John Guest, an RWC brand, is a manufacturer of engineered push-fit fittings, valves and LLDPE Tubing, ranging from ¼ to ½ in. in outside diameter and 3/8 to 1 in. CTS sizes. The fittings are available in a variety of configurations for a wide range of markets, including water filtration/treatment, beverage dispensing, agricultural/hydroponics, car wash, and marine/RV markets. John Guest products are manufactured from FDA approved materials, lead-free and they are ideal for use in confined spaces. Fittings are easy to use and require no tools to make reliable leak-free connections. John Guest products are listed with NSF International Standards 14, 61, CSA standards pw and IAPMO plumbing codes.