Plumb tanks together without a drain?

[JDJP]

So large tank in the middle of the room and another large tank on the side of the room both on a concrete slab. Any good safe way to constantly exchange a decent ammout of water between them overhead?

 

[theMeat]

From one tank to the other, or 2 tanks on same sump?

 

[JDJP]

From one tank to the other, or 2 tanks on same sump?

From one tank to another.

 

[mfinn]

If they are on the same level, you can pump water from one to another, but it's near impossible to use a second pump to return it and keep it balanced.
If one tank was lower than the other, you could put a pump in it to move the water to the higher one, which would have to have a drain to move the water to the lower one.

 

[theMeat]

What he said