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That would be my instinct for sure. Why have the pressure tank, then? Does it aid in consistent pressure?

I have a jet pump connected to a small pressure tank that is used to irrigate the garden from rainwater cisterns. The system is set for 30/50 psi cut on/off. If I run the irrigation fully open, the demand seems to be about 300 gal/hour, so 5 gal/min. This causes the pump to run continuously as...