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Unread 04/07/2010, 11:19 AM   #3
uncleof6
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Join Date: Jul 2004
Location: AWOL
Posts: 12,013
It is nothing but a high priced "durso" modified standpipe. You can make your own for a bunch less, and yes it is an air/water mix standpipe system-- subject to the same flow restrictions (for trouble free operation) as one that is made from easily obtained pvc fittings.

Air/water mix systems are very touchy with restrictions in the lines, and geometry of the drain line. Angles, turns, 90's, valves etc., all cause turbulence in the lines, causing the air and water to mix, rather than remain separated. It is less problematic to feed other equipment or areas in the sump from the return line, rather than the drain line, and keep the drain line as straight and unrestricted as possible. I.E. no valves, no 90's, splits what have you. Valves are used in siphon drain lines, to set the water level in the over flow.

Jim


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Current Tank Info: 325 6' wide Reef
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