<a href=showthread.php?s=&postid=9065033#post9065033 target=_blank>Originally posted</a> by ostrow
I re-read, mavgi.
The issue is not flexibility in my gate valve. I can turn it either direction multiple turns. Someone just says the gate valve in and of itself reduces the skimmer's efficiency. This is no bozo out there but I don't have permission to say who it is. I am curious as to the responses.
As I said, I'm going to reconfigure, with the valve on teh bottom and have the output above the water line. I think that should help.
And heck, maybe I'll try modding the ohter impeller. BTW I get only 11lpm on my Sedra 9000 with 4 layers of enkamat. I have the Dwyer meter that pulls on the little ball, so I connect the tube at the top and the ball rises, to just above the 10lpm. I was at about 7 with the needlewheel.
Mine is NOT recirc, and the pumps are in the original configuration.