Waterpik Nano Plus WP-320 Review: Compact Water Flossing for Tight Spaces

If you're short on counter space or constantly on the move, finding the right water flosser can be a challenge. Large countertop models offer power but take up valuable real estate, while some cordless options compromise on performance. Enter the Waterpik Nano Plus WP-320, a compact yet capable water flosser designed to fit into tight spaces without sacrificing the benefits of water flossing. In this review, we'll dive deep into its features, performance, and how it stacks up against other Waterpik models to help you decide if it's the right choice for your oral care routine.

The Waterpik Nano Plus WP-320 is a countertop water flosser that lives up to its 'nano' name. It's noticeably smaller than traditional countertop units, making it ideal for small bathrooms, dorm rooms, or even RVs. But don't let its size fool you – it packs the same effective water flossing technology that Waterpik is known for. We'll explore its design, ease of use, and whether it can truly replace a full-sized model.

Design and Build Quality

The Waterpik Nano Plus WP-320 features a sleek, compact design that measures just 3.5 x 3.7 x 8.2 inches and weighs only 1.1 pounds. Its footprint is about 40% smaller than standard countertop water flossers like the White Aquarius Water Flosser – White (WP-660), making it a perfect fit for cramped bathrooms. The device is constructed from durable ABS plastic with a smooth, matte finish that resists fingerprints and is easy to wipe clean. The water reservoir holds 20 ounces, which is smaller than the 22-ounce capacity of the Aquarius but sufficient for a thorough flossing session without frequent refills.

The unit comes with a comfortable ergonomic handle, a 3-foot hose, and a convenient storage compartment for up to 4 tips. The dial on the front allows you to adjust water pressure from 10 to 90 PSI, giving you full control over the intensity. The base is stable, with non-slip rubber feet that keep it in place even during vigorous use. Overall, the build quality feels solid, and the compact form factor does not compromise durability.

• Dimensions: 3.5 x 3.7 x 8.2 inches – 40% smaller than standard countertop models
• 20-ounce water reservoir with a clear window to monitor water level
• Pressure dial with 10 settings (10-90 PSI) for personalized cleaning
• Includes 4 tips: 2 classic jet tips, 1 orthodontic tip, and 1 plaque seeker tip
• Storage lid covers the tip compartment to keep everything tidy

Performance and Cleaning Effectiveness

When it comes to performance, the Nano Plus WP-320 punches above its weight. It delivers up to 90 PSI of water pressure, which is comparable to many full-sized models. The pulsating action (up to 1,200 pulses per minute) effectively removes plaque and food particles from between teeth and below the gumline. In our testing, we found that even at the highest setting, the water stream was steady and precise, allowing for a thorough clean without causing discomfort. The pressure dial is easy to adjust, so you can start with a lower setting if you have sensitive gums and gradually increase as you get accustomed.

The included tips cover various needs: the classic jet tips for general use, an orthodontic tip for braces, and a plaque seeker tip for targeting hard-to-reach areas. This versatility makes the Nano Plus suitable for most users, including those with braces or dental work. While it may not have the specialized tips like the Tongue Cleaner or Pik Pocket tip available for larger models, the essentials are covered. For those with specific oral health needs, you can purchase additional tips separately, as they are compatible with most Waterpik models.

• Up to 90 PSI water pressure – comparable to full-size countertop flossers
• 1,200 pulses per minute for effective plaque removal
• Works well for braces, implants, and general gum health
• Tips are interchangeable with other Waterpik models

Ease of Use and Maintenance

The Nano Plus is designed with user convenience in mind. Setting up the device is straightforward: place it on a flat surface, fill the reservoir with warm water, and plug it in. The cord is 3 feet long, which is adequate for most bathroom outlets. The handle is lightweight and easy to maneuver, and the on/off switch is conveniently located on the handle itself, allowing you to pause the water flow without having to reach for the unit. The reservoir is removable, making it easy to fill and clean. We recommend emptying it after each use to prevent water stagnation.

Maintenance is minimal. The unit is not dishwasher safe, but wiping it down with a damp cloth is sufficient. The tips should be replaced every 3-6 months, as recommended by Waterpik. The device itself is backed by a 2-year warranty, which gives peace of mind. One minor drawback is the shorter power cord compared to some other models, but for most bathrooms, it's not an issue. Overall, the Nano Plus is as easy to use as any countertop water flosser, if not more so, thanks to its compact size.

• Removable reservoir for easy filling and cleaning
• Handle-mounted on/off switch for convenient operation
• Cord length: 3 feet – sufficient for most setups
• 2-year manufacturer warranty

Comparison with Other Waterpik Models

To help you decide if the Nano Plus is the right fit, let's compare it to a few popular alternatives. The White Aquarius Water Flosser – White (WP-660) is a full-sized countertop model with a larger reservoir (22 oz), more pressure settings (10-100 PSI), and a wider range of included tips. It also offers a massage mode and a pause button. However, it takes up significantly more counter space. If you have ample room and want the absolute best features, the Aquarius is a great choice. But if space is at a premium, the Nano Plus offers similar pressure and effectiveness in a much smaller footprint.

On the cordless side, the White Cordless Advanced 2.0 Water Flosser – White (WP-580) offers the convenience of being rechargeable and portable, with a 16-ounce reservoir and 360-degree rotation. It's perfect for travel and use in the shower, but its maximum pressure is lower (up to 75 PSI) and you'll need to recharge it regularly. The Nano Plus, while requiring an outlet, provides consistent power and a higher pressure range. For those who prioritize power and don't mind a cord, the Nano Plus is a better value. For travel, a cordless model like the White Cordless Express Water Flosser – Black (WF-02W012) might be more suitable, but it lacks the pressure range of the Nano Plus.

• Nano Plus vs. Aquarius: Similar pressure, but Nano Plus is 40% smaller and more affordable
• Nano Plus vs. Cordless Advanced 2.0: Nano Plus offers higher pressure but requires an outlet
• Nano Plus vs. Cordless Express: Nano Plus is more powerful but less portable

Pros and Cons

Every product has its strengths and weaknesses. Here's a quick breakdown of the Nano Plus's pros and cons based on our experience.

• Pros: Compact design saves counter space; powerful up to 90 PSI; easy to use and clean; comes with 4 essential tips; affordable price point.
• Cons: Smaller reservoir requires refills for longer sessions; shorter power cord; no pause button on the handle; fewer tip options compared to larger models.

The Waterpik Nano Plus WP-320 is an excellent choice for anyone seeking a compact yet powerful water flosser. It delivers the core benefits of water flossing – plaque removal, gum health improvement, and a fresh feeling – without dominating your bathroom counter. While it lacks some premium features of larger models, its performance and convenience make it a standout in the compact category. If you're tight on space or want a reliable flosser for travel, the Nano Plus is worth serious consideration. For those who want the full-featured experience, you might explore the White Aquarius Water Flosser – White (WP-660) or the cordless convenience of the White Cordless Advanced 2.0 Water Flosser – White (WP-580).