Quote:
Originally Posted by ChuckG
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Yea, I've seen their web page. In my experience, the manual tells a "half truth". The outlet can be submerged, provided that the level in the sump never changes. This occurs if you use an ETSS sump, which has a bubble trap that acts as a level control for the sump. You also need to keep the sump at or slightly below the high water mark indicated on the sump, near the return outlets.
Failure to do this will cause the skimmer to work poorly. With the water level a bit high the skimmer will back up and flood or fill the collection container. Too low and the skimmer will not be effective.
I stand by my original post. The output ot the skimmer should be at or above the water level in the sump.
I solved the problem on my own system by building a small stand for my skimmer. It's about 12" high, which is actually too much. The output of the skimmer is then connected to the sump, at the normal location, by using an L and a T. The Tis at the level of the skimmer and has a "vent stack". The L is used at the level of the sump.