I have a Pentair WhisperFlo 011773 WF-26 pump (manufactured 10/14/2011, don't know the install date). It has had the motor replaced at some point with a single speed US Motors EB854 1.5 HP 3450 rpm 60 Hz wired on 115 volt (only have 120 volt service to pump house). My pool is an in ground 40 x 15 ft rectangle, 4-5 ft deep.
I would like to upgrade to something variable speed in order to save electricity. Are there any variable speed motors that I can just swap out myself? If replacing the entire pump is necessary, are there any drop-in replacements to the WhisperFlo?
Thanks for the help.