I asked this question on my build thread but no response there. 1st floor 112 gallon tank. Tank is drilled for 3, 1 inch bulkheads. (actual hole size close to 1.5 but uses a 1 inch pipe). Sump will be in the basement. Total height difference between return pump and tank will be about 9 ft and a total of about 21ft of horizontal run. I plan on using the full siphon method. I bought 2 inch pipe to make the run from the tank to sump. Both returns and drains. Obviously using reducers to change from 2 inch to 1 inch at the bulkheads. Question is 2 inch overkill? In the event the full siphon clogs I want the emergency drain to be able to handle the return pump flow. Or in this case is bigger better?