The Waterpik Aquarius WP-662 does make some noise when you use it, so it's something people often wonder about. From what we've found, it's kind of a middle-of-the-road hum—not super quiet, but not annoyingly loud either. Think of it like other electric gadgets you might have in the bathroom.
The noise is mostly from the motor and pump working hard to give you those water pulses, which help with things like plaque removal and gum health. Generally, folks don't find the sound too bothersome, especially considering what the device can do. Most people get used to it over time.
If you’re extra sensitive to noise or plan to use it when others might be sleeping, that's worth keeping in mind. You might try using it in a more soundproof bathroom, or just close the door to keep the noise from spreading.
In the end, while some noise is there, it doesn’t seem to stop most people from enjoying the benefits of the WP-662. If noise is a major concern for you, you might want to check out other models that are designed to be quieter, though they might not have the same power or features.
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How we researched this
Where this comes from: this answer draws on the product's published specifications and the reviews ShopSavvy collected for it, alongside prices from 1 retailer in ShopSavvy's price data, most recently seen Jun 11, 2026.
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