The Waterpik Aquarius (WP-660) is a mains-powered countertop water flosser with a 22-ounce reservoir, ten pressure settings from 10 to 100 PSI, a floss and a massage mode, and a 30-second pacer. Electric Teeth names it the best countertop water flosser available and praises its plaque removal, grippy pressure dial and rotating nozzle. Its reservations are the price, the seven included tips being more than most people will use, and noise of up to 72 decibels that it calls average rather than 'ultra quiet'.
Full review
Pressure dial, pacer and two modes
Electric Teeth's reviewer, Jon Love, describes ten pressure levels running from 10 PSI to 100 PSI, set with a textured dial on the base. He settles around level 7 himself and suggests newcomers start near level 3, with level 1 for mouths recovering from dental work. A button switches between the standard Floss mode and a Massage mode; he says he cannot tell whether massage does much that a lower floss setting does not.
A pacer briefly pauses the water at 30 seconds and again at one minute to mark a full session, and it can be deactivated. Water flow is started and stopped with a sliding switch on the handle, and the tip rotates through 360 degrees using a ridged collar, which the review finds easier to control than on other models, cordless ones in particular.
Reservoir and countertop footprint
The removable tank holds 651ml (22 ounces). In Electric Teeth's testing it drained in about 90 seconds at level 10 and lasted around 4 minutes 45 seconds at level 1, which the review puts at roughly two flossing sessions per fill.
The unit is taller than it is wide: Electric Teeth measures it at 11.4 inches high with a nozzle, 5.9 inches wide and 5.12 inches deep, and says a shelf needs at least 12 inches of clearance. It has no battery. The power cord is about 4.5 feet and the handle hose about 3.2 feet, and the review points buyers without a bathroom outlet to a cordless model instead.
Cleaning results and tips
Love writes that he has 'been impressed with the results the Aquarius has given', noting the debris left in the sink. The review adds two cautions: the guidelines it cites favour interdental brushes as the most effective interdental tool, and Waterpik's supporting studies are self-funded. It also notes that the American Dental Association and the Oral Health Foundation have both given Waterpik flossers their approval.
The box contains three Classic Jet tips plus one each of the Orthodontic, Plaque Seeker, Pik Pocket and Toothbrush tips. Electric Teeth likes that any user can start immediately but calls the bundle 'a bit wasteful', since most people will only use the jet tips.
Noise, price and warranty
Waterpik markets the Aquarius as ultra quiet; Electric Teeth measured up to 72 decibels depending on the pressure setting and calls that 'pretty average'.
The review gives the retail price as $99.99 and says about $80 is what buyers should expect to pay, with alternatives from other brands often half to two thirds of the price. It still concludes the Aquarius is worth it, citing Waterpik's support, the availability of replacement nozzles and the 3-year warranty.
Strengths
- +Ten pressure settings from 10 to 100 PSI on a textured dial that Electric Teeth found easy to adjust
- +22-ounce (651ml) removable reservoir gave Electric Teeth about 90 seconds at the highest setting and 4 minutes 45 seconds at the lowest
- +Pacer pauses the water at 30 and 60 seconds, and can be switched off
- +Seven tips included, covering braces, periodontal pockets and implants
- +3-year warranty, which Electric Teeth calls well above average
Watch-outs
- −Electric Teeth lists the price as a con, describing it as a premium option at a $99.99 retail price
- −Needs a power outlet: there is no battery, and the cord is about 4.5 feet long
- −Up to 72 decibels in use, which Electric Teeth considers average rather than the 'ultra quiet' Waterpik claims
- −More tips in the box than most users need, which Electric Teeth calls wasteful
How it compares
The Waterpik Aquarius must stay plugged in, where the Waterpik ION Professional Water Flosser (WF-12) runs from a rechargeable battery. Electric Teeth, which reviewed both, makes the Aquarius its first choice for a countertop flosser and found its ridged rotating nozzle easier to turn than the ION's; the Aquarius holds 22 ounces of water against the ION Professional's 20.
Rating sources
Counts as 4.72/5 in our score — this publisher's 7 scores on the site average 4.64, so its scores are adjusted down to compare fairly with other publishers.
Our 4.7 score is the average of the 1 scored review above, each adjusted for how strictly its publisher scores; 2 more reviewed it without printing a score and are not in the average. More about methodology.
