My well pump pressure switch is a Square D, 30 to 50 psi.
I've changed it about three times over the last 20 years or so.
In addition, I had a High Pressure Safety Cutoff Switch installed.
This operated at a HIGHER pressure than the 50 PSI cutoff in the pressure switch mentioned above.
I had it set at 63 PSI.
In case the 50 PSI of the normal pressure switch fails, the Safety Cutoff Switch will turn the pump off.
This switch looks almost like the normal pressure switches, but serves just one purpose; high pressure.
The one I had lasted 25 years and failed.
I cannot for the life of me find a switch like this online.
The one I threw out was a Johnson Controls 2 pole pressure switch, 80 PSI (adjustable).
Does anyone know if they still make these?