I have a 15A 220V breaker right next to the breaker for the pump, and it's labeled "Sweep." It doesn't appear to control anything that I can tell, but since it's 220V I'm assuming it is/was pool related. I was thinking maybe it was for a booster pump or something, but there's no plumbing on the pad to support it ... unless a 1-inch line could have been for that. There is a 1-inch line that is cut off at the concrete pad and I have no idea what it was for.