A John Guest fitting is an easy to use plumbing connection. It’s ideal for repairing leaks or temporary installations. The manufacturer offers a range of fittings that can be used with vinyl or polyethylene tubing. These fittings are also suitable for liquid transfer applications. In addition, they come with a 25-year warranty.
The John Guest Speedfit is a quick-connect fitting designed for speed it PEX pipe and copper pipe. This fitting has been tested to withstand extreme temperatures and has a US Plumbing Standards rating. This product is suitable for domestic hot and cold water lines, as well as hydronic heating systems.
How Do John Guest Plumbing Fittings Work?
A collet is used to hold the pipe firmly in place. It features stainless steel teeth and an O-ring for a secure seal. Before installing the fitting Reverse Osmosis, it’s advisable to test the system to make sure it’s secure.
The John Guest Twist & Lock fittings have EPDM O-rings. They are UV resistant and are suitable for general plumbing applications. If your fitting is leaking, you’ll need to replace the O-rings. Replacement O-rings are available in packs of six.
If you’re interested in a more permanent connection, you may want to consider SharkBite fittings. These quick-connect fittings are approved for underground use and for behind the wall applications. You’ll also need to use a special disconnect tool to disconnect these fittings.
When using a SharkBite fitting, it’s important to wrap the tube in an impervious material. If you do not, sunlight can cause the rubber O-ring to dry out. Afterwards, it’s advisable to use a lubricant to prevent corrosion and rust.
While both SharkBite and John Guest fittings are suitable for reusable and permanent connections, they do have slight differences. Unlike the former, the latter has a re-usable collet. Alternatively, you can install a locking clip between the collet and the fitting body to help you align the tube.
Compared to the SharkBite, the quick-connect fittings have fewer teeth on their collet, and require less hand tightening. It’s also easy to disassemble the collet and clean the threads, and then re-use the collet for another application.
Both SharkBite and John Guest fittings provide a seal that is durable and reliable. However, they are not recommended for use with soft copper tubing. Depending on the installation, most fittings will need to be replaced in the near future. Although it’s true that the lubricant wears off over time, the collet remains a good option for repair.
Before installing a fitting, you’ll need to cut the tubing to the correct length. Use a good pipe cutter to remove any burrs or sharp edges. Make sure that the backfill is free of rocks or soil. Once the tubing is square, push the fitting into the tube stop. Pressing down on the collet’s teeth will grip the tubing and create a permanent leak-proof seal.
The John Guest fittings are the original manufacturer of push-fit fittings. Over the years, they have been widely used in many different industries. Whether you’re looking to fix a leaking plastic pipe or need a push-in connection for a liquid transfer application, you’ll find the right solution with John Guest.