On Sat, 31 Dec 2005 18:02:37 +0000, Nigel Molesworth wrote:

On 31 Dec 2005 04:34:14 -0800, wrote:

I have recently seen the sulphuric acid to clear blocked drains.

Just had a thought, are you sure it isn't blocked with the polystyrene
tiles that fell down? If so, pour down some diesel fuel. Make sure it
doesn't catch on fire, not with all those flammable tiles around.

diesel is useless, Use celluose thinners.

That will dissolve the plstic pipes as well, with luck :-)
Oh, sulphuric and hydrochloric make short work of congealed PLASTER and
cement waste..