Plumbing sizes and drainage

[BlueTang<3]

I actually tried something different with my tank, matched the return pump to skimmer size and added more power heads.i had more sump to display flow on my 180 than my 360. So far and is not old enough to notice anything. But to answer the is the plumbing working its yes. I also only have 1 inch bulkheads for returns just bushing to 1.5 immediately and drains are 1.5 bushing to 2 inch and 2 inch standpipe. Talking with a plumber he said dont go less than 3 inch for drain. So I cheaper out and went 2 inch my gate for the herbie is only slightly opened. So I have lots left, dam plumbing and valves and what not was probably 600 bucks