HGKitchen Drain & Plug Unblocker, Natural Drain Unblocker, Heavy Duty Drain Cleaner, Kitchen Sink Unblocker & Kitchen Cleaner for Pipes, Septic Tank Safe - 1 Litre

This is what you need! Period.

Did not work for us needed something stronger but good product

Got rid of all the gunge and residue in pipework

I used to 'help' with clearing a major blockage in the very shallow pitch (almost horizontal) soil pipe between toilet and outside.Although I'm not convinced as to the effectiveness of clearing the blockage, having poured a whole bottle into the toilet and leaving for a couple of hours, the stuff that was cleared using a plunger didn't have any odour. 😁(I'd really only bought, 2 bottles, because it couldn't hurt to try and I needed to bump up the total order value to enable 'next day' delivery for the plunger which was the primary solution - https://www.amazon.co.uk/dp/B0BZRLM2NJ )

Quality product

Absolute rubbish!!!!

For our troublesome outside drain, I used a whole bottle and left it overnight having followed the instructions to pour in lukewarm water. It broke down the fat to something that could be washed away with copious amounts of water.I like that it is suitable for our private drainage and is less harmful than many of the quicker acting products.

Easy to use with clear instructions.Unfortunately, isn't much good at clearing up clogged up drain.Sink wasn't fully blocked, as water still used to drain out albeit slowly.Used this as per instructions and left it overnight.Following morning flushed it out, and no improvement.Thought it might need another attempt, so did the same again.Again the following morning, still no change.Finally unblocked the sink using (the good old method) a plunger.Product might be OK to keep the drain clear using it on a regular basis, but definitely not to unblock the sink.Shame, as a lot of time and effort has gone into the design of the product and bottle.