that shit piles up in the drain pipes like concrete youll have to cut out some wall to get to that shit. im seeing this more and more. the sink wouldnt drain probably why the tenant moved out scared to complain after he may have tried draino or someshit.
i dont know how they get away with selling this crap that is meant to clog not clean drains, they need to stop selling this shit.obama needs to lay the smack down on these companies
i took out all this wall still it doesnt drain at all maybe 2 percent drainage