I'm having pressure problems. When water turned on pressure drops to almost nothing at faucet and then pump turns on and gradually pressure is great. The pump is 1/2 hp shallow well with 20 gal bladder tank. i dont know pressure settings and dont have a gauge to give pressure on tank but i used a tire gauge to check pressure on tank and it went off the scale of 48 psi. This system has been operating for 10 years with no problems till now. The pump is very loud and i am going to replace it. Do you think the pump is my problem or is maybe something else also a problem. Pump also runs for what seems a long time. If toilet is flushed pump runs for almost 2 minutes. Thanks