The Waterpik Aquarius (WP-660) and the Waterpik Ultra Professional (WP-662UK/WP-660UK) share the same fundamental technology: a high-capacity reservoir, 10 pressure settings, a 1-minute timer/pacer, and the clinically proven ability to remove up to 99.9% of plaque. They are functionally almost identical, differing mainly in retail packaging, accessories, and power compatibility.
Waterpik Countertop Flosser Comparison: Modern vs. Legacy
The key distinction is that the Aquarius and Ultra Professional models (the 600-series) are superior to the Ultra Plus (the 100-series) because they include vital guidance features like the timer and massage mode.
| Feature | Waterpik Aquarius (WP-660) | Waterpik Ultra Professional (WP-662UK) | Waterpik Ultra Plus (WP-150UK) |
| Model Type | US Flagship (Best All-Around Value) | UK Flagship (Locally configured) | Older/Mid-Tier (Legacy Model) |
| Regional Plug/Voltage | 120V (US/Canada only) | 230V (UK 2-Pin Shaver Plug) | 230V (UK 2-Pin Shaver Plug) |
| Massage Mode (Gum Stimulation) | Yes (Hydro-Pulse) | Yes (Hydro-Pulse) | No (Lacks this mode) |
| Timer/Pacer | Yes (1-min timer / 30-sec pacer) | Yes (1-min timer / 30-sec pacer) | No (Lacks this vital guidance) |
| LED Indicators (Function/Mode) | Yes | Yes | No |
| Water Control on Handle | On/Off Slider (Best for smooth pausing) | On/Off Slider (Best for smooth pausing) | Pause Button (Less intuitive than the slider) |
| Included Tips | 7 Tips (US Standard) | 5-7 Tips (Varies by UK retailer) | 6 Tips (Includes Toothbrush Tip) |
| Tip Storage | Handle slot for 2 tips | Handle slot for 2 tips | In-Lid Storage (Holds multiple tips securely) |
| UK Price (As listed) | N/A (Requires converter) | Often on sale for £59.99 – £89.99 | £114.00 (Currently overpriced) |
Key Takeaways for Buyers
- Best Features & Performance (The Winner): The Waterpik Ultra Professional (WP-662UK) is the superior choice for UK users because it includes the essential Timer/Pacer and Massage Mode, which the Ultra Plus lacks.
- Legacy Model Warning: The Waterpik Ultra Plus (WP-150UK), despite its higher current retail price of around £120.00, is the functionally inferior device due to the lack of the built-in timer and massage mode. Its main advantage is the dedicated tip storage case.
- Regional Restriction: The Aquarius (WP-660) is only suitable for North America (120V) and should not be purchased by UK users unless they plan to use a large, expensive voltage converter.
Key Differences Explained
The Waterpik Aquarius (WP-660) and Ultra Professional (WP-66xUK) differ primarily in voltage/plug, included accessories, and cosmetic accents.
1. Power and Regional Compatibility
The most critical difference is the power requirement:
- Aquarius (WP-660): Designed for North America (120V). It will not work safely or correctly in the UK without a robust voltage converter, as the required voltage is different, even with a simple plug adapter.
- Ultra Professional (WP-66xUK): Designed for the UK (230V) and comes with the necessary 2-pin UK bathroom plug for immediate and safe use in a UK shaver socket.2
2. Included Accessories
The specific model number can affect the included tips:
- The US Aquarius (WP-660) explicitly includes 7 tips.
- The UK-market Ultra Professional (WP-662UK) explicitly lists 5 tips, while other listings for the WP-660UK variant may list 7 tips. Always check the specific UK model you purchase, but the US version generally guarantees more tips included in the box.
3. Design and Cosmetics
- Aquarius (WP-660): Often referred to as having a slightly more compact footprint than older Waterpik models.
- Ultra Professional (WP-662UK): This model (often the black variant) typically features an LED Function Indicator and may have chrome accents for a more “professional” or aesthetic look, although the core functionality and performance remain the same as the WP-660.
4. Pricing and Value
- The US Aquarius (WP-660) is a superb value proposition at the current Black Friday Deal price of $49.99 (a 50% saving).
- The UK Ultra Professional (WP-662UK) is significantly more expensive at £81.99, even with a small discount. The final cost of importing the US model ($49.99 + $10.70 shipping) would still be cheaper than the current UK retail price.
FAQ
Q: Is Waterpik Aquarius the best? / Which WATERPIK water flosser is the best?
The Waterpik Aquarius (WP-660) is widely considered the best all-around value and feature set in the countertop category. It is an “Overall Pick” for many retailers because it includes the necessary features (10 pressure settings, timer/pacer, massage mode) while balancing performance and price. For those who travel or prioritize quiet operation, the Waterpik Cordless Slide is better, but for countertop use, the Aquarius is generally the top recommendation for its blend of features and reliability.
Q: What is the most powerful water flosser UK?
Both the Waterpik countertop models (like the Ultra Professional) and the Philips Sonicare Power Flossers offer 10 pressure settings/intensities, providing maximum power. In terms of efficacy, the Philips Sonicare Power Flosser line is unique due to its Quad Stream Technology, which aims to maximize cleaning performance and coverage rather than just focusing on raw water pressure.
Q: Which WATERPIK is best for gums?
While all Waterpik models are proven to improve gum health, the best option specifically for gums would be any model that includes the Hydro-Pulse Massage Mode (like the Aquarius and the Ultra Professional). This mode is designed to stimulate and improve circulation in the gum tissue, promoting stronger and healthier gums over time.
The Verdict: Which Water Flosser is Right for You?
- Choose the Waterpik Aquarius if: You need the widest variety of specialized tips, the largest water reservoir for a full 90-second flossing session, and prioritize a lower price point with the ADA Seal of Acceptance.
- Choose the Philips Sonicare Power Flosser 5000 if: You prioritize the cutting-edge Quad Stream technology for maximum surface coverage, need a quieter device, or are a frequent traveler requiring global voltage compatibility.
Water Flosser Wars: Waterpik Aquarius vs. Philips Sonicare Power Flosser 5000
This comparison pits the widely popular Waterpik Aquarius (WP-660) against Philips’ key competitor, the Sonicare Power Flosser 5000 (HX3811/20). While both brands deliver exceptional water flossing, they differ primarily in nozzle technology, power compatibility, and noise level.
| Feature | Waterpik Aquarius (WP-660) | Sonicare Power Flosser 5000 (HX3811/20) |
| Current US Deal Price | $49.99 (50% savings from $99.99) | $99.96 (Saved information) |
| Nozzle Technology | Standard Jet Tip (Single Stream) + Wide Tip Range | Quad Stream Technology (X-shaped water flow) |
| Pressure Settings | 10 Settings (Dial Control) | 10 Intensities (Dial Control) |
| Water Capacity | 22 oz / 651 ml (90+ seconds) | 550 ml (75 seconds) |
| Included Tips | 7 Tips (Wide range for specific dental needs) | 2 Tips (Quad Stream, Standard Jet) |
| Noise Level | Average/Moderate | Whisper Quiet Design (Significantly quieter) |
| Power Compatibility | 120VAC only (North America use only) | 100-240V (Global Use) (Adapter only needed) |
| ADA Acceptance | Yes (American Dental Association Seal) | No (Not explicitly listed, though Philips cites internal clinical data) |
Key Differences Explained
The Waterpik Aquarius and the Sonicare Power Flosser 5000 are functionally excellent, but they differ primarily in these three areas:
1. Nozzle Technology and Efficacy
The primary difference is the cleaning action.
- Sonicare 5000: Relies on its proprietary Quad Stream technology, which disperses the water into an X-shape. This is clinically proven by Philips to cover 9x the surface area of a single-stream tip, potentially improving gum health up to 180% more than traditional floss.
- Waterpik Aquarius: Uses a standard single jet stream but compensates by including a wide variety of 7 tips (Orthodontic, Plaque Seeker, Pik Pocket, etc.) to target specific dental issues or appliances.
2. Water Capacity and Refilling
The Waterpik Aquarius offers a slightly larger reservoir (651 ml vs. 550 ml) resulting in 90+ seconds of flossing time, compared to approximately 75 seconds for the Power Flosser 5000. This small difference can mean the difference between completing a full clean and needing a refill.
3. Power and Convenience
- Sonicare 5000: Is the clear winner for travel and international use. Its 100-240V global voltage means you only need a plug adapter, not a bulky voltage converter. It is also significantly quieter than the Aquarius.
- Waterpik Aquarius: Is strictly designed for North American 120V outlets, restricting its use abroad.
The Verdict: Which Water Flosser is Right for You?
The choice between these two excellent devices depends on whether you prioritize tip variety and tank size, or quiet operation and cutting-edge nozzle technology.
- Choose the Waterpik Aquarius if:
- You need the widest variety of specialized tips (e.g., for braces, implants, or periodontal pockets).
- You want the largest water reservoir for a full 90-second flossing session without refilling.
- You prioritize a lower price point and the ADA Seal of Acceptance.
- Choose the Philips Sonicare Power Flosser 5000 if:
- You prioritize the Quad Stream technology for maximum surface coverage and targeted plaque removal.
- You need a quieter device.
- You are a frequent traveler and need global voltage compatibility.
What to Look for in a Water Flosser: Essential Buying Guide
To help users determine the “best” model for their needs, here are the key features to prioritize:
- Pressure Range (Power): Look for a model with 10 pressure settings (available on all current Waterpik countertop models). This allows for low, gentle cleaning for sensitive gums and high pressure for thorough plaque removal.
- Capacity & Flossing Time: A reservoir of 22 oz / 650 ml is the standard for countertop models, providing 90+ seconds of uninterrupted flossing time. Cordless models (like the Waterpik Cordless Slide) are portable but require refilling mid-session.
- Specialized Modes: Features like the Hydro-Pulse Massage Mode (included on the Aquarius/Ultra Professional) are beneficial for stimulating and strengthening gums.
- Pacer/Timer: A built-in 1-minute timer with a 30-second pacer is crucial for ensuring the user cleans all four quadrants of the mouth equally.
- Tips: A wide variety of tips (like the Plaque Seeker, Orthodontic, and Pik Pocket tips) is essential for users with specific dental work (braces, implants, deep pockets).
- Voltage: If you travel or live in the UK, choose a model with Global Voltage or one specifically engineered for the local socket (like the WP-662UK with its UK plug).
The Ultimate Waterpik Buying Guide: Countertop vs. Cordless
1. Countertop vs. Cordless: Aquarius vs. ION vs. Cordless Advanced
The comparison is fundamentally between power/capacity (Countertop) and portability (Cordless).
| Feature | Waterpik Aquarius (WP-660) | Waterpik ION Professional (WF-11) | Waterpik Cordless Advanced (WP-560) |
| Type | Countertop (Corded 120V) | Compact Countertop (Cordless/Rechargeable) | Handheld (Cordless/Rechargeable) |
| Max Pressure (PSI) | 10-100 PSI (Highest Range) | 10-100 PSI (Countertop performance) | 45-75 PSI (Lower max pressure) |
| Pressure Settings | 10 Incremental Settings | 10 Incremental Settings | 3 Settings (Low, Medium, High) |
| Water Capacity | 22 oz (90+ seconds) | 22 oz (90+ seconds) | 7 oz (45 seconds) |
| Key Advantage | Max power, largest tank, ADA accepted. | 30% smaller footprint, cordless operation for high-power unit. | Portable, travel-friendly, can be used in the shower. |
| Flossing Experience | Best for home use where power and capacity are key. | Best for small countertops or bathrooms without accessible outlets. | Best for travel or small, shared spaces (requires refilling). |
Verdict: The Aquarius offers the best performance for home use, but the ION is the modern compromise, delivering countertop power and capacity in a smaller, cordless unit.
2. Aquarius (WP-660) vs. Ultra (WP-100) / Ultra Plus (WP-150)
The older Waterpik Ultra models are largely superseded by the Aquarius:
- Aquarius (WP-660): Includes the Massage Mode, Timer/Pacer, LED Indicators, and a better On/Off Slider on the handle for easier, less messy control. It is also slimmer and more compact.
- Ultra (WP-100/150): Often lacks the key user-friendly features of the Aquarius (Timer, Pacer, Massage Mode). Its main advantage is often the inclusion of a separate covered tip storage unit.
Verdict: The Aquarius is the superior model functionally. Only choose an Ultra/Ultra Plus if budget is the absolute priority or if you strongly prefer its dedicated tip storage design.
3. Aquarius (WP-660) vs. Aquarius Professional (WP-670)
These models are almost identical in performance and core features. The differences are purely cosmetic and pricing:
- Aquarius Professional (WP-670): Is often marketed as the “Designer” series. It includes chrome accents and is available in a wider range of colors (Black, Blue, Grey, Pink, etc.).
- Aquarius (WP-660): Is the base model, usually white, with no chrome accents, and a slightly lower RRP.
Verdict: Performance is the same. Choose the WP-660 for the best value, or the WP-670 if you want the design/color options.
The Complete Oral Care Routine: Electric Toothbrush vs. Water Flosser
The Electric Toothbrush and the Water Flosser serve fundamentally different, yet equally vital, roles in maintaining oral health. The best oral care routine involves using both to ensure comprehensive cleaning.
| Device | Electric Toothbrush (e.g., Oral-B iO9/Sonicare 9900) | Water Flosser (e.g., Waterpik Aquarius/Sonicare 5000) |
| Primary Function | Plaque Removal from Tooth Surfaces | Debris & Plaque Removal between Teeth and Gumline |
| Cleaning Mechanism | High-speed bristles (Oscillating/Vibrating) that scrub the tooth enamel. | Pulsating stream of water that flushes and massages between teeth and below the gumline. |
| Plaque Removal Efficacy | Excels at removing biofilm from the flat surfaces of the teeth and along the gumline. | Excels at removing food particles and loose plaque from hard-to-reach interdental spaces and periodontal pockets. |
| User Benefit | Superior cleaning power, built-in timer, pressure sensor to prevent damage. | Gentle on gums, ideal for braces/implants, reaches areas string floss cannot. |
| Verdict | Cannot be replaced. Essential for cleaning tooth surfaces. | Highly recommended supplement to replace or assist string flossing. |
Key Takeaways: Why You Need Both
- Water Flossers Cannot Replace Brushing: The primary job of a toothbrush is to mechanically scrub the surface of the tooth (enamel) to disrupt and remove the sticky biofilm (plaque). A stream of water cannot replicate this scrubbing action.
- Toothbrushes Cannot Replace Flossing: Even the most advanced electric toothbrush bristles cannot effectively reach and clean the tight contact points between teeth and deep into the gum pockets. This is the job of flossing.
- The Combination is Superior: Using a high-performance electric toothbrush (like the Oral-B iO or Sonicare 9900) alongside a water flosser (like the Waterpik Aquarius or Sonicare 5000) provides the most effective cleaning routine:
- Toothbrush: Cleans the 3 main surfaces of the tooth.
- Water Flosser: Cleans the 2 spaces between the teeth and below the gumline.
Summary: Choosing Your Ultimate Devices
- For Surface Cleaning (Toothbrush): Focus on features like AI tracking (Oral-B iO), pressure sensors, and multiple modes (both Oral-B and Sonicare flagship models).
- For Flossing (Water Flosser): Decide between:
- Maximum Specialized Tips & Value: Waterpik Aquarius
- Quiet Operation & Unique Coverage: Philips Sonicare Power Flosser 5000
- Portability: Waterpik ION or Cordless Advanced
Final Summary & Best Recommendation
Based on the features, user reviews, and pricing data:
- Best Overall Water Flosser (US): The Waterpik Aquarius (WP-660) is the top recommendation. It is ADA accepted, includes the massage mode, timer, and 7 tips, and often offers the best sale price.
- Best Overall Water Flosser (UK): The Waterpik Ultra Professional (WP-662UK) is the best choice, as it includes the crucial features (timer/pacer, massage mode) and is configured for safe UK use.
- Most Efficacious Cleaning: The Philips Sonicare Power Flosser line, with its Quad Stream technology, provides the most unique and highest-coverage cleaning action, making it the top choice for maximizing plaque removal.
