Christian McArdle wrote:

You can buy it as brick acid, I believe, from DIY stores and
builders merchants.


I'm planning to get some brick acid and pour it into my toilet. What
concentration would you recommend?



Full strength, and leave it, slap the toilet lid down and put your
extractor in fill blast, or open a window. It will degrade rubber and
plastic seals and pipes so don't leave it more than overnoght, then
follow up with bleach to neutralise, wait, and do it again if necessary.


I've already tried emptying the trap and leaving it 24 hours with 2 litres
neat bleach filling the U-bend. It made it much cleaner, but there's still
loads of scale and general nastiness.


Neat bleach? Use neat caustic soda crystals :-) Turns turds into soap
and silt that does!




Christian.