Cooch17
New Member
Greetings --
I have a 1500 gallon underground cistern, which is fed by my shallow, low yield well (once an hour, water shoots over from well to the storage tank). I have a submerged pump in the storage tank that serves water to the two pressure tanks I have in the basement of the house. 60/40 pressure switch.
Recently, I've noticed something I find 'odd' -- when the pressure hits 40, and switch calls for water, all fine. Pump pushes water from underground storage tank into pressure tanks - hits 60 psi, and kicks off with a fairly noticeable 'thump'. But...what happens next is what puzzles me. Within the first 30-60 seconds after the pumping kicking off, I lose pressure - not a lot, but enough to make me post this question. In those 30-60 seconds, pressure drops from 60 psi to ~53-55 PSI. And then, it simply sits there (i.e., no longer decreases). If it continued to decrease, I'd think leak in the usual sense, but, it doesn't -- it simply drops 5-7 PSI, and then...sits there.
So, what might be the cause of the initial pressure drop after the pump shuts off? I'm *guessing* footer or check valve back-leak, but I'm not sure -- which is why I'm asking. Am looking for ideas to run past my well guys.
Many thanks in advance...
I have a 1500 gallon underground cistern, which is fed by my shallow, low yield well (once an hour, water shoots over from well to the storage tank). I have a submerged pump in the storage tank that serves water to the two pressure tanks I have in the basement of the house. 60/40 pressure switch.
Recently, I've noticed something I find 'odd' -- when the pressure hits 40, and switch calls for water, all fine. Pump pushes water from underground storage tank into pressure tanks - hits 60 psi, and kicks off with a fairly noticeable 'thump'. But...what happens next is what puzzles me. Within the first 30-60 seconds after the pumping kicking off, I lose pressure - not a lot, but enough to make me post this question. In those 30-60 seconds, pressure drops from 60 psi to ~53-55 PSI. And then, it simply sits there (i.e., no longer decreases). If it continued to decrease, I'd think leak in the usual sense, but, it doesn't -- it simply drops 5-7 PSI, and then...sits there.
So, what might be the cause of the initial pressure drop after the pump shuts off? I'm *guessing* footer or check valve back-leak, but I'm not sure -- which is why I'm asking. Am looking for ideas to run past my well guys.
Many thanks in advance...
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