We just recently had our shallow well jet pump. The old pump was a 1/2 HP with a 30-50 switch on it. It was about 15 years old an finally died. I replaced it with a 1/2 HP Utilitech shallow well jet pump from Lowes that came with a 20-40 switch. Probably not a wise decision based on the reviews on the Lowes website, but I was in a bind and needed water. Since replacing the pump 2 days ago, we just don't have the water pressure in the house that we did before. I have 30 days to return the pump. I am wondering should I go back with a 1 HP pump? The one I bought will do 9 gpm. The 1 HP will do 21 gpm.....or should I try replacing the switch with a 30-50 switch.