Silencing overflows and emergency overflow design

[Old Salt 64]

I have an unusual set up I have designed. My 220 is built into a wall and behind it is the main tank on top about 5 feet above floor level with corner overflows. Each of those empties into seperate sumps at each end just below the floor or the main tank. A 2 inch bulkhead with a strainer empties each sump into a large 100 gallon refugium below the main tank.

My concern was in the event one of the 2 inch strainers might become clogged and cause an overflow which would not be pretty so I added an additonal 1 inch bulkhead directly above the strainer exit several inches above and plan on plumbing it into the same line the lower one drains through that flows into the refugium.

For additional protection I am putting two additional emergency overflows in the refugium that will empty into the lower sump which will prevent a second potential overflow onto the floor. They will be mounted above the waterline but below the top of refugium.

Anyone see any issues with my design?

Thanks in advance

 

[Old Salt 64]

So without photos I'm confusing many people as I have 75 views and no responses?

 

[mcgyvr]

Well...Im not sure you provided sufficient information to really answer with any certainty..
You have a tank that drains into 2 sumps that drains into a refugium that drains into a lower sump?..Is that correct?

Typically a 3 pipe setup (bean animal drain) is all on needs in each drainable container to ensure its quiet and fairly failsafe..Replicate that and sleep soundly...

If a 2" bulkhead clogs do you expect a 1" to keep with the same flow?..why not a backup 2"?
Combining drains isnt the best idea either..What if the clog forms after the combined area?.