Buyers are encouraged to be present when the inspection is completed. That is also when most inspectors are paid, by the buyer at the time of the inspection.
Every inspections I've ever attended, (I attend the all) plumbing is thoroughly verified by running all facets for many minutes. blocking the shower pan drain, and flushing everything that was flush-able.
At that time, everything was working. That is all the inspector can be held accountable for.
You will be the one paying to fix the toilet and fixing the drain.... more