Roebic HD-CRY-DO-6 Crystal Heavy Duty Drain Opener, 0.9kg, White, Granular

works great second time buying this product

This stuff is amazing We've been fighting the drain issues with our house ever since we bought it last year. The previous owners did absolutely nothing to rectify the situation aside from simply not using one of the bathrooms. So we've dug up the lines, in a slab foundation it's real fun, we've snaked them out repeatedly, tried to flush, used so many chemicals, and finally we thought we was at a good spot but nope a month later the shower was backing up again, ugh. Our grandson recommend using these crystals and I thought well it's only a few bucks so okay. My gosh it's the best thing we've done so far. I've used them about 4 times now and my drains have never ran so freely. I'm totally amazed at this product and can't stop telling anyone who will listen how great it is. After years of sediment build up from well water with no filtering or softener system the pipes were screaming for help. These crystals answered that call and told the plumber to hold his beer.

When compared its price with similar products on market(7, 8 times more expensive), I thought it was able to solve my kitchen drain problem once and for all. But after multiple times use, things are getting worse and worse. Today I have to call in a plumber to fix the completely blocked drain. Very disappointed!!!

I had a severely clogged bathroom shower drain. I had to use a lot of this product but it finally unclogged the drain and saved me a plumber's bill

There's no single chemical that can clear all clogs in all types of pipes without corroding the pipes. I use this product periodically to keep my kitchen drain pipe clear, needed because this pipe has a long run and shallow pitch and thus is prone to have build up inside. When I use this regularly I've not had clogging issues, but when I got lazy or forgetful and let it go too long I've gotten clogs. This product does not work for me once the flow gets very slow, where it actually can clog the drain completely as mentioned by some other reviewers. And it doesn't work for me once the drain is completely stopped. It does work great for keeping it unclogged in the first place.