Plumbing Triple Tank Set-up

[Cap'n]

Yeah, every time I played through the possible pump failure scenerios I always ended up with water on my imaginary floor. I think I'm going to have to give up on plumbing my two tanks together and simply have them share a common sump.

I did some research this afternoon into using U-tube siphons to connect them together but found more complaints than recommendations for that system. Still intriguing though...

Another possibility is cutting a small, square section at the top, back corner of each tank and building a channel to connect the two; return on one, overflow on the other. But, don't like the idea of cutting the tank...

Looks like I'm going with a shared sump. Essentially the same results anyhow.