A fluid flow regulator has a body defining a tapered central passageway. A ferrous or magnetic ball is disposed within the central passageway and may be biased to a predetermined location within the passageway by a spring. An electromagnet is disposed at one end of the passageway. Varying electrical power to the electromagnet attracts or repels the ball thereby moving it to different locations within the tapered passageway to vary the flow through the passageway.