I have not spent any money on a PSV or the relay yet. (I had the relay last year when things worked).
OK, I understand that the jet pump recirculates. Maybe I'm not being clear, but IF I had a centrifugal pump...say 1 HP, shut off pressure of 45 psi. I hook it up to my pump relay controlled system. Out of the 50 or so people in my area that have a point well and sprinklers, seriously 1 has pressure tank. They can't all have this issue. Anyway, wouldn't my hypothetical 1 HP centrifugal pump have the same issue I'm having now? If the shut pressure is 45 psi, I'd get a PSV in that neighborhood, but if it dead heads for 2 sec before the valve opens, it won't really do me much good...