Rank #6 in Best Water Flosser 2026: 10 Ranked, and Why the Cheapest Wins
Waterpik Cordless Advanced Water Flosser, Black
Price and rating as shown on Amazon when we collected them. Both change.
The Waterpik Cordless Advanced is a battery-powered cordless water flosser in black, sold as model WP-582UK, and at £69.99 it is the most expensive entry in this guide. It sits at number 6. The listing carries 6,194 ratings at 4.2 — the smallest rating count and the lowest score in the top 10, next to the two cheapest models in the guide, which hold 4.3 on 47,762 and 29,039 ratings respectively.
The detail that stands out on this page is what the listing does not state. No tank or reservoir volume appears anywhere in the specifications or the bullet points for this model; the only hardware numbers given are three pressure settings, a USB charger and a 580g weight. The cheaper Waterpik Pulse at £35.99 does quote a 450ml reservoir, the largest figure in the guide, though that same listing says it gives 'up to 45 seconds of flossing time'. What the Cordless Advanced does claim is stronger: 50% more effective than traditional dental floss, up to 99.9% of plaque removed from treated areas with a 3-second application, and 3X as effective as dental floss around braces with the Orthodontic Tip. Everything on this page comes from the Amazon listing as it is written, not from any testing we carried out.
How those 6,194 ratings break down
An average hides its own shape. This is the spread behind the 4.2 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £69.99 |
|---|---|
| Rating | 4.2 out of 5, from 6,194 ratings |
| Rating breakdown | Bands total 100: 62 at five stars against 9 at one star (as listed) |
| Tank volume | Not stated anywhere in the listing (as listed) |
| Pressure settings | 3 |
| Charging | USB charger |
| Power source | Battery powered, 1 Lithium Ion battery included |
| Best Sellers Rank | 6 in Power Flossers & Irrigators |
What buyers actually say
Quoted from customer reviews on Amazon
Verified purchase“This is amazing not the cheapest but quality so happy as I cannot use floss goes through me”
Verified purchase“Recommended by my brace technician, during treatment. Great to clean between brackets, keeping teeth well maintained. Good price and prompt despatch.”
What it is up against
The rivals it was ranked against in Best Water Flosser 2026: 10 Ranked, and Why the Cheapest Wins.
Questions people ask
How many ratings does the Waterpik Cordless Advanced have?
6,194 ratings at 4.2 out of 5, as shown on the listing.
Does the listing say how much water the tank holds?
No. The specifications and bullet points for the WP-582UK give three pressure settings and a USB charger, but no tank or reservoir volume.
How many pressure settings does it have?
Three, as listed in the product description.
What does Waterpik claim about plaque removal?
The listing states the Waterpik Cordless Advanced removes up to 99.9% of plaque from treated areas with a 3-second application, and that it is 50% more effective than traditional dental floss.
Can it be used with braces?
The listing says it is 3X as effective as dental floss for cleaning around braces with the Orthodontic Tip, and describes it as safe for braces, implants, crowns, bridges and periodontal pockets.
How is it powered?
Battery powered, with 1 Lithium Ion battery required and included, charged by USB.
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