Reddit mentions of Clog Buster

I disagree with the earlier posters. Soap (and soap scum) buildup is a real thing. Hair makes it worse, but still. I occasionally have to use a plunger to clear the pipes. When they get really bad a Clog Buster does the trick.

They do make what is called "clog-buster". ( http://www.amazon.com/gp/aw/d/B001AJ5RNA?pc_redir=1410002965&robot_redir=1 )

However most plumbers I know would never use anything like this. Use a snake and be sure you can get it. If there's something actually blocking the pipe, the pressure could cause multiple problems, if it's not fully clogged the pressure goes past the clog usually.

Cool, you're welcome. Whenever one does work on old cast iron there's a high probability of dislodging a bunch of shit when removing old threaded fittings, ect. My house's cast iron has literally a quarter inch of rust scale/slugde on the inside. Every time anything disturbs it, it seems to throw a clot so to speak.

If you can get the drainage rate to sustain some amount of water flow, I would highly recommend a caustic or acidic cleaner, not an enzymatic cleaner. There's nothing like good, old fashioned gnarly ass chemicals. IF you can make sure it drains before the plumber has to deal with it. Otherwise you're totally right to use the enzymatic cleaner if you think it might still be sitting there when the plumber might have to deal with it.

I had a pretty darn similar situation with my upstairs sink, and what we did there was slightly risky but very effective. I had a garden hose that could reach the bathroom and so what we did was we capped off the vent stack on the roof with duct tape, and shoved the garden hose in the drain fitting in the wall. I was holding this in with a gloved hand and hand pressure, so the actual applied pressure was only as hard as I could push (maybe 20psi?) but we just pushed that clog right through. Most satisfying sound I've ever heard when it went (ca-THUUUNK).

There's actually a much nicer looking tool for doing this type of pressure assisted unclogging. It's called a clog buster. I haven't used one but what you'd do is shove it down past the vent T (so that you didn't have to tape up the vent pipe like I did) and then when you turn on the water it inflates and seals itself against the pipe, so you can successfully apply the hose pressure to the clog downstream.

Now, I will totally not take resposibility if this friggin floods your house. If you have plain threaded cast iron pipes all the way through, I don't think the risk is super high. But if there are leaded joints, they could in theory push apart with pressure. That would not be fun. So use with caution.