![]() It would be good to make sure to have an isolation valve for each service before the tanks. Besides, both tanks will be supplied from one common line, so the operation is still limited to the single well pump, you are just branching off of the system. So I’m thinking that if the check valve for the system above ground is positioned before both tanks then just one pressure switch will be controlling the pressure of the whole system, therefore a second pressure switch may not be required. The operation of the pump to maintain the pressure of the system will depend on the position of the check valves and the pressure switch. If I am not mistaken, there is a check valve between the well pump and the pressure tank to prevent back flow to the well, and there should be a check valve on the top of the pump as well.
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