When it comes to advanced at-home oral hygiene, the Waterpik Aquarius WP-660 stands in a league of its own. Designed for those who demand a professional-level clean, this countertop water flosser combines superior technology, ergonomic precision, and clinically validated results. If you’re looking to enhance your gum health, reduce plaque, and enjoy a fresher mouth every day, the WP-660 offers an unmatched solution that delivers exactly that—and more.
Elegant, Space-Saving Design Built for Daily Use
The Waterpik Aquarius WP-660 features a vertical, compact form that fits comfortably on any bathroom counter without dominating the space. Its matte finish, available in colors like white, black, grey, and blue, adds a touch of style to your hygiene setup. Equipped with non-slip rubber feet, it remains stable during use. The build quality is solid, with durable materials used throughout the reservoir and base unit.
Its 651ml clear plastic tank is removable and easy to refill, while a hinged lid prevents contamination. The tank’s size is a key advantage—it allows for longer flossing sessions compared to cordless alternatives, reducing interruptions and saving time during your routine.
Pressure Control Tailored to You
One of the standout features of the WP-660 is its 10-pressure level dial, giving users a full spectrum from gentle (10 PSI) to intense (100 PSI) cleaning. Whether you’re recovering from dental work or simply need a powerful jet to remove stubborn debris, the intuitive pressure dial makes it easy to find your ideal setting.
The textured dial offers secure grip even with wet hands, and unlike many cordless models that provide only two or three settings, the Aquarius allows you to fine-tune water intensity to your exact comfort level.
Large Water Reservoir Means Less Refilling
With a 651ml (22 oz) tank, users can complete up to two full flossing sessions without needing to refill. On maximum pressure, the tank lasts approximately 90 seconds; on lower settings, it can stretch to nearly 5 minutes. This is ideal for households with multiple users or for individuals who prioritize efficiency. Refilling is fast and hygienic, and the tank’s large capacity ensures you spend more time cleaning and less time preparing.
Ergonomic Handle with Superior Control
The flosser handle includes a 360-degree rotating nozzle, allowing easy access to all areas of the mouth, including molars and behind orthodontic appliances. The sliding on/off switch is conveniently located and has a tactile, grippy texture for precise water flow control. This intuitive layout enables seamless operation—whether you’re adjusting your aim or pausing mid-session.
Two Flossing Modes: Daily Clean and Gum Massage
Users can switch between Floss Mode for standard cleaning and Hydro-Pulse Massage Mode to gently stimulate gums and improve circulation. The massage function is particularly beneficial for those with gingivitis or sensitivity, helping to maintain optimal gum health over time.
While some may find this feature secondary, many with periodontal concerns report noticeable comfort and relief when alternating between modes.
Includes 7 Specialized Nozzles for Every Need
Waterpik equips the Aquarius with seven different tips:
- 3 Classic Jet Tips (for general use)
- 1 Orthodontic Tip (braces, wires, and appliances)
- 1 Pik Pocket Tip (periodontal pockets and sensitive areas)
- 1 Plaque Seeker Tip (implants, bridges, crowns)
- 1 Toothbrush Tip (simultaneous brushing and flossing)
This range accommodates almost any dental scenario, ensuring that users receive targeted, effective cleaning tailored to their oral condition. The nozzles click into place securely and are easy to remove and clean.
Timed Pacer for Balanced Cleaning
To promote even flossing, the WP-660 includes a 30-second and 1-minute pacer. The brief pause in water flow acts as a guide, encouraging users to switch arches and finish sessions in around one minute. This built-in timer supports consistent oral hygiene and can be disabled if preferred.
Clinically Proven Results and Professional Endorsements
Numerous independent clinical studies support the Waterpik Aquarius’s ability to reduce plaque and bleeding more effectively than string floss. It is approved by both the American Dental Association (ADA) and the Oral Health Foundation, making it one of the few water flossers with multiple certifications for safety and efficacy.
Dentists often recommend the Aquarius for patients struggling with string floss or those with specific dental work like implants, crowns, or braces. Its ability to deliver high-powered cleaning without trauma to the gums makes it ideal for long-term maintenance of oral health.
Noise Level and Power Requirements
Operating at up to 72 decibels, the Aquarius WP-660 is relatively quiet for a device of its power. It must be plugged into a wall outlet via a fixed two-prong cord. This ensures continuous, uninterrupted power—perfect for households where portability is not the main priority.
The included hose extends approximately 3.2 feet, offering over 7 feet of combined reach between the power outlet and sink, ensuring flexible placement in most bathroom setups.
Comparing WP-660 vs. WP-670 (Designer Series)
Both models offer identical performance. However, the WP-670 includes:
- Chrome accents on buttons and controls
- A premium storage case for tips
- Expanded color options, including teal, orchid, and pink
While the WP-670 is slightly more expensive (by about $10), users seeking aesthetic upgrades or enhanced portability might find it worthwhile. However, for sheer value and identical function, the WP-660 remains the smarter purchase.
Warranty and Durability
Backed by a 3-year manufacturer warranty, the Waterpik Aquarius exceeds industry norms. The device is built to withstand daily use, with minimal reports of malfunction or design flaws. Replacement tips are widely available and affordable, averaging about $5 each.
Over a three-year span, the total cost of ownership—including replacement nozzles—sits around $95, which is competitive given its premium performance.
Environmental Considerations
Although the Aquarius excels in function, Waterpik lags in sustainability. The excessive number of nozzles included, lack of a recycling program, and the use of non-renewable plastics raise questions. While the product reduces dental intervention (and its associated environmental cost), Waterpik must do more to lower its ecological footprint.
Final Verdict
The Waterpik Aquarius WP-660 sets the standard for countertop water flossers. Its extensive pressure customization, large water tank, specialized tips, and clinical backing make it ideal for anyone serious about oral health. While it carries a premium price tag, the value it offers in performance, convenience, and long-term hygiene outcomes is unmatched.
Whether you suffer from gum disease, wear orthodontic appliances, or simply want a better flossing experience, the Aquarius WP-660 is an investment in your daily well-being—and one of the best you can make for your smile.
- ADVANCED WATER FLOSSING: Aquarius is a fully featured water flosser featuring enhanced pressure with 10 settings for a c…
- EASY TO USE: Features a large reservoir for 90+ seconds of use, no refilling required. Small maneuverable flossing wand …
- DENTIST RECOMMENDED: Waterpik is the #1 water flosser brand recommended by dental professionals and the first water flos…
Frequently Asked Questions
Is the Waterpik Aquarius WP-660 good for sensitive gums?
Yes. Begin with the lowest pressure setting or use the Massage Mode for gentle stimulation.
Can I use mouthwash in the tank?
Yes, though it’s recommended to dilute it with water to avoid damaging internal parts.
How often should tips be replaced?
Every 3–6 months, depending on usage and tip type.
Is the Waterpik WP-660 portable?
No. It must be plugged in and is better suited for fixed bathroom setups.
What’s the difference between the WP-660 and WP-670?
The WP-670 offers cosmetic enhancements and a tip case, but performs identically to the WP-660.