rayandronda
New member
just purchased a used oceanic 75 rr with the old square style overflow. My question is I have the 1 inch hole draining into my sump located about 15 feet away in my basement ( tank is upstairs) The drain is creating a very loud vaccum sound and I can tell that it is sucking in air, Should I be using the 3/4 drain? My return is 1 inch. Thanks - Ray
