DIYbanter - View Single Post

wrote:
I have recently seen the sulphuric acid to clear blocked drains.
Having googled around, it seems I should not mix the 2.

Absolutely not!!!!!!!! A serious explosion could result, covering all &
sundry with nasty stuff.

I am trying
the caustic soda today followed by boiling water and detergent.

If that fails, how long should I wait before i move on to the acid?

If the drain doesn't unblock, try the caustic again or use rods. There will
still be a highly alkaline presense in the drain, so the acid will react
with it.

Dave