Question: Square D Pressure Switch

[questover]

I have a 1987- 58 MY with the orginal galleymaid fresh water system. Question: I want to replace the Square D Pressure switch with one that has a low pressure cut- off. (Square D Pressure Model fsg 2j20m4cp 20-40 psi Pumptrol.)

The reason for the replacement is that when you run out of fresh water the existing switch lets the pump run till it burns up. I have talked to Square D factory TECH/ They say they do not make a switch that runs on 32 volts.

My existing switch is Square D Class 9013 Type fsg form m4 volts 115v - 230v. But runs on 32Volts. There should be more numbers after Class 9013. Mine have rubbed off. If anyone could get me the missing numbers I would appreciate. Also has any one replaced their old switch with one that has low pressure cut-off. Thanks Russ

 

[MikeP]

The switch doesn't really "run" on any particular voltage, it just has a spring loaded pressure switch that trips based on pressure in the system. There is no coil and therefore no concern about voltage.You can connect the 32V pump to it with no issue at all.

They are available at just about any hardware store. Our boat's system originally came with the version that included the low pressure cut-off switch and when it finally gave up the ghost after 30-some years I replaced it with the same switch from the local tru-value hardware store.

 

[questover]

Mike, thanks for the information. I really over thought this. I do not understand why the factor tech said it woud not work on 32 volts.