John Guest is a leader in push-in fittings and pipe and plastic plumbing systems. Many plumbing installers see the benefits in labor savings and reliability offered by the line of John Guest Speedfit push-in fittings. John Guest Speedfit is a push-fit system used in the plumbing of hot and cold water services and central heating applications, including pressurized and combo systems. John Guest Speedfit fittings are designed for plumbing use with both Speedfit and copper pipe. Fresh Water Systems offers a wide collection of these fittings, shut off valves, and PEX tubing for all your plumbing needs at the best prices.