Meh - it only takes 5-10 psi to clear a clogged toilet. Any more than that
and you risk blowing out the wax seal, and even 5psi can damage an iffy
seal. You do NOT want a sewer pipe blowing! In my case, it would drain into
my basement (ewwww)....


That could hurt.

I've heard of some folks using a 3,000 PSI pressure washer
to clear a clogged toilet. Didn't open the drain any, but
the toilet was immediately clear of TP and other solids.