Permanent split capacitor (PSC) pool and spa pump AC motors have a capacitor that decreases the amount of power consumed for a given load. These motors have a one-compartment design that eases installation and maintenance.

Capacitor-start/run pool and spa pump AC motors have a main winding and an auxiliary winding with both a start capacitor and a run capacitor for additional power during startup for higher torque and higher operating efficiency.

Three-phase pool and spa pump AC motors don't require starting capacitors, run capacitors, or centrifugal starting switches that can wear out and fail. They operate with a higher torque and greater efficiency than split-phase pool and spa pump motors of the same HP, rpm, and frame size.

Capacitor-start pool and spa pump AC motors use a capacitor to provide additional power during startup for higher starting torque. This higher torque allows these single-phase motors to move heavier loads at lower speeds, allowing them to be more efficient than split-phase motors.

Split-phase pool and spa pump AC motors power pumps that circulate water through swimming pool and spa filtration systems that help keep the water clean. They have a less powerful, smooth, and softer startup for use with pumps that must gradually come up to speed after startup.

ECM pool and spa pump AC motors come with an electronically-commutated motor (ECM) design that provides variable-speed and programming capabilities and energy savings not found on standard, single-speed pool and spa pump motors.