Help with setting up sump

[Jason McK]

A few thing you should keep in mind.

You will at some point want to take it appart. Use "Unions" in logical spots so that you can remove sections of the plumbing.
If your sump will be located right below the overflow, there is little need for Spa Flex. Save your move and just do it with regular PVC. Or upgrade from Sch 40 to sch 200. it is thiner walled high pressure.

You will want to put a ball valve just after your pump to regulate the amount of water returning to the tank.
Do a search for Derso stand pipe. That will be a great addition to the overflow as it will quite down the water drain sounds.

J