Flexible drain hose wanted

In message , pamela writes

Google flexible electrical conduit. I think Speedfit do a 15mm version which might adapt with a jubilee clip.

I would not advise it. With only a dribble of water now and then and at near zero pressure a flat hose could easily block and condensate tray overflow indoors or activate the cut off switch that some have. You need a pipe rigid enough to stay open by itself and resist kinking on any bends.

Would silicone hose do? Thicker walled but available in many diameters.

Or there is this stuff, corrugated, 12 mm bore

I wouldn't consider flat hose, for the same reasons as above.

Bob raises a good point about drainage. Either the silicone rubber hose Tim mentioned or the corrugated one you mentioned seem a good solution.

Now that I have the right search terms from your suggestion, it turns out there's a corrugated hose especially for air con units although all the ones Amazon and EBay offer are from Hong Kong!

Stuff from Hong Kong is usually faster than the advertised time, but if it is urgent the place I listed has always been OK when I have used them.