Waterpik Aquarius WP-660 Countertop Water Flosser 10 Settings Like New

Like new — tested and fully working with minor signs of use and minor cosmetic marks.

Overview

The Waterpik Aquarius Countertop Water Flosser (model WP-660/660C) is the gold standard in at-home oral irrigation. As the #1 water flosser brand recommended by dental professionals and the first to earn the American Dental Association (ADA) Seal of Acceptance, the Aquarius delivers a clinically proven clean that traditional floss simply cannot match. Powered by PrecisionPulse technology, it combines adjustable water pressure and pulsations to remove up to 99.9% of plaque bacteria from treated areas, making it an excellent choice for everyday users, orthodontic patients, and anyone with periodontal concerns.

The unit features 10 pressure settings covering both Floss and Massage modes, letting every member of the household dial in exactly the right intensity. The large 22 oz removable reservoir provides 90+ seconds of continuous use so you never have to stop and refill mid-session. The reservoir is top-rack dishwasher safe for effortless cleaning. A compact, maneuverable flossing wand makes it easy to reach back teeth and tight spaces that are hard to access with traditional floss.

This unit was photographed with all 7 tips laid out and verified present. It is in excellent cosmetic shape with only minor marks consistent with careful prior use, and it passed our full functional test.

What's Included

• Waterpik Aquarius Water Flosser (WP-660/660C) — White
• 4× Precision Tips (JT-100E)
• 1× Orthodontic Tip (OD-100E)
• 1× Pik Pocket Tip (PP-100E)
• 1× Plaque Seeker Tip (PS-100E)
• Power cord

Specifications

• Model: WP-660 / WP-660C
• Color: White
• Pressure Settings: 10 (Floss & Massage modes)
• Reservoir Capacity: 22 oz (removable, top-rack dishwasher safe)
• Run Time: 90+ seconds per fill
• Tips Included: 7
• Dimensions: 10.35 × 3.8 × 4.7 inches
• Warranty: 3-year limited manufacturer's warranty
• Certification: ADA Seal of Acceptance

Pick up a fully featured, dentist-recommended water flosser at a fraction of the retail price. Our grade-A units are tested before listing so you can shop with confidence.