The Waterpik WP-660 and Philips Sonicare HX3711/20 are two exact countertop models with different manufacturer feature records. A useful comparison keeps those records separate instead of treating a setting, mode, tip, nozzle, or tank figure as a universal score.
This guide compares only registered manufacturer specifications and practical buying constraints. It is not hands-on testing, a cleaning-performance comparison, or individualized dental advice.
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1. Start with the exact model identities
This comparison is limited to the white Waterpik Aquarius WP-660 and Philips Sonicare Power Flosser 3000 HX3711/20. Similar colors, product-family names, and other model configurations are not interchangeable with these identities.
Confirm the complete model number on the manufacturer page, retailer listing, package, and order before using any specification below. Stop when those identities do not match rather than borrowing a fact from a nearby configuration.
- Match WP-660 exactly for the Waterpik record.
- Match HX3711/20 exactly for the Philips countertop record.
- Do not transfer specifications from another color or cordless family member.
2. Compare control systems without equating their labels
Waterpik lists 10 pressure settings for the WP-660. Philips lists two flossing modes and 10 intensity settings for the HX3711/20. These are manufacturer-specific controls, not common measurement units.
Use the lists to decide which interface you are prepared to understand and use consistently. Do not infer that matching counts create matching feel, range, pressure, performance, or a clinically appropriate personal setting.
- Treat 10 Waterpik pressure settings as one documented control system.
- Treat two Philips modes and 10 intensities as a separate documented control system.
- Ask a dental professional for individualized setting or technique guidance.
3. Keep unlike reservoir figures in their original form
Waterpik rates the WP-660 reservoir for 90 or more seconds. Philips lists a 550 ml tank for the HX3711/20. One is a manufacturer time rating and the other is a capacity, so they should not be converted into a claimed head-to-head session result.
Decide whether refill interruption matters to the planned routine, then verify the current official record. Individual settings and use patterns can affect how a tank fits a routine, and neither figure proves a health or cleaning outcome.
- Preserve Waterpik's 90-or-more-second rating as a rating.
- Preserve Philips' 550 ml figure as a tank capacity.
- Do not manufacture a winner by converting unlike specifications.
4. Count only included parts that matter to the routine
Waterpik lists seven included tips plus a one-minute timer with a 30-second pacer for the WP-660. Philips lists Standard and Quad Stream nozzles with the HX3711/20.
Package contents and control features can organize a buying checklist, but they do not establish which tip, nozzle, or routine is appropriate for an individual. Verify the current exact package rather than relying on a product-family image or a nearby listing.
- Check the exact included-tip count for the WP-660 package.
- Check for the listed Standard and Quad Stream nozzles in the HX3711/20 package.
- Do not treat more included parts as automatic evidence of better fit.
5. Apply the documented power constraint before softer preferences
Waterpik identifies the WP-660 as a corded countertop model for North American 120V/60Hz outlets and lists a three-year limited warranty. Do not describe this exact model as globally voltage-compatible.
The registered Philips facts used here establish the HX3711/20 countertop identity but do not establish a voltage specification. Verify its current official power instructions directly before planning an outlet, adapter, or travel arrangement rather than filling that gap by inference.
- Eliminate the WP-660 when its documented North American power requirement does not fit.
- Confirm the exact Philips power instructions before purchase.
- Plan a stable, dry location and realistic accessory storage for either countertop format.
6. Recheck the exact purchase path
Use the official manufacturer pages for the registered specifications. Use each exact Amazon listing only to confirm model identity, package, seller, availability, delivery, and return terms, recognizing that transaction details vary by time, location, and session.
An exact model can remain editorially relevant when its paid destination is not commercially usable. Pause or omit that paid link when no legitimate exact purchase path is available instead of substituting a similar model.
- Match the exact model and ASIN before checkout.
- Recheck the current seller and purchase path immediately before buying.
- Choose from verified room, power, control, refill, package, and storage constraints rather than a universal ranking.
SOURCES & SCOPE
Trace every factual edge.
Product specifications are manufacturer statements unless explicitly labeled otherwise. General oral-health context comes from the ADA. This page provides general information, not individualized dental advice.
- Waterpik - Aquarius WP-660 official specifications
- Philips - Power Flosser 3000 HX3711/20 official specifications
Registered claims used on this page
wp660-core-specs- Attribute these specifications to Waterpik and recheck the official model page before publication.wp660-use-profile- Do not describe this North American model as globally voltage-compatible.philips-core-specs- Attribute these specifications to Philips and recheck the official US model page before publication.philips-tank-spec- Keep the claim to the listed tank capacity; do not promise a specific session length for every user.