Add to your order
- Coverage for accidental damage including drops, spills, and broken parts, as well as breakdowns (plans vary)
- 24/7 support when you need it.
- Quick, easy, and frustration-free claims.
- No Additional Cost: You pay nothing for repairs – parts, labor, and shipping included.
- Coverage: Plan starts on the date of purchase. Drops, spills and cracked screens due to normal use covered for portable products and power surges covered from day one. Malfunctions covered after the manufacturer's warranty.
- Easy Claims Process: File a claim anytime online or by phone. Most claims approved within minutes. We will send you an e-gift card for the purchase price of your covered product. In some instances, we will replace or repair it.
- Product Eligibility: Plan must be purchased with a product or within 30 days of the product purchase. Pre-existing conditions are not covered.
- Terms & Details: More information about this protection plan is available within the “Product guides and documents” section. Simply click “User Guide” for more info. Terms & Conditions will be available in Your Orders on Amazon. Asurion will also email your plan confirmation with Terms & Conditions to the address associated with your Amazon account within 24 hours of purchase.
- No Additional Cost: You pay nothing for repairs – parts, labor, and shipping included.
- Coverage: Plan starts on the date of purchase. Drops, spills and cracked screens due to normal use covered for portable products and power surges covered from day one. Malfunctions covered after the manufacturer's warranty.
- Easy Claims Process: File a claim anytime online or by phone. Most claims approved within minutes. We will send you an e-gift card for the purchase price of your covered product. In some instances, we will replace or repair it.
- Product Eligibility: Plan must be purchased with a product or within 30 days of the product purchase. Pre-existing conditions are not covered.
- Terms & Details: More information about this protection plan is available within the “Product guides and documents” section. Simply click “User Guide” for more info. Terms & Conditions will be available in Your Orders on Amazon. Asurion will also email your plan confirmation with Terms & Conditions to the address associated with your Amazon account within 24 hours of purchase.
- Buy a lot of stuff on Amazon? Tons of items eligible for coverage, from the latest tech like Laptops, Game Consoles, TVs, Phones, and Cameras to major appliances, sporting goods, tools, toys, personal care, furniture, and more (not eligible for commercial or business use items).
- Accidents Happen. That’s why for your portable products we cover accidental damage from handling such as drops, spills and cracked screens. We also cover electrical and mechanical malfunctions, power surges, and wear and tear.
- Past and Future Purchases covered. 30 days after you are enrolled, all eligible past purchases (up to 1 year prior to enrollment) and future eligible purchases made on Amazon will be covered by your plan as long as you are enrolled.
- Fast, easy claims. Frustration-Free claims, with most filed in minutes. We will fix it, replace it, or reimburse you with an Amazon e-gift card for the purchase price of your product (excluding tax). File at Asurion.com/amazon.
- No Hidden Fees. For just $16.99 a month + tax you’re covered for up to 5,000 in claims per 12-month period. *THIS PROGRAM IS MONTH-TO-MONTH AND WILL CONTINUE UNTIL CANCELED* Coverage for all products ends 30 days after the plan is canceled. Cancel any time.
Add to your order
- Coverage for accidental damage including drops, spills, and broken parts, as well as breakdowns (plans vary)
- 24/7 support when you need it.
- Quick, easy, and frustration-free claims.

Amazon Prime Free Trial
FREE Delivery is available to Prime members. To join, select "Try Amazon Prime and start saving today with FREE Delivery" below the Add to Cart button and confirm your Prime free trial.
Amazon Prime members enjoy:- Cardmembers earn 5% Back at Amazon.com with a Prime Credit Card.
- Unlimited FREE Prime delivery
- Streaming of thousands of movies and TV shows with limited ads on Prime Video.
- A Kindle book to borrow for free each month - with no due dates
- Listen to over 2 million songs and hundreds of playlists
Important: Your credit card will NOT be charged when you start your free trial or if you cancel during the trial period. If you're happy with Amazon Prime, do nothing. At the end of the free trial, your membership will automatically upgrade to a monthly membership.
Buy new:
$93.48$93.48 $93.48 per Count ($93.48$93.48 / Count)
Ships from: Amazon.com Sold by: Amazon.com
Save with Open Box – Like New
$78.60$78.60 $78.60 per Count ($78.60$78.60 / Count)
Ships from: Amazon Sold by: Amazon Resale
-
-
-
-
-
-
-
8 VIDEOS
-

Image Unavailable
Color:
-
-
-
- To view this video download Flash Player
Waterpik Aquarius Water Flosser Professional For Teeth, Gums, Braces, Dental Care, Electric Power With 10 Settings, 7 Tips For Multiple Users And Needs, ADA Accepted, White WP-660, Packaging May Vary
Learn more
Return this item for free
We offer easy, convenient returns with at least one free return option: no shipping charges. All returns must comply with our returns policy.
Learn more about free returns.- Go to your orders and start the return
- Select your preferred free shipping option
- Drop off and leave!
Learn more
Return this item for free
We offer easy, convenient returns with at least one free return option: no shipping charges. All returns must comply with our returns policy.
Learn more about free returns.- Go to your orders and start the return
- Select your preferred free shipping option
- Drop off and leave!
Bundles with this item
Purchase options and add-ons
Brand | Waterpik |
Power Source | Corded Electric |
Special Feature | Timer, Multiple Pressure Settings, Rotatable Tip, Multiple Operation Modes, Multiple Tips |
Product Benefits | Removes Plaque, ADA Accepted for Safety and Effectiveness, Gum Health |
Unit Count | 1 Count |
About this item
- ADVANCED WATER FLOSSING: Aquarius is a fully featured water flosser featuring enhanced pressure with 10 settings for a custom clean, massage mode for gum stimulation, plus a built-in timer/pacer pauses briefly at 30 secs and 1 min to track flossing time.
- EASY TO USE: Features a large reservoir for 90+ seconds of use, no refilling required. Small maneuverable flossing wand makes it easy to floss all areas including back teeth and includes a convenient water on/off switch.
- DENTIST RECOMMENDED: Waterpik is the #1 water flosser brand recommended by dental professionals and the first water flosser brand to earn the American Dental Association (ADA) Seal of Acceptance for safety and effectiveness.
- KEY FEATURES: 7 tips for multiple family members and needs, 10 safe and effective pressure settings, removable 22 oz reservoir (top-rack dishwasher safe for easy cleaning), 90+ secs floss time, 360 tip rotation, 120VAC/60Hz for use in North America only.
- PROVEN EFFECTIVE: Waterpik water flossers use PrecisionPulse technology to deliver a combination of water pressure and pulsations, removing up to 99.9 percent of plaque bacteria from treated areas that cause gingivitis, cavities, and bad breath.
- WARRANTY AND SUPPORT: Backed by a 3-year limited manufacturer’s warranty, see manual for details. Waterpik’s Colorado support team is available to help with any product questions or needs.
Frequently bought together

Frequently purchased items with fast delivery
From the brand

-
Not all water flossers are the same. Choose the Waterpik brand and take control of your oral health.
- #1 water flosser brand recommended by dental professionals*
- Accepted by the ADA for safety and effectiveness
- Backed by 80+ clinical studies
*Professional AAU, 400 dental professionals, October 2023
-
-
-
Shop Water Flossers
-
-
-
Shop Cordless Water Flossers
-
-
-
Shop Sonic-Fusion
-
-
-
Shop Complete Care
From the manufacturer

How to Water Floss in 3 Easy Steps
Fill reservoir with warm water
Fill reservoir with warm water and click a flossing tip into the handle.
Lean over sink
Lean over the sink and place flossing tip in mouth.
Turn unit on
Turn unit on, aim the tip along your gumline, and let water flow from your mouth into sink.
Smart Features - Aquarius Water Flosser
Optimal Control
- Customize your cleaning power with 10 settings ranging from extra low to extra high
- Floss Mode provides maximum plaque removal and Hydro-Pulse Massage Mode offers enhanced gum stimulation
- 1-minute timer pauses briefly at 30 seconds to help track your flossing time
High Volume Reservoir
- Removable reservoir holds 22 ounces for 90+ seconds of flossing time
- Add a splash of your favorite mouthwash for an even fresher clean
- Top-rack dishwasher safe - air drying recommended
Precision Flossing Wand
- Small, slim handle provides easy access to all areas
- 360-degree rotating tip reaches your whole mouth, even back teeth
- Easily stop and start water flow with convenient on/off switch
Compact Design
Height: 10.35 inches (with tip)
Width: 4.7 inches
Depth: 3.8 inches

The Aquarius water flosser comes with 7 tips for a variety of dental needs:
- 4 Precision (Classic) Tips (JT-100E)
- 1 Plaque Seeker Tip (PS-100E)
- 1 Orthodontic Tip (OD-100E)
- 1 Pik Pocket Tip (PP-100E)
(Additional genuine Waterpik brand flossing tips available separately)
![]()
Waterpik Sonic-Fusion 2.0 Professional Flossing Toothbrush
|
![]()
Waterpik Sensonic Complete Care Electric Toothbrush + Water Flosser
|
![]()
Waterpik Aquarius Water Flosser
|
![]()
Waterpik ION Professional Cordless Water Flosser
|
![]()
Waterpik Sidekick Water Flosser
|
![]()
Waterpik Nano Plus Water Flosser
|
|
---|---|---|---|---|---|---|
Customer Reviews |
4.5 out of 5 stars 17,883
|
4.5 out of 5 stars 407
|
4.6 out of 5 stars 145,395
|
4.2 out of 5 stars 6,287
|
4.4 out of 5 stars 1,581
|
4.4 out of 5 stars 6,998
|
Price | $144.12$144.12 | $199.99$199.99 | $93.48$93.48 | $69.99$69.99 | $99.99$99.99 | $59.99$59.99 |
Floss Settings | 10: Ranging from Extra Low to Extra High | 10: Ranging from Extra Low to Extra High | 10: Ranging from Extra Low to Extra High | 10: Ranging from Extra Low to Extra High | 5: Ranging from Low to High | ing from Low to High |
Removable Water Reservoir | Yes, 60+ seconds flossing time, hinged lid | Yes, 90+ seconds flossing time, hinged lid | Yes, 90+ seconds flossing time, hinged lid | Yes, 90+ seconds flossing time, hinged lid | Yes, 60+ seconds flossing time, inverts over unit | Yes, 60+ seconds flossing time, inverts over unit |
# of Tips/Brush Heads | 2 Flossing Brush Heads | 5 Tips, 2 Brush Heads | 7 Tips | 7 Tips | 1 Stylus Tip | 4 Tips |
Flossing Tips | 1 Compact Flossing Brush Head, 1 Full Size Flossing Brush Head | 2 Precision (Classic), 1 Orthodontic, 1 Plaque Seeker, 1 Implant Denture | 4 Precision (Classic), 1 Orthodontic, 1 Pik Pocket, 1 Plaque Seeker | 2 Precision (Classic), 1 Orthodontic, 1 Plaque Seeker, 1 Pik Pocket, 1 Tongue Cleaner, 1 Implant Denture | 1 Flossing Stylus | 2 Precision (Classic), 1 Orthodontic, 1 Plaque Seeker |
Electric Toothbrush Included | Yes, combined with water flosser | Yes, separate from water flosser | No | No | No | No |
Water On/Off on Handle | ✓ | ✓ | ✓ | ✓ | No | ✓ |
Rechargeable | Toothbrush only; water flossing uses electric power | Toothbrush only; water flossing uses electric power | No | ✓ | No | No |
Accessories | Toothbrush travel case | Toothbrush travel case | Tip storage case | Travel bag | no data | |
Voltage | Global | Global | North America Only | Global Voltage Compatible | Global | North America Only |
Dimensions with tip/brush head (inches) H x W x D | 10.88 x 5.25 x 6.0 | 10.50 x 5.25 x 5.5 | 10.35 x 4.70 x 3.8 | 7.56 x 6.2 x 6.13 | 4.84 x 5.70 x 5.5 | 8.50 x 5.0 x 4.5 |
Product Description
The Waterpik Aquarius water flosser features a compact, contemporary design and advanced water flossing technology for maximum performance. It comes with 7 flossing tips for a variety of dental needs and multiple users, a convenient one-minute timer with 30-second pacer to ensure thorough water flossing of all areas, and a removable water reservoir with 90+ seconds of flossing time. The special 360-degree rotating tip handle easily reaches your whole mouth, even back teeth. The Waterpik Aquarius water flosser removes up to 99.9% of plaque bacteria that causes gingivitis, cavities, and bad breath from treated areas and is clinically proven up to 2X as effective as string floss for removing bacterial plaque and improving gum health. Waterpik is the #1 water flosser brand recommended by dental professionals, and the Waterpik Aquarius water flosser is accepted by the American Dental Association (ADA) for safety and effectiveness. Backed by a 3-year manufacturer's limited warranty, see product manual for details.
Product details
- Is Discontinued By Manufacturer : No
- Product Dimensions : 3.8 x 4.7 x 10.3 inches; 1.46 Pounds
- Item model number : WP-660/660C
- Department : unisex-adult
- UPC : 056310179752
- Manufacturer : Water Pik, Inc.
- ASIN : B00HFQQ0VU
- Country of Origin : China
- Best Sellers Rank: #912 in Health & Household (See Top 100 in Health & Household)
- #5 in Power Dental Flossers
- Customer Reviews:
Videos
Videos for this product
3:52
Click to play video
2 Things you MUST know before buying!! Full Review
❇️ Chad Brown ❇️
Videos for this product
1:23
Click to play video
Watch Before Buying - Thoughts after 1 Year of Use
Life with Jamie 🌷
Videos for this product
0:50
Click to play video
Watch This Honest Review Before Buying
Karen's Honest Reviews
Videos for this product
0:52
Click to play video
Customer Review: Knice! *WATCH VIDEO FOR LIFE-HACK*
Raul Ramirez
Videos for this product
0:56
Click to play video
6 Months of Use *Update*...HONEST REVIEW
✅MikeyReviews✅
Important information
Safety Information
Do not direct water under the tongue, into the ear, nose or other delicate areas. Only use tips and accessories recommended by Water Pik, Inc. Use this product only as indicated in the instruction manual or as recommended by your dental professional.
Directions
1. Fill reservoir with warm water and click tip into handle 2. Lean over sink and place in mouth 3. Turn unit ON, aim the tip along gumline at a 90-degree angle, pausing briefly between teeth 4. Close lips enough to prevent splashing while allowing water to flow from your mouth into the sink 4. Floss inside and outside of upper and lower teeth 5. When finished, empty any remaining water from the reservoir NOTE: First-time users should start at lowest pressure setting and gradually increase over time.
Legal Disclaimer
no returns.
Looking for specific info?
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers find the oral irrigator effective and easy to use. They say it cleans their teeth and gums thoroughly. The tubing is easy to clean and gets into pockets that are hard to floss. Many customers consider it a good value for the money. They also appreciate the gum health and water quality. However, opinions differ on the size and noise level.
AI-generated from the text of customer reviews
Customers like the oral irrigator's effectiveness. They say it works well, has amazing results, and is powerful. The power cord is long enough to fit most counters, and the switch on the handle is a convenient feature. Overall, customers find it a great value for the money.
"...It really cleans well. I have plug in version and very powerful. Great value for the money." Read more
"...The on/off switch on the handle is a convenient feature. This unit comes with four "personal" color coded tips so the family can all use this...." Read more
"...But other than those two issues, my Ultra worked flawlessly, I never had to replace the hose or the handle as some owners had to, the on-off switch..." Read more
"...using it, and going from my annual checkup at the dentist, the results were amazing...." Read more
Customers like the cleaning ability of the oral irrigator. They say it cleans the spaces next to the gum line well, making their teeth feel cleaner than with traditional flossing. The variety of tips for different cleaning needs is appreciated. Customers find it easy to use and clean.
"...Easy to use, fits your hand, interchangeable piks. It really cleans well. I have plug in version and very powerful. Great value for the money." Read more
"...There are also 3 specialized tips for specific cleaning needs. These would need to be cleaned and sanitized after use to allow sharing...." Read more
"...noticed a difference immediately after using it as to how clean my teeth were and now it’s part of my daily routine...." Read more
"Purchased one year ago. Easy to use and clean. My wife and I use it every night...." Read more
Customers find the oral irrigator easy to use. They appreciate the bent tips that make it easy to direct the water carefully. The adjustable flow rate allows for precise pressure adjustment. The assembly process is simple, and turning it on and locking the attachment into the base is straightforward. Customers find it convenient and versatile for thorough water flossing. Some tips are provided to start with. Overall, customers are satisfied with the product's ease of use and consider it a worthwhile purchase.
"Excellent water pik. Easy to use, fits your hand, interchangeable piks. It really cleans well. I have plug in version and very powerful...." Read more
"...The adjustable flow rate allows easy setting to just the right pressure for your particular gum heath needs...." Read more
"Purchased one year ago. Easy to use and clean. My wife and I use it every night...." Read more
"...Again it was easy to use, and starting with a low pressure number, I quickly got used to the pulsating action and within a week was at the highest..." Read more
Customers appreciate the oral irrigator's value for money. They find it easy to use and say it works well for the cost.
"...I have plug in version and very powerful. Great value for the money." Read more
"...doing a lot of research I have found that Amazon gives the absolute best price for the WaterPik...." Read more
"...Learn from my mistake, this machine is worth every penny." Read more
"...flaw of the WP-100, its reservoir valve consist of a rubber piece, very cheap in my opinion, which eventually gives up and start leaking after a few..." Read more
Customers are satisfied with the gum health benefits of the oral irrigator. They mention it improves dental and gum health, enhances their dental care routine, and makes their teeth and gums feel like they just came from the dentist. The product also helps control bad breath and reduces gum buildup.
"...(See below.). But simply put, this is the best investment in dental hygiene I've ever made. Period. I'll never be without one again...." Read more
"...34;Removes bacteria and debris from hard to reach areas around dental restorations."..." Read more
"...My breath is noticeably fresher, and my overall dental health feels significantly improved—especially along the gumline, where flossing used to be..." Read more
"Just got home from cleaning. Hygienist said A+ on gums and teeth. I have had this waterpik for nearly 3 years now...." Read more
Customers like the water quality of the oral irrigator. They say it produces a steady, strong stream of water with a good tank size. The water flow and capacity are great, and there are multiple water strengths you can use as well as a massager. Customers find it efficient, versatile, and a thorough water flossing solution.
"Excellent water pik. Easy to use, fits your hand, interchangeable piks. It really cleans well. I have plug in version and very powerful...." Read more
"This is a great water flossing the container holds a lot of water so you can really use it a long time...." Read more
"...The small hand water controller unit on the hose allows me to turn the water flow off when I need to and MUCH more precise direction of water at the..." Read more
"...on/off toggle switch so that once you toggle it on, it keeps flowing without finger pressure, until you toggle it off;..." Read more
Customers have different views on the size of the oral irrigator. Some find it suitable, with a reservoir that's the right size to finish the job with one fill. The cord is long enough to fit most counters. Others mention it requires space in their bathroom and has a small container that holds the water, which was difficult to fill.
"Excellent water pik. Easy to use, fits your hand, interchangeable piks. It really cleans well. I have plug in version and very powerful...." Read more
"This is a great water flossing the container holds a lot of water so you can really use it a long time...." Read more
"...on portability because he hasn't had to transport it but it's rather large so I don't believe it would fit well in a suitcase." Read more
"...it, I simply keep the pick itself on the hose unit which fits easily on the hose-holster...." Read more
Customers have different views on the noise level of the oral irrigator. Some find it quieter than the original, with an easier water reservoir. Others say it's definitely noisy and could use some sound insulation. The water capacity is good.
"...There are only two minor "I wish this were different" issues. One, it's noisy. Not horrible, but still a bit loud...." Read more
"...Some say it’s too loud. I have found my new model a lot quieter than the one I just trashed after 10-12 years when used around 4 on the power dial...." Read more
"...as or more powerful than the WP-100 but it runs better, it sounds less stressed. Same or better results with less noise...." Read more
"Great product but very loud motor. Ten settings. Ok for 1 or a family of 5. It has multiple mouth pieces...." Read more
Reviews with images

Powerful and Adjustable, But a Bit Noisy
Top reviews from the United States
There was a problem filtering reviews. Please reload the page.
- Reviewed in the United States on March 5, 2025Color: WhiteVerified PurchaseExcellent water pik. Easy to use, fits your hand, interchangeable piks. It really cleans well. I have plug in version and very powerful. Great value for the money.
- Reviewed in the United States on January 30, 2025Color: BlueVerified PurchaseAs a long time fan of Water Pik, this unit is as good as expected. Ample size reservoir holds just enough water for a full cleaning. The adjustable flow rate allows easy setting to just the right pressure for your particular gum heath needs. The on/off switch on the handle is a convenient feature.
This unit comes with four "personal" color coded tips so the family can all use this. There are also 3 specialized tips for specific cleaning needs. These would need to be cleaned and sanitized after use to allow sharing.
One minor negative for me: the button to release the water tip is situated on the handle such that it is somewhat easy to inadvertently release the tip while flossing. This, of course, causes excess water spillage around the handle. One needs to learn how to grasp the handle so that this release is not triggered. I did not deduct for this issue, as I was able to (quickly) figure out what I was doing and how to prevent it.
5 STARS AND I DO RECOMMEND THIS ITEM
I write honest reviews based on real life experience with each item to help others make informed purchases. I read reviews too, and appreciate how helpful they can be. I hope that you find this review helpful!
- Reviewed in the United States on March 19, 2025Color: GrayVerified PurchaseThis is a great water flossing the container holds a lot of water so you can really use it a long time. Once you get used to how to hold it you can get all of your teeth without water going all over your sink. I definitely noticed a difference immediately after using it as to how clean my teeth were and now it’s part of my daily routine. Highly recommend for everybody and even my Dentist said this is the product to use.
- Reviewed in the United States on February 1, 2025Color: BlackVerified PurchasePurchased one year ago. Easy to use and clean. My wife and I use it every night. This is corded version as I could see no benefit in a cordless model.
NOTE: Recent problem. Machine turned off and both lights blinking orange, no water flowing. Nothing Philips suggested worked. Found an easy fix. I figured the problem was water flow. I removed the reservoir and checked the rubber gasket in the top of the pump housing by VERY gently probing it with the nozzle to make sure it was clean, no buildup, and no air bubbles. Then I checked the valve in the bottom of the reservoir to make sure it was clean and easily opening and not blocked.
Then I filled the reservoir with hot water, made sure the water was going through, and turned the pump on at the highest pressure setting. Using just the handheld wand without the nozzle, I turned it on and let the hot water run through until the reservoir was empty.
The flosser has been working fine ever since.
- Reviewed in the United States on February 10, 2015Color: WhiteVerified PurchaseLooking at the reviews, there seems to be a consistent effort by what I take are some owners of the venerable Waterpik WP-100 Ultra to trash this new model and portrait it as inferior to the WP-100. I don't think this is the case, the WP-660 is an improvement over the WP-100 in many ways and I'll tell you why later. The funny thing is that when I bought my WP-100 about six years ago, there were some reviews from what I take were owners of the revered WP-60 Classic trashing the WP-100. I take some people prefer the old to the new and that's OK. But I think some reviewers are being unfair to the Aquarius
I owned a WP-100 that lasted for little over six years, used almost every day by two people, those are a lot of days so the WP-100 is an outstanding product. I did have to replace the water reservoir once due to the cheap rubber valve mechanism -improved on the Aquarius as you will see- that failed after three years of use and started leaking. Also, the hook for the handle broke -also improved on the Aquarius- and it was very difficult if not impossible to hang the handle onto the Waterpik body, I had to makeshift a Velcro handle that looked terrible. Googleing around I was surprised to find that this is a common issue with the WP-100, some owners have replaced the entire unit just because of a broken handle as there is no spare part available from Waterpik. Boomer
But other than those two issues, my Ultra worked flawlessly, I never had to replace the hose or the handle as some owners had to, the on-off switch never failed and it worked the same way it was when new until an accident damaged the power-cord and it stopped working. Given its state with the handle hook and its age, I thought about self-repairing it but then I decided it was time for a new unit. At first and reading all those pro-WP-100 anti-WP-660 reviews I was tempted to get another WP-100, but the price of the Aquarius was about the same as the Ultra so I decided to give it a try
I'm glad I did. The first thing you notice with the Aquarius is its modern look and high quality materials, all white and clear, and gorgeous, a significant design improvement over the WP-100. It is also lighter, which some can argue is a good thing -like me- and some can argue it is a bad thing because it "feels" cheap, which is also a valid point. The important thing is that its weight doesn't compromise its operation in any way, it won't tip-off when used nor will slide or be unstable, it is just lighter. It might be due to the use of cheaper materials on the pump as some have argued here, or just lighter materials, an overall technological improvement rather than cheapening the unit off. I guess time will tell which one is more durable, or we will have to open both units and compare its guts to get a final answer. So, why is the Aquarius better than the WP-100, other than it looks?
-The WP-660 is less noisy and runs smother than the WP-100, you notice this right away. This with no compromise to the water pressure, the pressure is steady, as or more powerful than the WP-100 but it runs better, it sounds less stressed. Same or better results with less noise.
-The hook for the handle was replaced by a sturdier piece and a different design to hold the handle, which reduces the pressure on the piece. With the WP-100, it was very easy to push the handle all the way down the hook, either by accident or just because of its design, stressing the hook and eventually breaking it; there was nothing to stop the handle to slide all the way down. As said, mine broke. That was a poor design, fixed on the Aquarius; now you just put the handle on the holder, it cannot be pushed all the way down. Some have argued that makes it difficult to handle the hose, but I didn't find any issues, the hose juts hang there by simple gravity, it doesn't tangle or interfere with the unit in any way
-The reservoir valve was replaced by a metal spring mechanism. This was a another design flaw of the WP-100, its reservoir valve consist of a rubber piece, very cheap in my opinion, which eventually gives up and start leaking after a few years. As said before, the only way to fix it is by buying an entire new reservoir as the little rubber piece is not available alone, which means not only paying way more but also a waste of resources. In contrast, the WP-660 has a stainless steel spring with a plastic cap, that appears way more durable and also a much better and higher quality solution. Only time will tell but it seems it will last longer than the one in the WP-100
-The knob to graduate the pressure is easier to operate. The WP-100 has a hole to put both fingers in, on the Aquarius is a protruding knob, very easy to reach and to manipulate, way better I think, easier to find when in use if needed. And also more ergonomic
-The Aquarius handle has an on-off switch that actually works. The WP-100 has that dreadful push button on the handle that you need to press constantly to stop the flow of water, doesn't stop it completely and also causes the Waterpik to make a noise like the pump is being damaged while the pressure is reverted. Not good at all, it was a poor solution at best, a useless feature at worst, it just didn't work. On the WP-660, there is an actual on-off button; in fact the correct way to operate this new Waterpik is to turn it on the base first, then turn it on via the handle when you already have the tip inside your mouth ready to go, the water doesn't come out unless you turn the handle on. This is much better than having to reach the switch on the base unit with the tip in your mouth or having to hold into the appalling pressure cutting button on the handle and then release it. All this while water was still coming out of the tip as the button didn't cut the water flow completely.
-The pace timer. This feature is non-existent on the Ultra, and I realized it is very helpful. I use the Waterpik first on the upper section of the mouth, outside-inside and then move to the lower section, in-out and I'm done. At a pressure level of 8, the water in the reservoir, at full capacity, should last little less than 90 seconds. The Aquarius will give you a very short flow pause at 30 seconds of use and another at 60 seconds, this is good to pace your cleaning as it should take about 30 seconds to clean each part of the mouth, up and down, and then you have an extra 20 seconds to touch-up. This avoids you having to be periodically peaking over to the reservoir to see how much water is left and instead allow you to concentrate on the cleaning and doing the job properly
-The reservoir cover is now part of the unit. If you are like my mother in law that misplaces everything - sorry mom, I still love you-, chances are you have misplaced the reservoir cover of the WP-100 (as my mother in law did). This cover also contains the tips so it can be kind of an inconvenience to lose it. On the WP-660, the cover is attached with a hinge mechanism to the body of the Waterpik, no way to lose it. The tips are now stored on the unit itself, behind the reservoir
The rest is about the same as the WP-100, it comes with a bunch of tips from which you will probably only use the classic jet, and a 3 years warranty. It also includes a gum massaging mode which is pointless as you can achieve the same results by regulating the pressure knob. One disadvantage to the WP-100 is that you can only store two tips on the unit and not four, but again if you are like me that use only one, this is not an issue. But it might be for some users, if you have braces for example or like to regularly use the one designed for root canal maintenance (the Pik Pocket). One thing that was bad on the WP-100 and remain as bad on the WP-660 is cable management, there is no place to wrap the cable or at least a Velcro band included to deal with the cable, this lack of cable management is in part responsible for the damage to my WP-100 power cord, the cord is just hanging there. A needed improvement for the next design, please take note Waterpik
Overall, I see no disadvantages when compared with the WP-100 and instead see many advantages. Until the unit has more years in the market, speculating about its durability without real facts is pointless at this time, so far the Aquarius works the same or better than the Ultra so it's higher price is justifiable. And you can even get a good deal and get it at the same price or a little cheaper than the Ultra, which is a real bargain
Top reviews from other countries
-
EdgarReviewed in Mexico on February 19, 2025
5.0 out of 5 stars Limpia muy bien
Color: BlueVerified PurchaseYa tenemos más de un año con el aparato y sigue funcionando, lo recomendamos
- Let Me Say This:Reviewed in Canada on January 3, 2025
5.0 out of 5 stars Fantastic gadget for the whole family.
Color: BlueVerified PurchaseThe Waterpik Aquarius Water Flosser has been such a helpful addition to our family’s dental routine. With 10 pressure settings, everyone from my husband to the kids can find their perfect level - no more complaints about flossing being too hard or annoying!
I also love that it comes with seven different tips, so we can each have our own, and it works great for different needs. Whether it’s braces, sensitive gums, or just a good deep clean, this flosser handles it all. The tank is a good size and lasts long enough for a full session without needing a refill.
It’s not the quietest gadget in the world, but honestly, that’s a small price to pay for how clean my teeth feel after using it. It’s so much easier than regular floss, and it feels like a little mini spa treatment for your gums. Definitely worth it for the whole family!
-
Jean-YvesReviewed in France on November 2, 2021
2.0 out of 5 stars Mauvaise surprise.
Color: BlueVerified PurchasePrise américaine. Pas de prise européenne dans le colis.
En 120 volts.
- Dave in TorontoReviewed in Canada on March 22, 2023
5.0 out of 5 stars cleans better than your dentist is allowed to say....
Color: BlueVerified PurchaseI also have a travel size - much better for travel - but this is best for a leave it at home on a counter design
Instead of the typical travel models, if you need a water flosser for travel, I recommend the rechargeable Panasonic Ion model. It's a little larger than a handheld, but still very very compact, and much better performing. It is equivalent performance to this cheaper, bulkier Aquarius model that needs to be plugged in to use.
This Aquarius has plenty of power, lots of different tips - probably more than you will ever need
I have found the waterpik water flossers to be more durable than their Panasonic competition
We bought some water flossers after daughter got braces... now the whole family uses them
In the past when I would ask dentists if water flossers improve upon regular flossing or can be used instead of regular floss - they would always be uncomfortable, non-commital, and vague with their answers....
For everyone in our family, after using these for a while, when it came time for our regular dental cleaning, the dental hygienist (DH) remarked how exceptionally well maintained our teeth were with virtually no plaque
When I replied that we were now using water flossers the DH admitted that they are not allowed to say water flossers improve your dental hygiene..... I didn't press on why... but maybe it is a restriction imposed by their dental association?
That said - you have to use them properly. My daughter was using this with the tip designed for braces. She had great hygiene from the biting surface of her teeth to the braces, but the other half of her teeth, between the gums and braces had lots of plaque. The waterpik is not to blame, my daughter's sloppy hygiene was. She has now been told she has to focus on the entire surfaces of her teeth. No matter how good the tool, you still have to use it properly.
If you don't yet have a quality water flosser - get one! The countertop models are powerful enough, if you take care between your teeth to dislodge even stuck pieces of meat, and other things that tend to get caught between teeth. I used to check afterwards with regular floss - and found that handheld less powerful battery travel models, with smaller reservoirs, did less well with food particles wedged between teeth.
The other bonus here, is that like the advertising says, the DH confirmed it's also great for the health of your gums!
In short I now consider a quality water flosser, together with a good tongue scrape, as essential tools for the best possible daily dental hygiene at home.
If you want to splurge put a little mouthwash into the water in the flosser. Your mouth will feel every bit as clean as if you just came from the dentist !
-
Luis B.Reviewed in Mexico on September 13, 2024
5.0 out of 5 stars Simplemente genial
Color: BlueVerified PurchaseBuena capacidad de agua, buena selección de puntas, excelente control de presión, muy fácil de usar, las instrucciones son claras y funciona como debe de hacerlo, desde el primer uso noté la diferencia en mi higiene bucal.
Disclaimer: While we work to ensure that product information is correct, on occasion manufacturers may alter their ingredient lists. Actual product packaging and materials may contain more and/or different information than that shown on our Web site. We recommend that you do not solely rely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. For additional information about a product, please contact the manufacturer. Content on this site is for reference purposes and is not intended to substitute for advice given by a physician, pharmacist, or other licensed health-care professional. You should not use this information as self-diagnosis or for treating a health problem or disease. Contact your health-care provider immediately if you suspect that you have a medical problem. Information and statements regarding dietary supplements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease or health condition. Amazon.com assumes no liability for inaccuracies or misstatements about products.