Thanks, Mohawk for the explanation of 'swirl pluggin'

Another question for y'all....

I called the electricians and they wanted to know
1) if I had the timer already (It's cheaper if I get it)
2) what voltage is the pump


I mentioned earlier that I thought it was 220v but when I checked the pump itself (A Hayward Power-Flo LX) it says 115 v. That's not 220 OR 110. So which timer do I get? Is there some way to tell from the breaker box which is in the basement? Also when I checked them out at Lowes, they didn't have a corded model, only hard wire.

Thanks

CB