Thank you Wakerider and Vpham97 for your messages. Yea pretty big bummer not being able to use the SCH 80 Bulkheads - they barely didn't fit. :eek2:
So I had to stick with the ABS bulkheads. But to make myself feel better I used the industrial o ring supplied with the SCH 80's. Good thing I paid $20 bucks per bulk head x4 to just use/salvage the o ring. The Herbies on each side I think will be ok. I simply have converted the stock return as an emergency drain on each side and the original stock dedicated 1 inch drain, I am using but just shortened on each side to follow the Herbie method. On each 1in shortened Herbie style drain I have a gate valve. On the previous entries above you will see that I custom made a return to go back over the top.
I think I will be ok - unless you think or have heard other wise on this design.
In regards to the canal, good eye. I didn't think I posted a picture that you could see that I lived on the water. Yes I was lucky and the water way is a unobstructed path to the gulf. (no bridges in the way so any size boat would be ok to full steam through.)
Unfortunatley I just recently sold my 32 Boston Whaler Outrage that I had in the lift behind my house. Obama Care looks to be pretty scary, so I have to prepare for the worst. I don't want to become a statistic. :facepalm:
Thanks again for looking out - please respond on your hypothesis of how I designed my "herbie".
Wow! Sorry to hear about the boat. She was a beauty!
I'm interested in the Shamrock 270 Mackinaw when I can afford it. Not as big as that beast you owned, but should get me out diving/spearing and to the middle-grounds.
I have a keen eye when it comes to all things saltwater related. :inlove:
Back on topic..
I really wanted to use the sch80 bulkheads too. Unfortunately most tank manufacturers don't drill for them.
As to the Herbie.. I now have a perfect picture in my mind of how you ran your plumbing. I am still not convinced this is the most ideal method.
Honestly, my Herbie drain is touchy enough as it is with just one gate valve to adjust. Things like algae building up on the drain standpipe, the filter sock clogging up causing the water to rise within the sock, and even fluctuations in voltage causing the main return pump to pump different volumes of water throughout the day all reek havoc on my drain system.
With two Herbie drains to adjust I'd imagine these issues would only be amplified.
If anything I'd take a look at the Bean Animal drain system.. I think the majority of reefcentral would agree it is the best system for your setup.
http://www.beananimal.com/projects/silent-and-fail-safe-aquarium-overflow-system.aspx
(I did not run it on my setup b/c I wanted to utilize the two holes in each corner for returns. This does not seem to be an issue for you since you are already running external returns.)
The bean requires you to dedicate 3 holes to the drain system. This would leave you with 1 hole to do with as you'd like.