Plunger damage to black tank/toilet
I posted this in the General Tech forum, but thought I'd post it here as well. Our is a 2016 XLR 29HFS.
Can using a plunger on an RV toilet cause major damage to the toilet and black tank? Long story short, SO used RV toilet for the first time, and I didn't think to tell him about adding water to the bowl before & after flush, and it clogged. We cleared it by sticking a piece of old hose down toilet, and it started flushing properly again. Next morning, it clogged again - possibly didn't get it all the day before. Tried a piece of hose down the toilet again, but didn't work that time.
SO found a plunger, used it, and it cleared the clog - but problems after. The toilet no longer held a bit of water in the bowl. I figured the "flapper" seal was damaged and didn't want gases coming back into the RV, so I went outside to dump. We had full hook up, but had kept the black tank valve closed and the gray tank valves open (planned to close them that morning before showering since we'd be unhooking in the evening, to let them fill up and use them as a flush after BT dump). When I went out to dump the BT after realizing the toilet wouldn't hold water, I saw that "water" was leaking around the black tank valve - more specifically by what looked like where the pipe came out of the BT into the dump pipes, and also along the gray spray foam insulation in the same general area.
How bad did we mess things up??? Could we have totally blown seals on the black tank?? Or maybe just fittings where it goes into the dump pipes? We've since read that plungers should never be used in an RV toilet unless the black tank valve is open - is this true? We're newbies to RVing, so any advice, suggestions, etc. are greatly welcomed!