I call my 911 "the 911" and the El Camino "the El Camino." Not real original but inarguably accurate. Sometimes I call the El Camino the Elky, mostly when typing.
As to my fun with plumbing fun yesterday:
I think I see the problem here.
My wife came in my home office and told me the toilet was running. 10 or so years ago we bought some nice toilets that will not ever clog. The toilet will flush about anything. The sewer line may plug but not the toilet. They are American Standard and we like them. The flush is almost an explosion in sound from the tank and poof, it's gone. The old toilets would clog with a single square of TP. OK, that is an exaggeration maybe two squares. It was low grade builder quality POS.
I lifted the tank lid and all looked fine. Then I wiggled the flush valve and it lifted up.
It had somehow snapped off at the base. You can see the broken plastic at the threads. I used my standard string of profanity and they made me feel better but did not help the situation. OK, simple fix. (Yea right)
Shut off the water and let the water drain from the tank. Hmmm, I said shut off the water! So I turned the valve a little harder. It still was letting water through. OK, grab the water meter tool and shut the water off at the street.
Drain the water from the house pipes and then remove the fill valve and remove the tank bolts. The rubber seals on the tank are just disintegrating so run to the store to get new tank bolts and seals. I had bought a replacement flush valve long ago because it is not a standard valve and I am glad I did. The store had nothing like it. Grab the bolts and seals and get home.
Replacement is the reversal of removal. No real issues. Only one trip to the store all is well (so far).