Durso Question

[mark]

The height in the overflow chamber is also set by how high the the primary stub is. Can go from none (just the bulkhead) upwards. Advantage of running the water level in the chamber on the higher side is less waterfall noise into to chamber. The water will back up over the top of the primary a few inches but takes a little playing around, just dry fit the stub into the bulkhead (don't need to glue) so it's easy to remove to cut back if needed.

All standpipe can be straight. Don't know what you're planning on flowing but know my 2" drains with Dursos can easily handle 1000gph each and from the different calculators expect them to do 2000gph+ each.