Zep Sulfuric Acid Drain Opener - 32 Ounce (Case of 12) ZUSADO32 - Professional Strength Drain Cleaner

Tried plenty other drain openers with no results. Poured ZAP in and next morning drain was unclogged. I did not pour it in the sink since it ruined it once before and I had to replace. This time, I undid the pluming underneath the sink and poured it there and worked like a charm.

This stuff is powerful & works really well. I have been using this for years & I highly recommend it.

Extra stong be careful

Well, when I got this stuff, I just went ahead and opened it up and poured it down the drain, and it got rid of the clog that had been there for some time.

This clears drains great, but there is a reason this is a 'professional' product. This is highly caustic and will react with metal, etc and etch it. It can also boil water in the pipes and forcefully eject acidic water from the drain. Be careful.

The packaging was very disappointing and probably very dangerous for the people transporting it from A to B. Almost all of the bottles were leaking to the point the inner cardboard had been saturated. This is a very powerful drain cleaner product, and the seller should have taken more steps to ensure that being banged around in transport didn't damage the internal packaging. It does work well as a drain cleaner, though.

Great for cleaning drain lines. It removes anything organic.

It dose a great job cleaning the drain. I still can,t find any thing to clean roots? I hand a four inch tree root in my main drain. It took a snake to clean it.