Been reading about this set up and have a generalunderstanding of how/why the system works but don't recall seeing much as to pipe sizing. If I'm wanting 2000-2200gph I would need to use 2"pvc but snce this setup will also have a channeled standpipe would 1.5" be better? Not sure what percentage of water should be going in the channeled stand pipe. I get that things are fine tuned with the use of a valve but if 1.5" will work the smaller diameter may make a big difference regarding maintenance in a tight stand.