I know I'm late to the table here, but thanks for posting this, very useful.
If I locate the unit in my basement how does it prevent a siphon from happening? That's my biggest concern.
ok so there's no way I can use the renew part of the system since my sump is below my tank on the first floor.
Won't work for me, my tank only has 4-5 inches behind it and I would have to drill holes through my hardwood floors. Even if i did, I would need pumps that could pump the water from my basement.Put both above the sump. That's how I had mine