15mm John Guest Tube Insert

Secure your John Guest plumbing fittings with this 15 mm Tube Insert. It reinforces the end of 15 mm plastic tubing, giving the pipe added strength and helping maintain a solid seal in push fit connections. By supporting the tubing from within, it prevents compression or distortion, especially in softer or thin walled pipe.

Well suited to caravan plumbing fittings, marine systems, and light commercial setups, the insert helps ensure each push fit connection stays reliable over time.

Key Applications

• Caravan and RV plumbing systems

• Marine water and tank setups

• Low pressure domestic or commercial plumbing

• Portable filtration and water delivery systems

Product Features

• Supports 15 mm plastic tubing at connection points

• Helps prevent tube collapse and maintains a clear sealing surface

• Designed for all 15 mm John Guest push fit fittings

• Simple to install by inserting before connection

• Made from durable acetal

Why Choose John Guest Fittings?

John Guest fittings are known for secure push fit plumbing across domestic, mobile, and commercial systems. The 15 mm tube insert plays a key role in keeping connections steady and long lasting.