Waterpik Cordless Pulse 3100 WF-20 Rechargeable Water Flosser

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Product guide

Waterpik Cordless Pulse 3100 WF-20 Rechargeable Water Flosser

WF-20: Waterpik Cordless Pulse 3100 is a compact rechargeable water flosser with two pressure settings and a 6 oz removable reservoir. Its cordless format and listed shower suitability support travel and smaller bathrooms, while the small tank may require refilling during longer sessions.

At a glance

Two pressure settings (low/high)
Removable 6 oz reservoir, listing claims up to 45 seconds of continuous flossing per fill
Rechargeable lithium-ion battery with USB-C charging
Listing describes it as waterproof for shower use
Includes Precision and Tongue Cleaner tips

Price

$29.99Save 40%

Reference price: ~~$49.99~~

Price checked: Nov 10, 2026

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Often bought together

Replacement Heads for Waterpik, Replacement Tips for Waterpik Water Flosser | 6 Classic Jet Tips, Replacement Picks for Water Pik Water Flosser

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Pros and cons

Pros

Portable cordless format suited to travel and smaller bathrooms.
Two pressure settings provide a choice between low and high.
The listing claims up to 45 seconds per reservoir fill and up to 9 weeks per charge.

Cons

The 6 oz reservoir and up to 45 seconds per fill may mean refilling during longer flossing sessions.

Technical specifications

9 specifications

Identity
Brand	Waterpik
Model	WF-20CD010

Flossing and reservoir
Pressure settings	2 pressure settings (low/high)
Reservoir capacity	6 oz
Continuous flossing time per fill	up to 45 seconds

Battery and charging
Battery	1 Lithium Ion batteries required. (included)
Claimed runtime per charge	up to 9 weeks
Charging connection	USB-C charging capability

Dimensions and installation
Dimensions listed	3.7 x 2.5 x 11.88 inches; 10.4 ounces

What to know before buying

Battery runtime is a listing claim, not a guaranteed duration, customer feedback reports mixed battery life and power, as well as concerns about durability and the small reservoir. The USB-C to USB-A cable is listed as included, but a USB-A wall adapter is not included.

Who is it for?

A good fit for

Travelers or people with limited bathroom space who prefer a cordless flosser.
Buyers seeking two pressure settings and a compact removable reservoir.

Less suited to

People who prioritize a larger reservoir or do not want to refill during a longer session.

Waterpik Cordless Pulse 3100 WF-20 Rechargeable Water Flosser · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.2 / 5 · 15,659 ratings

5 stars65%65%
4 stars14%14%
3 stars9%9%
2 stars4%4%
1 star8%8%

Customer feedback describes effective cleaning between teeth and along the gumline and appreciates portability for travel and small bathrooms. Battery life and power draw mixed reports, while the supplied summary also notes complaints about the small reservoir and durability, including reports of failures after two months. These concerns matter for buyers expecting long sessions or dependable charging, the listing's 6 oz tank and claimed runtime do not establish how an individual unit will perform. The aggregate rating is 4.2 out of 5 from 15,659 global ratings, but ratings alone do not explain the reasons behind individual experiences.

Positive themes

Customers report effective cleaning between teeth and along the gumline.
Customers appreciate portability for travel and small bathrooms.

Negative themes

The feedback summary reports durability concerns, including reports of failure after two months.
Customers criticize the reservoir size and water capacity.

Mixed feedback

Customers report mixed experiences with battery life, power, and value for money.

Frequently asked questions

How large is the reservoir?

The listing specifies a removable 6 oz reservoir and claims up to 45 seconds of continuous flossing per fill.

What tips are included?

The listing names one Precision flossing tip (JT-450E) and one Tongue Cleaner tip (TC-100E).

Is a wall adapter included?

The listing says a USB-C to USB-A cable is included and a USB-A wall adapter is not included.

What do customers report?

Customer feedback highlights cleaning effectiveness and portability, while battery life and power are mixed, the summary also reports concerns about reservoir size and durability.