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The John Guest Group of Companies is the world's leading manufacturer of high quality push-in fittings, pipe and plastic plumbing systems to a wide variety of industries and applications such as Drinks Dispense, Plumbing, Pneumatics, Compressed Air Systems, Water Purification, Drinks Vending, Automotive and Telecommunications.
The concept of push-in fittings was pioneered by John Guest and there are now many millions in service around the world. As more and more installers and Original Equipment Manufacturers begin to see the benefits in labour saving and reliability offered by their fittings the old methods of tube connection, such as compression and barb fittings, are being replaced by push-in technology. John Guest through our distributor Autoquip now offer a comprehensive range of over 3,000 products addressing virtually every tubing and pipe connection requirement imaginable.
Across a host of applications, John Guest products require no special tools. Simply cut the tube square and insert it into the fitting to effect a secure and reliable connection. Thus, our products offer the most reliable and cost effective solution to tubing connections.
Making a connection with John Guest Fittings : -
Step 1 - Prepare the connection
Cut the pipe square ensuring it is free of score marks. When using Speedfit BPEX barrier pipe, cut along an insertion mark. We recommend the use of one of the John Guest pipe cutters. For soft or thin walled plastic pipe we recommend the use of a tube insert or pipe insert.
Step 2 - Assemble the connection
Connecting 28mm fittings for compressed air applications
Like all smaller size fittings, the new 28mm fittings have a collet with stainless steel teeth and an 'O' Ring to provide the unique grip and seal connection. The fitting can also be demounted and used again without the need for replacement parts.
As with other sizes, the pipe should be properly prepared and inserted fully into the fitting (to the end of the internal tube stop). By turning the screw cap by approximately ¼ turn (2 clicks can be heard) the collet is locked in place and further compression of the 'O' Ring on the pipe is achieved. It will be noticed that by locking the collet in place there is reduced lateral and sideways movement of the pipe.
Disconnecting 28mm fittings for compressed air applications
To release the pipe from the locked position, turn the screw cap anti-clockwise approximately ¼ turn.
Now it can be released like a normal Speedfit connection by pushing in the collet and pulling the pipe out.
Step 3 - Verify the connection
It is recommended (and good practice dictates) that you remember to pressure test the completed installation before use.
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