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I was wondering about that and had actually assumed that the weir
didn't
seal and wondered if that was a problem - my pond only freezes ~ 6"
deep so
maybe that doesn't matter?

The problem I foresee with this is that the neck portion could freeze
and crack. I hope to avoid that by running a pump thru the skimmer and
putting the return 2" under water level. I will hold the door down with
a flat rock or something- although I have been advised by others to
remove the door. I guess I'll see if this is successful or not. lol

I do not want to drain the pond below weir level- we get too many
freeze/thaw cycles in early spring with snow melting and saturating the
ground. I do not want my pond water level to be below ground water
level-too risky for liner bubbling. But if that is not a problem for
your pond you could drain the pond to below the weir.
Thanks for your input - It will be next year before I get it in - I had
hoped to get it in 2 wks ago, but it didn't get done, so will have to be
next year - I don't want to drain my pond down below weir level. - I am
going to check with Savio and the supplier and if they say it is okay
without draining down, I am not going to - if it cracks it will be their
problem. Other people in this area have the "Atlantic" skimmer and they
don't drain their ponds down for winter and I don't want to either
Gale :~)