrity. Its compact design allows installation in confined spaces and simplifies routing where pipe size changes are required. The fitting is compatible with common installation practices in plumbing and heating, providing consistent mechanical strength at the transition point.

Suitable for

• Connecting 18 mm to 15 mm copper or compatible metal pipes in domestic plumbing
• Reducing pipe size in heating circuits, radiators, and underfloor heating manifolds
• Transitions in commercial potable water and chilled-water systems
• Repairs or retrofits where an existing 18 mm line must be adapted to 15 mm piping

Key specifications

• Function: stepped reducing connector for pipe size transition
• Connection sizes: 18 mm to 15 mm outside diameter
• Application: potable water, heating, and general fluid/gas conveyance where materials are compatible
• Design: compact reduction fitting suitable for tight installation spaces
• Compatibility: intended for use with standard metal plumbing pipes that fit the specified diameters

How to use

Prepare both pipe ends by cutting squarely and deburring to ensure full insertion and a leak-free joint. Select the appropriate joining method based on pipe material and local standards (for example, soldering, compression jointing, or approved mechanical joining technique). Fit the 18 mm end onto the larger pipe and the 15 mm end onto the smaller pipe, ensuring full engagement. Complete the joint following the chosen installation method and pressure-test the system according to local regulations.

Usage recommendations

Verify compatibility of pipe material and joining method before installation; follow applicable plumbing and heating codes for soldering, brazing, or mechanical jointing. Perform pressure and leak testing after installation, and avoid exposing the fitting to aggressive chemicals or conditions not suitable for the pipe materials used.