Update:
The toilet has an attached hose and a small hand-held sprayer. With nothing else on, the sprayer produces no water. But when I hold down the toilet flush pedal, the handheld releases a full-strength spray, and the toilet continues its poor flow. When I release the toilet flush pedal, the handheld stops, and the poor toilet flow continues.
Not a solution, but interesting. Seems to show that the water pressure to the toilet is ok.
Suggestions have included checking filters and water valves, but:
- I can't imagine two completely separate filters becoming clogged overnight. Not gradually, but suddenly.
- If valves had gotten turned, wouldn't I seem some leakage/draining of some type under the coach? Nothing.
Thanks.