Zep Drain Bioclean & Odour Control 1L

Seems to have worked well. No more nasty smells and softened the nasty stuff that was in the plughole letting me scrub it clear and clean. I will definitely be buying this again. It's not a drain unblocked, it's a drain cleaner.

Did a fantastic job. No more smells.

It appears to work but I’ve only had one application.

Have tried everything on the market. I work away from home so my drains end up dried out. Used this once and left it on and have came back home for the first time in years without the smell of the drains hitting me when i open the door. Worth every penny.

Treated a two bowl kitchen sink, used as described and once all areas were treated including separate draining area, water drained away quickly and has remained so since application about two weeks ago. No strong aroma or messy residue left after use. Would buy again

Completely useless. Followed the indications to the letter but had zero effectiveness. It was just a waste of money

Good

An enzymic cleaner was recommended so I gave this a try to clean up an outside gully drain which had drain flies. I also used boiling water and a long handled scrubbing brush then used this cleaner afterwards. The drain certainly did get cleaner but what the effect this bioclean had is hard to quantify. I followed all the instructions and left it to work overnight and then scrubbed again the next day. This did nothing to remove the drain flies though. Worth noting that this is much gentler and easier to handle than caustic soda. Perhaps better suited to preventative maintenance cleaning rather than heavy duty single use.