I also finished the dry-fitting (and some pvc cementing) of my prop tank plumbing.
I left the manifold/return line out of the pic for clarity. But I just wanted to share my overflow/drain plumbing configuration w/ y'all.
So first water will flow thru my durso standpipe. which actually runs very quiet. I just assumed I would've needed to fiddle w/ the hole size at least, but it worked out great when I did a test-run w/ water.
Then down and under the tank
Swings to the left on its way to the sump/fuge - ball valve to shut off overflow if necessary and plenty of pvc unions for quick disconnects.
Then it curves away from door and makes a 90 degree turn into the sump/fuge (I'm planning on changing this to a 45 degree turn tho after I make another home depot trip)
Then some of the flow (a small amount) will go thru this first ball valve into the fuge section.
Then the rest of the flow (the majority of the flow) will go thru the second ball valve straight into the skimmer intake section.
And usually this last ball valve will be in the 'off' position, but when I need to do a water change, I'll simply turn the skimmer section ball valve to the 'off' position and open up this third ball valve to take out water from the overall 67+prop set-up via a bucket.
I'll take pics of the return/manifold plumbing tomorrow