The verdict
The Aquarius WP-660 is the best-overall pick — Waterpik's countertop flagship with most settings and tip options.
Waterpik Aquarius WP-660
Strengths
- +10 pressure settings — most adjustability in this lineup
- +7 tip variations (orthodontic, plaque, periodontal, etc.)
- +Massage mode for gum stimulation
- +Waterpik clinical reputation
Watch-outs
- −Countertop only — no portability
- −2-minute reservoir runtime
- −Splatter learning curve
How it compares
Most settings and tips. Countertop. Best clinical reputation.
Who this is for
At a glance: users committed to daily flossing with multiple oral conditions.
Why you’d buy the Waterpik Aquarius WP-660
- 10 pressure settings — most adjustability in this lineup.
- 7 tip variations (orthodontic, plaque, periodontal, etc.).
- Massage mode for gum stimulation.
Why you’d skip it
- Countertop only — no portability.
- 2-minute reservoir runtime.
- Splatter learning curve.
Rating sources
Our 4.8 score is the average of these published ratings. More about methodology.