Low water pressure with new well pump system

I had a new well water system installed with a new 4" Goulds 1/2 HP submersible pump, 40 gallon pre-pressurized tank, 30/50 pressure switch. The depth is 30' and I have a good water supply with no sediment or air pockets in the water draw. The guy who did the work down and out with a back injury and I need to find a remedy before our annual wet toga pool party. The pressure is initialy good, however, it quickly dimenishes to a trickle after 10-15 seconds, the pressure builds back up fairly qucik but is is anoting to keep waiting for it to come up. I can see that the siwtch is kicking in the pump at around 30PSI and shutting it off at 50PSI. The problem is the water is marginally tollerable when I take a shower, I can't rurn on my inside faucet when the garden hose is running, and I'll be more worried when I try to clean my second level wood deck with a power washer. I understand that hte pressure should drop however, I did not expect that much of a drop. Should I step up the low side pressure or go to a 40/60 pressure switch? Is my inline filter dimenishing the pressure? What are my options and trouble shooting sceme for this situation? Cheers
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natureboy wrote:

Bet installing the new pump stirred things up. Your filter may indeed be clogged and the problem.
Jim
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