OVERVIEW:Water Pump Pressure Switch. 30 - 50 PSI. 1-Phase, 115V AC, 1.5 Hp, 20 Amp / 230V AC, 2 Hp, 12 Amp. NEMA 1 Enclosed. Diaphragm Actuated. Plumbing Connection: 1/2" with 3/4" Nut.Features:Removable cover with captive screw to ensure no loss of screw during installation.Ample wiring space for e..