Pond Boss Forums INTRO Questions & Observations Pump water uphill

220 is better than 110 because you can use smaller wire, which is cheaper. Total electric costs will be about the same, if not exactly the same (or close enough that you wouldn't notice).

You can do direct burial, but running the wire in PVC will give it an added layer of protection if you have to dig in that area at anytime in the future.

As to what size PVC, that will depend on how much water you need to move (both electric and water PVC).