Home » Shillafire » Piezometer Gauge Piezometer Gauge The coupling is attached with pressure gauge to be inserted between the nozzle or discharge outlet connected to the hydrant, monitor or fire hose, etc. to measure the pressure. Categories: Shillafire, Miscellaneous Tags: Miscellaneous, Shillafire You may also like… Pitot Gauge Pilot Bottle Pilot Cartridge Pressure Gauge Hydraulic Pressure Tester Related products Medium Expansion Foam Nozzle Gear-type Monitor (Medium-size) Gear-type Monitor (S-Type) Lever-type Monitor (SL-23WJ SERIES) Small Size Lever-type Monitor (Portable)