In article , Timothy Murphy
writes
Tim Mitchell wrote:

Or improvise a plunger with a wad of cloth in a bin bag. (or even use a
real toilet plunger).

I have tried a plunger -
seems more suited to a sink drain though,
as I don't think it seals on the loo.

Toilet plungers have a big flat rubber sheet about 8 inches diameter
--
Tim Mitchell