How to Connect John Guest Plumbing: A Step-by-Step Guide

The John Guest push-fit plumbing fittings are a favourite for caravan, RV, and home water systems because they’re reliable, easy to use, and require no special tools. Here’s how to connect John Guest plumbing securely, ensuring a leak-free setup every time.

Why Use John Guest Plumbing?

John Guest fittings allow for quick, strong connections that require no adhesives or complex tools. The push-fit technology makes them especially useful in caravan and RV plumbing, where ease of assembly and durability are essential.

What You’ll Need

To make reliable connections, gather these essentials:

• John Guest cutting tool – ensures clean, straight cuts.
• John Guest fittings (elbows, tees, straight connectors, etc.)
• Tube inserts – to maintain tube shape and improve seal.
• Locking clips – for added security under pressure.

Step-by-Step Guide to Connect John Guest Plumbing

1. Cut the Tube Cleanly
   • Use the John Guest cutting tool to make a straight, even cut across the tube. Avoid using a hacksaw, as it can leave burrs that compromise the seal and connection quality.
2. Insert a Tube Insert
   • Place a tube insert into the end of the tube. This step is essential as it keeps the tube’s shape intact, helping create a tight seal and preventing the tube from deforming under pressure.
3. Push the Tube Firmly into the Fitting
   • With the tube insert fitted, firmly push it into the John Guest fitting until it reaches the internal stop. You’ll feel a slight resistance, which is normal; keep pushing until it’s seated securely.
4. Secure with a Locking Clip
   • Attach a locking clip to the connection to secure the fitting to the tube. This additional step ensures the fitting won’t separate from the tube, even when the system is pressurized.

Important Tips for a Reliable Connection

• Use Only the Recommended Cutting Tool: The John Guest cutting tool provides a clean cut essential for a proper seal.
• Always Use Tube Inserts: Tube inserts help the tube maintain its shape, making the connection stronger and more reliable.
• Add Locking Clips: Locking clips prevent accidental disconnections, especially useful in systems with high water pressure.

Applications for John Guest Plumbing

John Guest fittings are versatile and ideal for:

• Caravan and RV Water Systems: For fresh and wastewater systems, making it easy to set up and modify as needed.
• Household Water Filtration Systems: Perfect for DIY water filtration setups.
• Outdoor Plumbing Projects: Useful for temporary or mobile water connections in gardens or outdoor kitchens.

Troubleshooting Common Issues

• Leaks: Ensure the tube is fully inserted and has a clean cut. Re-cut the tube if necessary, reinsert the tube insert, and try again.
• Connection Difficulties: If removal is needed, press the collar down while pulling the tube out.

With these steps, you can confidently set up or repair John Guest plumbing systems, ensuring secure, watertight connections for any application. Whether you’re on the road or setting up a home water system, John Guest plumbing fittings make DIY connections easy and dependable.