[cva66snipe]

Yea commercial use it's called Sulfuric acid or some trade name with a warning label stating it is such. Like I said it's for single floor use. But I don't recommend it except as a last resort. The problem is when you put it into a multi story building the stench goes up the plumbing vent pipe stinking up every floor as it goes.

Most places use a low PH chemical agent now to eat through clogs especially in health care facilities where fumes can be an issue. Really though if you wanna get the job done fast just use a 5 gallon shop vac instead. No joke it works better and quicker than any plumbers friend and most chemicals.

[steamroller]

a shop vac?never thought of it-thanks