Andrew Gabriel wrote:
In article ,
Andy Dingley writes:
On 30 Mar, 10:20, "John" wrote:
I rent out a property and the toilet bowl is heavily limescaled
in the pan below the water line. What is the best product/solution to
remove it?
Go to Pattersons in Bristol, or your local wholesale supplier of
cleaning stuff to hotels etc. They have stuff far pokier than the
domestic retail grade.
Basically you want sulphamic acid to dissolve the scale.

Yep - I use Furnox DS-3 which is sulphamic acid with a colour
indicator added so you can tell when it's exhausted.
Used to be available from plumbers merchants in large tubs,
but few stock it now (although they will order it in).
I get it from BES.


That's what I use, but IME milder acid works just as well. Block the
bowl with some plastic bags and fill to the brim. Tip in a couple of
small packs of citric (50gms?) from the chemist and leave overnight.
No elbow grease required. Don't go to the pub that evening