Health & Beauty

Waterpik Aquarius Water Flosser WP-660

Name: Waterpik Aquarius Water Flosser WP-660
Rating: 7 (1 reviews)

Water Flossers

The Waterpik Aquarius WP-660 is the most clinically researched water flosser available, with 10 pressure settings from 10–100 PSI, 7 specialist tips including orthodontic and pocket flosser, and a 650ml reservoir for complete mouth coverage without refilling. Available on Amazon.ca (ASIN B01B2NGKJE) at around $99 CAD.

7/ 10

ClearPick Score

Mixed Reviews

Effectiveness

7.5

Ease of Use

7.5

Pressure Settings

7.5

Value

7.5

Reservoir Size

7.5

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Water Flossers

Waterpik Aquarius Water Flosser WP-660

~$99 CAD est. on Amazon.ca

View on Amazon.ca →Opens Amazon.ca · Affiliate link

✅ Ships to Canada

✅ Prime eligible (most orders)

✅ 30-day Amazon returns

✅ No extra cost to you

✅ What Works

Waterpik's water flosser technology is the most researched product in this guide — there are over 70 independent clinical studies on water flosser effectiveness versus string flossing, and the Aquarius WP-660 is specifically included in many of them. The consensus finding is that water flossing is 51% more effective than string floss for reducing gingivitis and 29% more effective at reducing plaque in clinical studies. For people who routinely skip string flossing because of the time and dexterity required, the Waterpik provides a meaningful upgrade in oral health outcomes.
10 pressure settings spanning 10–100 PSI is the widest range in the category at this price. The lowest setting (10 PSI) is gentle enough for post-surgical use and patients with extreme gum sensitivity; the highest (100 PSI) provides deep gumline cleaning for healthy gum users wanting maximum impact. This range serves every adult user from dental recovery to maintenance.
Seven included tips cover more use cases than any competitive unit at this price: standard flossing, plaque removal, gum pocket cleaning, orthodontic cleaning (braces), tongue cleaning, and toothbrush combination. Users with braces or implants specifically benefit from the orthodontic tip, which is not included with most competing water flossers.
The 650ml reservoir provides 90 seconds of water at the highest pressure setting — enough for a complete mouth cleaning with significant buffer. Portable water flossers typically hold 150–200ml for 30–45 seconds; the countertop WP-660's larger reservoir means you don't need to refill mid-session.

⚠️ Worth Knowing

This is a countertop unit — it needs a permanently placed spot near a power outlet in your bathroom. If your bathroom is small, lacks counter space, or doesn't have a convenient outlet, consider a cordless Waterpik model instead, which sacrifices some reservoir size and pressure range for portability and no counter footprint.
The initial use learning curve involves water escaping around the lips before users learn to lean over the sink with lips slightly open. Budget for a few splashed counters and clothes in the first week. Technique becomes second nature quickly, but new users should expect a brief messy adjustment period.
Water temperature matters. Warm water is more comfortable and slightly more effective at flushing debris than cold water. Running tap water to temperature before filling the reservoir takes 10 seconds but noticeably improves comfort.
The Aquarius WP-660 is not a replacement for brushing or as a substitute for professional cleanings — it's an adjunct that makes your between-cleaning hygiene measurably better. Many dentists recommend it specifically for patients with braces, bridges, implants, or early gum disease who have difficulty with string floss.

What Real Buyers Are Saying

What buyers love

“"My dentist has been recommending a Waterpik for 5 years. I finally got one. My 6-month cleaning was the best I've had in a decade. My hygienist noticed immediately."”
Source: Amazon reviewerCollected in an earlier pass; not linked to a source thread.

“"I have braces and the orthodontic tip is a game-changer. Flossing with braces is painful and time-consuming. This gets every bracket clean in 2 minutes."”
Source: RedditCollected in an earlier pass; not linked to a source thread.

“"I've had gum disease issues for years. My periodontist specifically prescribed daily Waterpik use at pocket setting 6. My pocket measurements have improved at every visit since."”
Source: Amazon reviewerCollected in an earlier pass; not linked to a source thread.

“"My whole family uses this. We've had one for 4 years. I've replaced the tips twice and done zero other maintenance. It just works."”
Source: Amazon reviewerCollected in an earlier pass; not linked to a source thread.

Common complaints

Messy learning curve…

The first week I soaked my shirt and the mirror every morning. Once you learn to lean over the sink and close your lips lightly around the tip, it's fine. Stick with it.

Source: Amazon reviewerCollected in an earlier pass; not linked to a source thread.

Takes up counter space…

My bathroom counter is already crowded. This unit is not small. I love it but I had to reorganize my entire counter to fit it.

Source: RedditCollected in an earlier pass; not linked to a source thread.

Hose doesn't stay coiled neatly…

The handle hose has a tendency to uncoil and get in the way. Not broken, just a minor annoyance that you work around.

Source: Amazon reviewerCollected in an earlier pass; not linked to a source thread.

High pressure can be startling…

I accidentally started on setting 9 the first time. Very startling. Start on 3 or 4 and work up. Don't let a new user start above 5.

Source: Amazon reviewerCollected in an earlier pass; not linked to a source thread.

ClearPick Verdict

**No verifiable owner mentions have been collected for this product yet — the score below is a spec-based provisional placeholder, not owner-backed.** The quotes shown further down come from an earlier data-collection pass and are not permalinked to a verifiable source thread. The Waterpik Aquarius WP-660 is the most clinically validated oral care device in this guide and one of the clearest value propositions in any product category — backed by 70+ independent clinical studies, FDA-cleared, and the device that dentists specifically recommend more than any other water flosser. At $99 CAD with 7 tips and 10 pressure settings, there's no competing countertop water flosser that matches the combination of clinical evidence, tip variety, and reservoir size. The counter footprint and messy first week are the only real compromises.

Electric Toothbrushes

Waterpik Aquarius Water Flosser WP-660

✅ What Works

⚠️ Worth Knowing

What Real Buyers Are Saying

What buyers love

Common complaints

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