Im a home owner who is going to install my second irrigation system. This one will be on sub. well 220 ft down. I know my well produces about 13GPM @ 45 PSI. If i size my heads to small and my pump runs 4 Minutes and off 30 seconds will this be a bad thing. Do I need to install a pump start relay to keep the pump on continuous when watering. This is the same pump for domestic water in the house. The recovery rate for the well is rated at 32GPM and I have verified that running at 11 GPM for 45 Min has not ran dry.