Summary#
The Waterpik Aquarius WP-660 is an ADA-accepted countertop water flosser that removes up to 99.9% of plaque with 10 pressure settings and 7 interchangeable tips. With a 22oz reservoir, built-in timer, and a 360-degree rotating handle, it's perfect for anyone with braces, implants, or sensitive gums who wants an easier, more effective clean than string floss.
At a Glance#
Product : Waterpik Aquarius Water Flosser WP-660
Brand : Waterpik
Best For : Brace-wearers, implant and crown owners, and anyone whose gums bleed with string floss
Form Factor : Corded countertop unit with 22oz removable reservoir
Buy Now : View on Amazon
Key Highlights:
- 10 pressure settings let you start gentle and build up as gums toughen
- Seven specialized tips handle braces, implants, pockets, and plaque
- 22oz reservoir gives 90+ seconds of uninterrupted flossing
- Built-in 1-minute timer with a 30-second pacer tracks coverage
- 360-degree rotating tip handle reaches back molars without contortion
Who Should Buy This#
The Aquarius WP-660 hits a sweet spot for people who find string floss painful, fiddly, or simply ineffective around dental work. It delivers ADA-accepted plaque removal, the widest tip selection in Waterpik's lineup, and a pressure range that competing flossers can't match, often for less than what a single dental cleaning costs.
Perfect for:
- Brace-wearers who can't thread floss under wires and need the orthodontic tip to clear food and plaque around brackets
- Implant and crown owners who want to protect expensive dental work without aggressive scraping
- People with sensitive or bleeding gums who need to start at low pressure and increase it gradually as gums heal
- Anyone who hates string floss and has quietly skipped it for years despite the dentist's warnings
Design & Build Quality#
The Aquarius takes a familiar countertop shape: a weighted base housing the pump and motor, topped by a 22oz reservoir that lifts off for filling and drops back onto the dishwasher-safe seat. The white finish is clean and unobtrusive next to a bathroom sink, and the footprint is roughly that of a coffee mug's saucer.
The handle is the standout. A pause button sits under your thumb so you can stop the water flow without reaching for the dial, and the tip rotates a full 360 degrees so you can angle it at upper molars and the back of your mouth without twisting your wrist. Tips click in and eject with a button, and the unit stores two of them in a covered compartment on top.
Key Features#
10 Pressure Settings From Gentle To Deep Clean#
The Aquarius offers 10 pressure levels spanning roughly 10 to 100 PSI, more granular control than the 3-to-5 settings on most budget flossers. The lowest setting is soft enough for inflamed, bleeding gums on day one, while the top end blasts away trapped debris around braces and bridges.
This range matters because gum tolerance changes. You can start at level 2 or 3 while your gums adjust, then climb to 7 or higher over a couple of weeks as bleeding subsides. The dial holds your last setting, so there's no resetting every session.
Seven Tips For Every Dental Need#
Where many flossers ship with a single jet tip, the WP-660 includes seven. Three classic jet tips cover everyday flossing, plus a Plaque Seeker for crowns and implants, an Orthodontic Tip for braces, a Pik Pocket for deep periodontal pockets, and a Toothbrush tip.
For households, this means multiple people can keep their own color-coded tips. For an individual with dental work, it means the right tool for each problem area, the orthodontic tip alone can cut brace-cleaning time dramatically compared to threading floss under every wire.
Built-In Timer And Pacer#
A 1-minute timer with a 30-second pacer briefly interrupts the flow to signal when you're halfway through and when a full minute is up. It's a small touch that solves a real problem: most people floss too quickly and miss entire quadrants.
Following the pacer, you spend roughly 15 seconds per quadrant and finish with even, full-mouth coverage. Over weeks, that consistency is what drives the measurable drop in gum bleeding.
Clinically Proven Plaque Removal#
Waterpik is the #1 water flosser brand recommended by dental professionals, and the Aquarius is ADA-accepted for safety and effectiveness. It removes up to 99.9% of plaque from treated areas and is clinically proven up to 2x as effective as string floss for improving gum health, rising to 3x as effective for people with braces.
In practice, that translates to less bleeding within two weeks for most users and noticeably cleaner-feeling gum lines, especially in spots a brush and string floss tend to skip. Check current availability: View on Amazon
Technical Specifications#
Pressure Range : 10 settings, approximately 10 to 100 PSI
Pulse Rate : 1,400 pulses per minute
Flow Rate : 13 ounces (384 ml) per minute
Reservoir Capacity : 22 ounces (90+ seconds of flossing)
Included Tips : 7 (3 Classic Jet, Plaque Seeker, Orthodontic, Pik Pocket, Toothbrush)
Timer : 1-minute timer with 30-second pacer
Tip Rotation : 360 degrees
Power : Corded, global voltage 100-240V (check plug type by region)
Dental Acceptance : ADA Accepted Seal
Warranty : 3-year limited manufacturer warranty
Color : White (also sold in black and other finishes)
Pros & Cons#
Pros:
- Removes up to 99.9% of plaque bacteria from treated areas
- 10 pressure settings adapt from sensitive gums to deep cleaning
- Seven tips cover braces, implants, periodontal pockets, and plaque
- 22oz reservoir delivers 90+ seconds of continuous flossing
- Built-in timer and 30-second pacer ensure full-mouth coverage
- ADA-accepted and clinically proven 2x as effective as string floss
- 360-degree rotating handle reaches back teeth without strain
Cons:
- Countertop footprint needs dedicated sink-side space
- Corded design ties it to an outlet and isn't travel-friendly
- Very thorough users may need to refill the reservoir mid-session
- Water can spray if you switch it on before the tip is in your mouth
Final Verdict#
Buy it. The Waterpik Aquarius WP-660 is the gold-standard countertop water flosser, pairing ADA-accepted, clinically proven plaque removal with the widest tip selection and the most granular pressure control in its class.
Our recommendation: If you have braces or implants, the included orthodontic and Plaque Seeker tips alone justify the purchase, start at a low pressure setting for the first week, then dial it up as your gums stop bleeding. Get it now: View on Amazon