G.A. Murdock, of Madison, S.D., offers a full line of John Guest fittings, shut-off valves and polyethylene tubing. With over 3,000 products developed for applications involving foodstuff, potable liquids, air, etc., it’s the most reliable and cost effective solution available today. Made of acetal copolymer and polypropylene, the Super Speedfit® push-in fittings are available in inch and metric sizes. The fittings require no tools; plastic or soft metal tubing is inserted into the fitting collet to create a leak-proof connection.