PrintPressure Switches Low water pressure cut-off switchs offer an inexpensive way to protect your pump from running dry. Used on centrifugal pumps, jet pumps, well pumps & other domestic water pumps. Specs/Part #s Approx. Wt. Lbs. Min. Close Cut In Max. Open Cut Out 1 Phase 3 Phase Max Factory Setting Max Static PSI NEMA 1 Model Number 115V 230V 230V Munro Guard - Similar to 69WC7 (More Info) 1/2 32 12 1 1/2 2 3 12 150 LF10WR Approx. Wt. Lbs. Min. Close Cut In Max. Open Cut Out Diff. Range 1 Phase 3 Phase Factory Setting NEMA 1 Model Number 115V 230V 230V 460/575V For Water Systems 1/2 3 35 4-8 1 1/2 2 3 -- 5-10 FU69WA3 1/2 5 90 10-30 1 1/2 2 3 -- 30-50 FU69WA43050 For Air Systems 1/2 25 100 20-40 1 1/2 2 3 -- 80-100 FU69MB6 1/2 40 150 30-40 1 1/2 2 3 -- 95-125 FU69MB7 Higher Ratings For Air Systems 1/2 40 250 35-60 2 3 5 5 115-150 FU69HA1 1/2 10 125 20-35 2 3 5 5 100-125 FU69HA2 Reverse Action For Water or Air 1/2 80 10 17-22 1 1/2 2 3 -- 50-30 FU69WR5 1/2 40 3 6-15 1 1/2 2 3 -- 10-5 FU69WR3 Approx. Wt. Lbs. Min. Close Cut In Max. Open Cut Out Diff. Range 1 Phase 3 Phase Fixed Low Pressure Cut Off Factory Setting NEMA 1 Model Number 115V 230V 230V Gard-All 1/2 10 70 10-30 1 1/2 2 3 6 20-40 FU69WEC Hi-Gard 1/2 20 100 -- 1 1/2 3 5 -- 80 FU69WH6