174. Suppose the pressure switch used to control the «lead» potable water pump is set at 45 psig cut-in for pump start and 55 psig cut-out for pump stop. What would be an appropriate setting for the «lag» potable water pump?

The lag pump's cut-in pressure should be lower than the lead pump's to ensure the lead pump handles normal demand and the lag pump only activates when needed, while both pumps should have the same cut-out pressure to avoid overpressure and inconsistent shutoff.