Plumbing into the basement

[Chin_Lee]

I have the same set up with 24' of flex pvc. I use two 1.5" for drain and one 1" for pump return. for return pump i use a barracuda - gives enough good flow for my lps tank that I don't have any other pumps in my display tank.
for your drains, if you decide to do herbie method, make sure you put the gate valves upstairs about feet under your drain. Its easier to control than if you were to put the gate valve down at the sump.