|Posted by Gary Slusser on December 19, 2003 at 13:50:25:|
|In response to Re: Water pressure tank|
: Water pressure is good but will suddenly go from good pressure to no pressure (0#) at the tap. It will stay at no water for about 5-10 seconds and as suddenly as it stopped it will start again with good pressure. It does not keep going down, and down, and down. It goes from good to zero to good.
: I watched at the pressure gage at the pump and this is what is happening. Pump runs to 85# and stops, pressure goes down to 35# pump starts pressure drops to zero, pump continues to run, suddenly pressure jumps from zero to 35# and pump continues to max pressure, 85#
: What is going on, HELP!!!!!
I suggest your pressure switch nipple or the tubing to the switch on a jet pump or it's fittings are blocked. That causes a lag in the switch sensing the pressure change and allows the pressure tank to fully empty, which normally it doesn't do because the pump comes on before the tank empties.
Or you have a stuck closed check or foot valve. or you have a check valve on the inlet to your pressure tank and the one in/on the pump or foot valve in the well is not closing and the water in the line is leaking out. That would be due to a leak in the plumbing before the pressure tank.
Also, you have the cut-off way too high. That 50# differential will allow you to notice the pressure falling much more than the reccommended 20# all switch and pump manufacturers suggest. And if your pressure tank is done to code, the pressure relief valve is a 75# valve.
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