Hey fellas sorry for the confusion, on the back pane across the bottom I will be using those for the closed loop, there will be 5 across the bottom and 2 across the top, those will all be on a closed loop with the oceans motions 4 way, I think I may have to add another one in the closed loop setup as well... There will be a sea swirl in each corner powered by the return pump.... I only have temporary plumbing up now, so it's still to be decided what goes where.... I feel your pain on the check valves , as I've had many floods myself

there will only be a check valve on the seas swirls return line. However there will eventually be a 3" floor drain in the floor in case anything happens....

I have much more to post.... I appreciate all the comments and compliments. This system has been a dream for far to long... Glad to finally see it coming together! Thanks everyone!
I am glad to hear that. I read your profile and saw you had years of experience and my hope was that it was just not clear in your original post.
That said, many years back I had several closed loop pumps on my system. My electric bills were running me over $1100 a month which was mostly attributed to my tank. I decided to make some major changes to my system to save on power. That included swapping my pair of 400 watt halides and six 4' VHO bulbs to LED fixtures as well as some major pump upgrades. I had upwards of 6 pumps on my system which was out of control. My 1/2 HP chiller was also running 12 hours out of the day to keep my tank cool. I switched my return pump out for a Reeflo Hammerhead and kept only one of my closed loops and outfit that with a Dart. The other 4 pumps were ditched in favor of Tunze's that I control via my Apex. The end result, especially as a result of the Tunze's was much greater control over my flow and huge savings in electricity. My chiller in fact was no longer needed and my electric bill dropped to about $350 a month..
I bring this up because this may just give you some ideas. Personally, I am not a fan of having a bunch of closed loop pumps. I know you are also going to run some Ecotech pumps but I will plant a seed here and give you an idea for all those bulkheads you have on the back of your tank.
I had a similar situation when I opted to ditch my closed loop pumps. It left me with several vacant bulkhead which got me thinking.. I hated the look of power heads in the tank. Largely because of the wires so I came up with a creative idea to hide the wires and take advantage of the bulkheads and the remaining plumbing.
I made some custom PVC mounts and mounted the Tunze silent clamps to them. When I removed my closed loop pumps I cut the PVC lines on the back wall of the tank and rotated the remaining PVC upwards so the end of the lines were above the water level. My plan required me to desolder the little Tunze interface boxes from the wires so I could route the wires through the PVC and out the back of the tank. I then soldered the little boxes back onto the Tunze cables. This was 5 years ago and my Tunze's are still kicking butt. On the rare occasion that I need to clean them, I just pull them off their mounts, slide some of the cable through the PVC and soak them in a container with vinegar on top of the tank. Then rinse them and put them back in. This setup has been so effective for my flow and was probably one of the best things I have done for my tank in the last 20 years. With my Apex in control of the flow, I have so much control over the flow that I wish I would have done this sooner. I have several flow profiles that rotate throughout the day ranging from surges that create wave motions to flow that kicks up any detritus that may have settled. It's so much more effective than any closed loop one could dream up. The one and only closed loop I chose to keep was one that exits out through a manifold under my live rock and keeps detritus from settling under the rock. That was important to me and that is also where my UV filter is plumbed.
These pictures were taken about 5 years ago.. The pumps now look like part of the liverock as a result of all the coraline on them. I neglect them but Tunze's are damn near bullet proof and they just keep on taking a beating without skipping a beat. By the way, I did all these mods including the closed loop removal while the tank was full. I just used some PVC plugs to plug the bulkheads from inside the tank and barely loosened the bulkhead nuts enough to rotate the lines upwards after cutting them to length. So just because your tank is full, doesn't mean this can't be done safely if you chose to do this down the line.
Here are two of the Tunze's that had to be mounted on some PVC extensions so they would clear the live rock that is glued to my back wall. The closed loop lines on this part of the tank were hidden in opening in the live rock.
Here they are mounted to the back wall.
I even mounted one to lockline on my overflow.
This is how the lines come out the back of the tank through the orignal closed loop plumbing.
Here are a few pictures of those pumps taken somewhat recently.. They blend right in! LOL