AH - I might have it. An overflow box will be built around all holes. The center hole is for the Drain (what you list as inlet). I assume you'll pipe that up with maybe a durso standpipe on it.
The two outside holes are return lines that will be piped up and over the edge of the overflow box?
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150 gal Custom. Born 5/7/07. 50gal, 29gal, 20gal Sumps. 30gal Frag Tank. ETSS 800 Skimmer, Deltec APF600 Skimmer. PFO Solaris Lighting on Display and Frag Tank
My Tank Thread
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