Is that 24 volt powering pump the pump AC or DC? Is that a solar- or wind-charged battery? Most pressure switches are not rated for DC, although you are probably fine. How many amps does the pump draw... just curious.
I am thinking that you would be more interested in minimizing power consumption than somebody plugged into $0.12/KWH electricity. You would use less power if your pressure switch was set to 30/50 PSI compared to using 40/60. So if 30/50 does the job, I would tend to get a pressure switch that is preset to that. If you use the search feature on the Grainger website, I remember seeing a selection criterion that lets you select that. I chose that for the Grainger link that I put into post #15.
Using only one side of a 2-pole switch is not wrong. But paralleling sides will give it a little more capacity to carry the amps.
I am thinking that you would be more interested in minimizing power consumption than somebody plugged into $0.12/KWH electricity. You would use less power if your pressure switch was set to 30/50 PSI compared to using 40/60. So if 30/50 does the job, I would tend to get a pressure switch that is preset to that. If you use the search feature on the Grainger website, I remember seeing a selection criterion that lets you select that. I chose that for the Grainger link that I put into post #15.
Using only one side of a 2-pole switch is not wrong. But paralleling sides will give it a little more capacity to carry the amps.
Grainger does not have a showroom. They are aimed at the professional and industrial crowd. I think it used to be that they would not even sell to DIYers. They may not have everything in stock. I suggest placing your order through the web, and just picking up your stuff at "will call". That will save time for you too, including not having to make a return trip.I'll be going to Grainger's..
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