John Guest is a British engineering and manufacturing brand, founded in 1961, that pioneers push-fit (“Speedfit”) pipe and tube connection systems, and produces a wide range of plastic and metal fittings, tubing, valves, and fluid-control solutions for markets including plumbing and heating, beverages, compressed air and pneumatics, telecoms, automotive, and OEM sectors. It maintains a vertically integrated supply chain with in-house design, tool-making, and production, aiming for high quality and responsiveness to customer and market demands. The company now forms part of the Reliance Worldwide Corporation (RWC) family following
