Difference between agitator and impeller in washing machine

Agitator or not, how do you decide? 

If you’re thinking about buying a top load washer, chances are you’re also weighing a traditional top load model with an agitator vs a newer agitator-less model. In this blog, we’ll go over plusses and minuses to each type to help you decide. 

When reading, remember that a washing machine must allow soap to penetrate and clean the clothes by opening the fabric and creating friction among fabrics to wash away soils, stains and smells. Each format results in a different means to do so that affects cleanability, efficiency, water usage and more.

Agitator Washers

Agitator machines are what most people are used to. The washtub has a column in the center called an agitator. During the wash cycle, the agitator oscillates to create the fabric openings and frictions needed to clean the load. Most agitator designs also include strategically placed fins along the sides to aid in movement.

The agitator design is extremely effective at opening the clothes, creating friction and, as a result, providing a deep clean for a variety of soils. Additionally, most offer deep fill, soak and other options for a more customized and thorough cleaning.

Superior cleaning aside, many customers opt for an agitator top load washer because it’s what they’ve always known and they’re more comfortable with the expectations as a result.

Agitators provide multiple wash motions for a good clean, including:

  • Spraying action - Soaks clothes with water recirculated from the wash/rinse cycle.

  • Wash basket action -Rotates for a hard-hitting clean.

  • Agitator action -Rubs against clothes to help break down stains and loosen soils.

Wash Plate/Impeller

Despite superior cleaning capability, the agitator design described above has two downsides. First, it can be rougher on the clothing as items are pulled back and forth by the agitator during the cycle. Second, the ability to swish the clothes back and forth requires higher water levels that cover the clothing entirely. 

As a result, brands started experimenting with agitator-less models -- with little success at first. Early versions simply couldn’t provide the right action to clean without a full soak and often tangled garments during the wash cycle. 

But that’s all changed now. Contemporary models use a flat plate along the bottom of the wash tub with fins and water jets that open the clothes and create friction. You’ll often see this flat plate referred to as a wash plate or impeller.

Wash plate/impeller washing is more gentle than agitator washing because nothing is grabbing or pulling your clothes. It also allows for larger capacities as there is no agitator taking up space and restricting the movement of garments in the wash tub. Lastly, wash plate/impeller units use less water per load.

Impellers provide multiple wash motions, including:

  • Spraying action - Soaks clothes with water recirculated from the wash/rinse cycle.

  • Wash basket action - Rotates for a deep clean.

  • Impeller action - Uses low-profile cones, wheels, fins or discs that spin to gently rub clothes against each other.

Which is Best?

The answer to this question is based on you and your preferences. If you don’t want a hard working machine that is going to give the deepest clean possible without a lot of bells and whistles, an agitator model is likely best for you.

If you want to use less water and wash more delicate items, an agitator-less model is likely best for you.

It’s also important to remember that both types are optimized to clean best when properly loaded. So, whichever option you choose, make sure you evenly place laundry in the basket and do not overload.

Get the best of both worlds

You don’t have to choose between agitator and impeller washer, with the industry-first washer machines the 2 in 1 Removable Agitator by Whirlpool.

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Whirlpool 2-In-1 Top Load Washer with Removable Agitator

How to Shop

GE, LG, Maytag and Whirlpool make both agitator and wash plate/impeller models. Samsung will have an agitator model out soon, but are currently all non-agitator. 

Speed Queen is completely committed to the agitator category. Their 3-model lineup features all agitator top loader machines built with the same commitment to durability and reliability as Speed Queen’s commercial laundry products. 

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If you need further help narrowing down to a model, our experts are here to help via live chat, call, or at the showroom.

What is better agitator or impeller?

A washing machine with an impeller uses less motion and water than a washer with an agitator. Designed so laundry has more room to move, it drives clothes from the outer rim of the wash basket to the center, using a small amount of water to optimize the friction. This is what helps deliver a gentle, yet thorough clean.

Which is better agitator or impeller in a washing machine?

Washing machines with an impeller tend to wash your clothes better than with an agitator. That means that, generally speaking, front load washers or top load washers without an agitator will do a better job at getting rid of tough stains and dirt off your clothes.

What are the pros and cons of agitator vs impeller?

Agitator vs. Impeller Pros and Cons.

Is agitator and impeller same?

impellers? Washing machines with agitators use a central post that twists back and forth, rubbing against clothes to help break apart stains. In contrast, washing machines with impellers use a low-profile cone or disc that spins/rotates to rub clothes against each other to get them clean.

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