Hey Ramzfan
Just wondering, has this happened just recently? Has anything been changed to possibly cause this condition to appear? Or, did it just start happening? I'd have to agree with the other answers here in stating that it sure sounds like you've got a leaking toilet flush valve. Calcium deposits, a piece gasket/seal, dislodged seal, broken sealing surface (non rubber, possibly a plastic or metal sealing surface ), etc. Any one of them could be the culprit.
And, most RV systems can withstand at least a bit of somewhat higher water pressure than originally designed for. That doesn't mean you can pump 150 psi into the system and not experience parts flying into lunar orbit, but, anywhere from a 5 psi increase to say, a 15 psi increase from the "Norm" shouldn't have too much detrimental effect. I'm presently running our adjustable water pressure inlet regulator at 55 psi so the darn shower puts out some water for our showers. I'm not seeing any residual effects of the higher adjustment, yet!
And, since you don't mention any other "forced" leaks in any faucets etc., it sure seems to point at the flush valve on the toilet. I don't remember ever having one apart so, can't be of too much help in telling you what exactly to look for. Good luck, please post on what you find so others may learn. Thanks
Scott
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2004 ITASCA HORIZON 36GD, 2011 GMC Sierra 1500 4x4 Toad '08 GL 1800 Gold Wing
Retired-29.5 yrs, SDFD, Ham - KI6OND
Me, Karla and the Sophie character, (mini Schnauzer)
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