Depends on what you have for a pump system. A good pump can produce 60 PSI and coupled with a Cycle Stop Valve (CSV) can provide near constant pressure as well.
The first question would be how/why the pressure switch is set to 30-40? Most switches have a differential of 20 PSI so 20-40 or 30-50 is more to be expected. Do you have a micronizer that may limit the range?





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