Hi Renee, I missed your message until now, sorry. I ran the phosbans two different ways, they were both fine. I ran one off the back of the RSM mini-sump and the other instide my sump. Yes, the chiller is a good chiller (although expensive ~$400). It is a little loud, but it only comes on in the suummer on the really hot days. BTW, I see you are in San Ramone. I am in Orinda. If you want to talk via the phone for more detail, feel free to call: 415 595 7828 cell.