I disagree. The reason for the door/flap is to maintain a constant
spillway height adjusting to changing water levels. It causes the
water to move faster at the opening causing it to pull floating debris
in. If the spillway gets to shallow, debris can catch at and block
the opening. If the spillway gets to deep, the flow gets to slow and
doesn't draw the surface water.


"Paul in Redland" wrote in message ...
Forget the door thing if your skimmer will run 27/7, it won't be needed.

Paul