My son bought a house with a well. The new well is 500' from the house, down a 75' incline. There is a 40 gallon tank at the pump. The pressure is set a 120 lbs. A 1" line runs all the way to the basement. 50lbs of pressure at the filter, in the basement. As soon as a faucet is turned on the pressure drops to 30 lbs. There is just a trickle of water on the first floor. Probably looking at 85' - 90' drop to the well from the shower on the first floor. How do we get the pressure up? Do I need another tank and pump in the basement.