Posted by MeAnthony on January 04, 2020 at 23:04:35 from (204.106.253.41):
I lowered air pressure in the tank; this decreased (but did not resolve) the significant pressure loss just before the pump kicked on. I replaced the switch and nipple, no improvement. It actually got worse to the point that the pump was short cycling, running about 5 seconds every 20 seconds. I put in a new pressure tank earlier this evening and the problem is basically resolved. There's still a small pressure drop (only a pound or two, not ten - 12 pounds like it was previously) just before the pump kicks on; I'll have to check it out again tomorrow and maybe raise the cut-in pressure a tad.
One thing I don't quite understand about the old tank.... I thought a failed bladder would give you water out the air fitting on top? I got a couple tiny droplets one time but that was all. Until the pump started short cycling so bad, I was sure the tank was good. This was a Goulds V80 tank, if that makes any difference in terms of design. Definitely very good longevity.
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