Waterpik Aquarius WP-660 - 10 Pressure Settings and 22-Ounce Tank

Waterpik Aquarius WP-660 is a countertop water flosser with 10 pressure settings, a 22-ounce reservoir, and a corded design for North American outlets. Its white US model uses a one-minute timer, a 30-second pacer, and a rotating handle for directing the water stream.

Core Features and Capacity

The WP-660 delivers 1,400 pulses per minute and a flow rate of 13 ounces per minute, according to Waterpik's US specifications. Its removable reservoir holds 22 ounces and provides 90 seconds of flossing time at the stated operating conditions.

The package includes seven flossing tips, including a classic jet tip, an orthodontic tip, a plaque seeker tip, a Pik Pocket tip, a toothbrush tip, and a tongue cleaner. The handle rotates 360 degrees, and an on-off control sits on the handle for water-flow control.

Power, Controls, and Warranty

The WP-660 is designed for 120VAC and 60Hz outlets and is specified for use in North America. The 52-inch electrical cord keeps the unit connected to a standard outlet, while the countertop format avoids battery charging.

Waterpik lists a $99.99 MSRP for the WP-660 and provides a three-year limited warranty. The Aquarius model has a 4.7-inch maximum base width, a 3.8-inch maximum base depth, and a 10.35-inch height with the tip or brush attached.

How It Compares

Waterpik's comparison data places the WP-660 beside the Aquarius Professional WP-670. Both models have 10 pressure settings, a 22-ounce flow capacity, and 1,400 pulses per minute, while the WP-670 carries a $109.99 retail price compared with $99.99 for the WP-660.

Compared with the Waterpik ION Professional WF-12CD020-1, the WP-660 has a larger 22-ounce capacity versus 20 ounces and a higher pulse rate of 1,400 versus 1,300. Both are countertop units with 10 pressure settings, but the WP-660 uses a corded North American power design.

Best Fit and Limits

The WP-660 fits users who want a countertop water flosser with multiple pressure levels, several specialized tips, and enough reservoir capacity for a 90-second cycle. Its seven-tip set also covers orthodontic, plaque-removal, tongue-cleaning, and toothbrush attachments.

The main constraint is the power format: the WP-660 requires a 120VAC, 60Hz North American outlet. Its countertop reservoir and cord also make it less travel-oriented than a cordless water flosser, while its 10.35-inch height requires clear vertical space near the sink.