John Guest

John Guest is a British push-fit fitting manufacturer founded in 1961, inventor of the push-in tube connector concept in 1974. John Guest produces JG Speedfit push-fit fittings, valves, tubing, and manifolds for water treatment, plumbing, beverage dispensing, HVAC, and industrial applications. Distributed through plumbing and HVAC wholesale channels including SupplyHouse.

John Guest Product Lines

• JG Speedfit Push-Fit Fittings: Elbows, tees, couplings, reducers, and caps for 1/4 inch to 1 inch OD tubing.
• JG Speedfit Valves: Push-fit ball valves, check valves, and shut-off valves.
• Semi-Rigid PE Tubing: Polyethylene tubing for water supply, water treatment, and ice maker connections.
• Manifold Systems: Multi-port manifolds for water filtration distribution.
• Beverage Fittings: Push-fit fittings for dispensing, coffee, and food service equipment.
• Industrial Push-Fit Fittings: Compressed air and industrial fluid control fittings.

Why Contractors Specify John Guest

John Guest Speedfit eliminates soldering, crimping, and compression tools for small-diameter tubing connections. Fittings are reconnectable for service access and NSF 61 listed for potable water in appropriate materials.

How to Choose a John Guest Product

Match the fitting to the tubing OD and required function. Select acetal copolymer for cold potable water; polypropylene for higher-temperature applications. Verify NSF 61 listing for drinking water use. Confirm tubing material compatibility with the John Guest compatibility chart.

Frequently Asked Questions

• Compatible tubing? Semi-rigid PE, nylon (PA), and HDPE in the matching OD.
• How push-fit works? Collet ring grips tubing OD on insertion; press collet to release and pull tubing out.
• Drinking water safe? Yes, NSF 61 listed in appropriate material.
• Reusable? Yes, multiple disconnect/reconnect cycles; inspect tubing end before reuse.
• Max pressure rating? Up to 150 psi at cold water temperatures.