We have no water. Replaced the pressure switch on the bladder tank, but the water coming from the well will go straight to the faucets, the tank will not fill. The gauge on the tank goes to about 20 then drops to zero. There was a lot of sediment or rust in the small pipe leading to the pressure switch, could it be a clogged pipe? The cold water bladder tank was installed in 1997. Any tips for trouble shooting before I have to call a plumber would be greatly appreciated. Thanks!