75 gallon tank

I want to start by thanking melev (Marc) for a great plumbing article and the follow up comments as well for helping me plan and begin the plumbing on my tank (finally).

Marc's article can be found here: http://www.reefaddicts.com/content.p...o-it-correctly

Here's the tank and sump on the stand (yeah).


Here's most of the plumbing parts. Some of you will notice there's a single union ball valve in ...