Wet dry vacuum cleaner motors come in different types, each with unique features and benefits suited to various cleaning tasks. The most common types include single-stage motors, two-stage motors, and bypass motors.

Single-stage motors are typically found in smaller, more compact wet dry vacuums. These motors are designed to provide sufficient suction for light-duty tasks such as cleaning small spills, dust, and debris. They are usually more affordable and efficient for everyday use, though they may lack the power needed for larger, more demanding cleaning tasks.

Two-stage motors, on the other hand, offer greater suction power and are used in more heavy-duty wet dry vacuum cleaners. These motors are often used in commercial and industrial applications where powerful suction is needed to handle large volumes of liquid or heavy debris. The two-stage motor provides better airflow and higher vacuum performance, which increases the overall efficiency of the vacuum cleaner.

Bypass motors are commonly used in wet dry vacuum cleaners because they are more durable and capable of handling wet materials without damaging the internal components. These motors feature a design where the airflow passes through the motor housing without coming into contact with the motor's electrical components, preventing water damage. This makes them ideal for applications where liquids and solids are regularly cleaned.