Pressure Switches For Water Pumps

Centripro pressure switch for water pumps 2 HP # AS4 30 PSI cut-in, 50  PSI cut-out; adjustable with maximum pressure setting of  60 PSI cut-in  and 80 PSI cut-out; will handle single phase 1-1/2 HP @ 115 Volts and 2  HP @ 230 volts,  also 3 HP @ 230 volts three phase. It has 1/4 FNPT  (Female pipe thread) bottom connection. Replaces Furnas pressure switch  69ES1. 

Furnas Pressure Switch with 1/4" FIP connection, 30-50 PSI (60-80 PSI maximum setting), rated 2 HP @ 115 Volts, 3 HP @ 230 volts single phase, 5 HP @ 230 volts three phase, 1/2 HP @ 115 volts DC,  1/2 HP @ 230 volts DC,  1/4 HP @ 32 volts DC.  

Harvard pressure switch for water pumps 2 HP # CPS3050 30 PSI cut-in,  50 PSI cut-out; adjustable with maximum pressure setting of 60 PSI  cut-in and 80 PSI cut-out; will handle single phase 1-1/2 HP @ 115 Volts and 2 HP @ 230 volts. It has 1/4 FNPT (Female pipe thread) bottom  connection. Replaces Furnas pressure switch 69ES1. 

The Gard-it switch is wired in series with a conventional pressure  switch. If pump loses it's prime the system pressure will fall  considerably below the cut-in point of the regular pressure switch.   Gard-it will disconnect the pump motor. The system is placed in  automatic operation by depressing the manual reset lever until the  system pressure exceeds the Gard-it cut-off level