John Guest, a Reliance Worldwide Corp. brand, is a manufacturer of engineered push-fit fittings, valves and LLDPE tubing, ranging in sizes from 1/4” to 1/2” OD and 1/2”, 3/4” and 1” CTS in a variety of configurations for potable water and traditional plumbing applications. John Guest fittings are easy to use and require no tools to make reliable, leak-free connections, the company notes. John Guest products are lead-free and are listed with NSF standards 14, NSF61, CSA standards PW and IAPMO plumbing codes. They are ideal for use in reverse osmosis and filtration systems, automatic coffee brewers, ice-makers and more.

John Guest.