The Netafim Liquid Filled Pressure Gauge measures from 0 - 100PSI. Use it together with the Netafim 17 mm Combination Tee (32500-005055) to monitor the water pressure on the table. Netafim Liquid Filled Pressure Gauge is compatible with Netafim 17mm Combination Tee 2-Way Insert. Notes Requires 1/2" x 1/4" Sch 40 TxT Reducer The Netafim Liquid Filled Pressure Gauge measures from 0 - 100PSI. Use it together with the Netafim 17 mm Combination Tee (32500-005055) to monitor the water pressure on the table. Netafim Liquid Filled Pressure Gauge is compatible with Netafim 17mm Combination Tee 2-Way Insert. Requires 1/2" x 1/4" Sch 40 TxT Reducer