John Guest has a long established reputation as a world-leading supplier of Fluid System Products. This reputation is built on consistently producing high quality products with an ongoing commitment to growth and innovation. Combine these with our superior product reliability and customer service and you’ve got a partner you can really count on. John Guest is an ISO 9001 registered company and is listed as a preferred supplier by many leading international companies. In all applications John Guest Super Speedfit fittings require no tools. Tubing is simply inserted into the fitting collet to effect a secure connection. Whether plastic or soft metal tubing is used, the integrity of the connect