"Tom" wrote
| "Andrew L" wrote
| snipped but trickles
| out the end, back along the bottom and is absorbed by the wall. The
| plaster on that wall is blown. :-(
| Can I suggest as a temporary measure until the problem is cured,
| that you tie a little bit of thin string or strong cotton around the
| outlet of your overflow pipe so that the trickle is drawn down the
| string and clear of your wall.

Or, as it's probably a plastic pipe, form a little lip at the base of the
pipe using pliers and the heat from eg a cigarette lighter. Or push an elbow
fitting on to the end.

Owain