zelie_dad
Always bring a towel
When you say both those are slightly submerged, I take it you mean the open end of the downward 90 that is submerged correct? Do you have any water (even the slightest trickle) flowing down your OC during normal operation? I have read that there should be a small trickle always but wanted to be sure.
I mean the end of the drain where it empties into the sump. In my overflow box, the main is nearly submerged, and the open channel is probably 80% submerged, but importantly the air hole isn't covered.
I don't believe it is a requirement that you have water flowing through the open channel, it's just to handle any excess water that the main can't. Although I do though have some water moving through my open channel, all the time.
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