I am planning the plumbing for an AGA 180 and I realized that the plumbing
would be much simpler if I had two smaller sumps, one under each overflow.
The problem is equalizing water height between the sumps. I was thinking of
simply running some PVC pipe along the back of the cabinet between bulkheads
in the sump.

Has anyone tried this, and do you think 1" PVC would be adequate? Would
flex PVC or hose be better? If one pump failed there would be flow of about
300 GPH between the sumps.