A water pick, more commonly called a water flosser, is a handheld oral hygiene device that shoots a thin, pulsating stream of water to clean between your teeth and along your gumline. It works as an alternative or complement to traditional string floss, using fluid pressure rather than physical contact to dislodge plaque and food debris. Several models have earned the ADA Seal of Acceptance for safety and effectiveness at removing plaque and helping prevent gingivitis.
How a Water Pick Works
The device consists of a water reservoir, a small motor-driven pump, and a handheld wand with an interchangeable tip. When you turn it on, the pump sends rapid pulses of water through the tip, creating a focused stream that hits the tooth surface and gumline. This pulsation generates a hydrodynamic effect: the high-velocity water produces fluid shear forces that physically break apart and flush away plaque biofilm. Some models also mix tiny air bubbles into the water stream, adding a vibration-like impact that further loosens debris.
The key advantage over string floss is reach. The pressurized stream can access deep pockets between teeth, tight spaces around dental work, and areas below the gumline that a piece of floss or a toothbrush simply can’t get to as easily.
Water Picks vs. String Floss
Research consistently shows water flossers perform at least as well as string floss for plaque removal, and in several studies they come out ahead. One clinical trial found that water flossing reduced whole-mouth plaque by 74.4%, compared to 57.7% for string floss. The gap was even wider in the hard-to-reach spaces between teeth: 81.6% plaque reduction for the water flosser versus 63.4% for string floss. Multiple other studies confirm this pattern, with water flossers producing greater mean plaque score improvements across different patient populations.
That said, not every study shows a dramatic difference. One single-use comparison found nearly identical results: 87.2% reduction for the water flosser and 89.1% for regular floss. The takeaway is that both tools work. The best one is whichever you’ll actually use consistently.
Who Benefits Most
Water picks are especially useful if you have braces. Orthodontic brackets and wires create dozens of tiny spaces where food and plaque collect, and threading string floss around each bracket is slow and frustrating. The pulsating water stream dislodges debris from around brackets without the awkward threading. In a clinical trial of orthodontic patients, water flossing produced a slightly higher plaque reduction and bleeding reduction compared to interdental flossing after two weeks, with a gentler, less uncomfortable experience overall.
People with dental implants also benefit. Water flossers can reduce inflammation around implants, and using one with an antimicrobial rinse in the reservoir appears to be a particularly effective home-care strategy for keeping implant tissues healthy long-term.
If you have limited hand dexterity from arthritis, a neurological condition, or aging, a water flosser is far easier to maneuver than string floss. The same goes for anyone with bridges, crowns, or other fixed dental work that makes traditional flossing difficult.
Types of Tips
Most water picks come with a standard jet tip and offer several specialized tips you can swap in:
- Classic jet tip: The default, general-purpose tip for everyday cleaning along the gumline and between teeth.
- Orthodontic tip: Has a small tapered brush at the end, designed to clean around brackets and wires.
- Pik Pocket tip: A soft, flexible rubber tip meant for gently delivering water into deeper gum pockets, useful if you have periodontal issues.
- Plaque seeker tip: Features thin bristles that make contact with the tooth surface while water flows through, combining light brushing with irrigation.
- Tongue cleaner tip: A flat, spoon-shaped attachment for scraping and rinsing the tongue.
How to Use a Water Pick
Start by filling the reservoir with warm water. Lean over the sink and place the tip in your mouth before turning the device on, otherwise you’ll spray water everywhere. Begin on a low pressure setting, especially if your gums are sensitive or inflamed. You can increase the pressure as you get comfortable.
Hold the classic jet tip at a 90-degree angle to your teeth and follow the contour of your gumline, pausing briefly between each tooth to let the water flush the gap. Work systematically from the back teeth on one side to the other so you don’t miss any spots. The whole process takes about two minutes. If you’re using a Pik Pocket tip for deeper gum pockets, angle it at 45 degrees, keep the pressure on its lowest setting, and let the water flow gently below the gumline.
You can water floss before or after brushing. Some people prefer before, since removing debris first lets toothpaste reach more tooth surface. Others prefer after, to rinse away loosened plaque. Either order works.
Safety Considerations
Water flossers are generally safe when used within the manufacturer’s recommended pressure settings. Pressures up to 70 to 90 psi are considered safe for healthy, intact gum tissue. For inflamed, ulcerated, or non-keratinized tissue (the softer tissue inside your cheeks or deep in gum pockets), staying below 50 to 70 psi is recommended to avoid irritation. In practice, this means starting on a low setting and increasing gradually.
One risk worth noting: water flossing can cause a brief spike in bacteria entering the bloodstream, a condition called transient bacteremia. For most people this is harmless and resolves on its own. However, a small number of case reports have linked oral irrigation to bacterial heart valve infections. If you have a heart condition that puts you at risk for infective endocarditis, or if you have a prosthetic heart valve, talk to your cardiologist before using a water pick regularly.
Cleaning and Maintenance
Bacteria and mineral deposits can build up inside the reservoir and tubing over time. Waterpik recommends cleaning your device once a month with a simple vinegar solution: mix one part white vinegar with two parts warm water, pour it into the reservoir, and run the entire mixture through the flosser. Before that step, soak the tip (and the handle, for countertop models) in the same one-to-two vinegar-to-water ratio for five minutes.
Replace your flosser tips every three to six months, or sooner if the bristles on specialty tips look worn. Between uses, eject the tip and let both the tip and reservoir air dry to discourage mold growth.