John Guest 12mm Pipe Inserts (TSM1209S)

The John Guest 12mm Pipe Insert is an essential component for securing reliable connections in campervan, motorhome and caravan water systems. Designed for use with 12mm semi-rigid or plastic pipe, this insert reinforces the pipe wall to ensure a secure, leak-free push-fit connection when used with John Guest Speedfit fittings.

Simple but crucial, the pipe insert prevents pipe distortion under pressure and helps maintain a long-lasting seal inside the fitting. It is particularly important in hot water systems where pipe expansion can occur, providing additional stability and durability in mobile and off-grid environments.

Quick and easy to install, the insert simply pushes into the end of the pipe before connecting to your fitting — no tools required.

Key Features

• Designed for 12mm pipe systems
• Compatible with John Guest Speedfit fittings
• Reinforces pipe for secure push-fit connections
• Helps prevent leaks and pipe distortion
• Suitable for hot and cold potable water systems
• Ideal for campervan, caravan & motorhome plumbing

Typical Uses

• Fresh water plumbing in van conversions
• Hot water heater connections
• Water pump and accumulator installations
• General 12mm push-fit plumbing systems

A small but vital component, the John Guest 12mm Pipe Insert ensures your campervan plumbing system remains safe, secure and professionally installed.