Jan,
Mark C showed me an easy solution. I have silicone hoses and all I have to do is loosen the clamps, put a big flat drain pan underneath and wiggle the hoses loose. They slide right off, no problem. It's also the best place to drain from as it's the lowest point on the car - lower than the rad. After draining I just slide the silicone hoses back on and retighten the clamps. Been doing this for years.
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