These 12mm John Guest pipe inserts are essential for creating secure and reliable push-fit connections with 12mm outside diameter (O/D) semi-rigid water pipe – commonly used in campervans, motorhomes, caravans, and marine water systems.

Key Features:

• Suitable for 12mm O/D semi-rigid pipe

• Essential for use with JG Speedfit push-fit or compression fittings

• Prevents pipe distortion and improves connection reliability

• Ensures pipe remains round and firm, especially after cutting

• Can be used in both hot and cold water systems

Why Use Pipe Inserts?
Pipe inserts provide crucial support at the end of the pipe, helping maintain its shape and integrity when inserted into push-fit or compression fittings. This prevents leaks and ensures long-term performance – especially in pressurised or heated systems.

Available in various pack sizes – choose the quantity that suits your project.

✅ Compatible with John Guest / Speedfit 12mm pipe
⚠️ Always use inserts when making any push-fit or compression connection to ensure a secure seal.

Look at our other listings or visit our shop, for the full range of pipe/fittings/pumps/filters & accumulators for all of your requirements.