The JG Speedfit “Superseal” Pipe Insert 15 mm is a purpose-made internal support insert designed for use with 15 mm plastic pipework when installing Speedfit push-fit fittings. It helps ensure a strong, secure, and reliable joint by reinforcing the pipe end where it enters a push-fit connection.

Function & Purpose

When connecting plastic pipe to a Speedfit push-fit fitting, the natural flexibility of the pipe can sometimes allow slight compression or distortion at the connection point. The “Superseal” pipe insert is pushed into the end of the pipe before fitting, providing internal support so the pipe retains its shape. This improves the seal between the pipe and the fitting’s O-ring and grip ring, helping prevent leaks and premature joint failure, especially in high-duty or frequently serviced installations.

Compatibility

This insert is designed specifically for 15 mm pipe compatible with JG Speedfit push-fit systems. It works with most plastic pipe types used in plumbing and heating applications where internal pipe support improves connection integrity.

Design & Build Quality

The “Superseal” pipe insert is manufactured from a durable, rigid material that resists deformation, ensuring firm internal reinforcement of the pipe end. Its design allows easy push-in installation without special tools, and once fitted it stays securely in place to support the pipe under normal operating conditions.

Ideal Applications

This 15 mm Superseal pipe insert is ideal for use with Speedfit push-fit fittings in both plumbing and heating systems. It is particularly recommended where pipe stiffness is needed for reliable connection performance, such as on longer plastic pipe runs, behind radiators, under floors, or in locations where frequent installation adjustments or maintenance might occur.