New TELEDYNE 683-1-1/4-S2. Use with pressure gauge to measure pressure readings in multiple locations. Adapter with gauge is used to thread onto a tap which allows a pressure reading to be taken and then adapter can be removed and a check in the tap prevents any leakage. Multiple taps can be used throughout the system with one gauge to check all locations. Taps not included. 1/4" NPT. Shpg. 1/4 lb.