The Pressure Tester allows the inducement and measurement of water or air pressure in a plumbing system with the simple turn of a handle. A versatile quick connect coupling systems used in conjunction with our Standard Open Plugs allows access to virtually any plumbing connection without cutting lines or depending on leaky threads. Unit is all brass & stainless steel construction with a 30 PSI pressure gauge. Air connection is a 1/4" quick connect insert. Water connection hooks to an ordinary garden hose.