Well Pump Won't Build Pressure

[D3adlyDesignz]

Recently I noticed that my pressure tank was leaking from under the tank. This was just after I noticed that my electric bill was 100 a month extra. Come to find out my on off setting wasn't allowing my pump to turn off. With some adjusting I could get it to turn on at 10psi and off at 35 psi. Since then I installed a new 3 stage filter system and pressure tank and no more leaks! After installation I turned my pump on and watched the gauges. All built to about 30 psi quickly and it took around 3 mins or so to reach the 35 psi the switch was set at. As soon as it reaches the 35 psi it turns off and the pressure drops under 10 psi immediately causing the pump to switch constantly on and off. There is a valve just inside the home before the pressure tank and if I close this valve as soon as the pump turns off it will hold pressure without any issue. But you guessed it right! As soon as I re open this valve it then causes the pressure to instantly drop. What could this be caused by? Bad Foot Valve? Leak Between the Pump and the home? I'm heading to the hardware stone in the a.m. and will be installing a check valve just inside the home before the pressure tank to see if I can come up with a quick fix. Any help will be greatly appreciated.

 

[D3adlyDesignz]

I've also attached a picture for a better explination. The Orange is where I will be installing a additional check valve. The green valve is the valve I can close when pressure is reached and it holds pressure until I re open.

 

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[Craigpump]

#1, you don't want that valve installed there. If, by some chance it got closed & the pump came on, the pump would be deheading against a closed valve. A good way to burst a pipe and/or destroy the pump.

As for your problem, sounds like you have a hole in the pipe/split pipe/split coupling/rotted out fitting/blown Oring in your pitless or broken offset. Installing a check valve will do nothing to fix any of those problems and your electric bill will still be high.

 

[Reach4]

As soon as I re open this valve it then causes the pressure to instantly drop. What could this be caused by? Bad Foot Valve? Leak Between the Pump and the home?

Where is the pump? If the pump is down the hole (submersible), there is not a foot valve, but there is a check valve at the pump that may have failed. Or there is that leak between the house and the check valve.