Waterpik Aquarius Countertop Water Flosser WP-660 vs Waterpik Cordless Pulse Water Flosser 3100
What owners say · Updated October 2026
The Waterpik Aquarius is a high-capacity countertop unit built for continuous daily use, whereas the Cordless Pulse 3100 is a compact model built for shower use. Owners experience trade-offs between reservoir capacity and portability, alongside distinct leakage and maintenance concerns.
Waterpik
Waterpik Aquarius Countertop Water Flosser WP-660
“Unmatched dental cleaning performance that transforms gum health, offset by plastic build quality and long-term leak issues.”
Choose it if you want a countertop unit with a large water reservoir and 10 levels of pressure customization for complex dental work.
Waterpik
Waterpik Cordless Pulse Water Flosser 3100
“The Waterpik Cordless Pulse 3100 delivers serious plaque-fighting power and shower-friendly convenience, but long-term durability and frequent water refills frustrate owners.”
Choose it if you prefer a compact, waterproof flosser with a non-slip grip for shower use.
At a glance
| Waterpik Aquarius Countertop Water Flosser WP-660 | Waterpik Cordless Pulse Water Flosser 3100 | |
|---|---|---|
| Ease of use and design complaints | 0% of reports | 30% of reports |
Share of each model's owner reports raising ease of use and design; the category average is 16%.
Where owners report a difference
| Waterpik Aquarius Countertop Water Flosser WP-660 | Waterpik Cordless Pulse Water Flosser 3100 | |
|---|---|---|
| Reservoir capacity and refilling | Owners report that the large 22-ounce reservoir allows over 90 seconds of continuous flossing without refilling. | Owners report that the small reservoir requires frequent refilling during a single cleaning session. |
| Placement and shower compatibility | Owners note that the unit requires counter space and is not suitable for travel or shower use. | Owners note that the waterproof design allows for convenient use directly in the shower. |
| Cleaning around dental work | Owners state it is an essential tool for cleaning around braces, crowns, implants, and complex dental work. | Owners state it effectively reaches around dental work such as braces, crowns, and retainers. |
| Hardware durability and leaks | Owners report frequent leaks from the hose, handle, and base, along with plastic components that become brittle over time. | Owners report leaking components and a fragile reservoir chamber prone to cracking. |