I have a problem with my Hydro Pneumatic Pump Tank that is used with my well in my home, I need help so I can fix this problem because I do not know what is wrong with my Hydro Pneumatic Pump Tank here is the problem while taking a shower or bath the water pressure drops after about 2 min then stops and there is no water at all then about 2 to 3 min later the water returns with much better water pressure and it will only last about 5 min then it slows and stops again it does this all the time can you possabley tell me the problem. Thanks.