On Fri, 14 Aug 2020 07:41:20 -0700 (PDT), "
wrote:

On Friday, August 14, 2020 at 9:38:59 AM UTC-4, Ron D. wrote:
Comments:

1. use a definite purpose contactor.

2. the pressure switch might have a minimum load, so if those contacts are used to switch a relay coil, they may fail.
http://store.flw.com/content/100608/...ure-switch.pdf

I also think that putting the pressure switch next to the well-head is a good idea. The tank really does not care where it is in the system.

Peter Wieck
Melrose Park, PA
Water well pressure switches should always be placed as close to the
pressure tank as possible. Within 1 foot is best. Nearly 300 feet away
at the well head would be a bad idea.
Eric