When compared to single-speed pumps, variable-speed ones are able to lessen electricity usage and bills. The bill reduction can vary between 50 to 80 per cent. Variable speed water pumps spin the motor at a lesser pace, which saves energy as well as time, and they are programmable as per the demand of the user. Pentair Whisperflo Pool Pumps can be a great fit for your needs, as they are the best in quality and are highly recommended by their users.