Emaux EPV Power Variable Speed Pump "EPV" SeriesAdvantages of Variable Speed vs Traditional Single Speed Emaux EPV Power Variable Speed Pump reduces the energy usage of your pool, spa, waterfalls, or fountains. The saving due to higher efficiency provides saving from over usage and lower equipment maintenance cost. Traditional single speed pump runs at maximum load continuously, inefficient and high running cost compared to the Emaux EPV range. Reducing speeds provides slower water circulation