I think you may have answered your own question by the fact that there is water leaking from a bottom hose.
ARE you sure that the water is not comming from a small rubber pipe that fits on to the expansion tank.
ALSO
Assuming that the water is not running down the block fro a higher point and appearing to come from the hose.
Iwould suggest that you take the car to another garage and get them to do some pressure checks on the cooling system. This should confirm if the leak is from a split hose.
Get the hose replaced and pressure check system again.
Maurice
January 2011
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