All piping must be installed with valves. Gate valves have a gate inside. Glove valves have a glove inside. Check valves have a check inside. Angle valves have an angle inside.
Plug valves have a plug inside.
Diaphragm valves have a diaphragm inside. All completed piping lines must go somewhere and connect to something. The fitter is required to verify this before turnover. For more information on the Tulsa Computer Society click here This page has been accessed times.