Electric Toothbrush With Water Flosser: Combo Units

An electric toothbrush with a built-in water flosser comes in two forms: a single handle that brushes, flosses or does both through one head, or a single base that powers a separate brush and a separate flosser. Waterpik sells one of each — the Sonic-Fusion 2.0 and the Sensonic Complete Care — and on 22 September 2026 its store listed them at $139.99 on sale and $199.99.

Before you buy either, know the cheap alternative. The NHS recommends cleaning between your teeth every day with floss or interdental brushes, and both cost a small fraction of a combo unit. A combo is a convenience, not a requirement, and recommending floss pays us nothing. We have not tested either Waterpik unit; everything below is from Waterpik's own product pages.

Two ways to combine a brush and a flosser

The first design puts the flosser inside the brush head. Waterpik's Sonic-Fusion 2.0 has "flossing technology … built into the patented brush head", so one handle lets you "brush, water floss, or both at the touch of a button". Water comes from a removable reservoir in the base, through a hose to the handle.

The second design shares a base. Waterpik's Sensonic Complete Care "combines the WATERPIK water flosser with the award-winning SENSONIC toothbrush" — two separate tools, one countertop unit. You brush with one and floss with the other, as you would with two separate devices.

Waterpik Sonic-Fusion 2.0: one handle, both jobs

The Sonic-Fusion 2.0 is the all-in-one design. Waterpik lists a two-minute brushing timer with a 30-second pacer, high and low brush settings, LED mode lights, a removable reservoir with "60+ seconds of flossing time", global voltage, and a premium toothbrush case. The standard model comes with one compact flossing brush head.

On 22 September 2026 Waterpik's store showed it at $139.99, down from $179.99, with a three-year limited warranty. A Professional version, with two heads (one full-size, one compact), was $199.99, down from $249.97. Waterpik says the Sonic-Fusion 2.0 is accepted by the American Dental Association for safety and effectiveness. See the Sonic-Fusion 2.0 on Amazonaffiliate.

Waterpik Sensonic Complete Care: two tools, one base

The Sensonic Complete Care pairs a full water flosser with a separate rechargeable brush. Waterpik lists 10 flosser settings, 5 specialty tips and a reservoir with "90+ seconds of flossing time" on the flosser side, and three brush modes — clean, stain removal and gum care — on the brush.

It was $199.99 on Waterpik's store on 22 September 2026, with a two-year limited warranty, and Waterpik says it too is accepted by the ADA for safety and effectiveness. Because the flosser is a full countertop unit, it offers more settings and tips than the all-in-one handle, at the cost of more counter space. See the Complete Care on Amazonaffiliate.

Running costs: heads for a combo

The heads on an all-in-one handle are the running cost, as with any electric brush. On 22 September 2026 Waterpik's store listed a 4-pack of compact Sonic-Fusion flossing heads at $29.99 and a 6-pack of full-size heads at $49.99.

At the ADA's replacement interval of every three to four months, one person needs three or four heads a year. Four compact heads cost $29.99, so a year at the three-month interval costs $29.99; four full-size heads, at $49.99 for six, work out at about $33.33. Those are Waterpik's prices on one day; check them where you shop before you commit to the handle.

The Complete Care's brush takes its own Sensonic heads, sold separately; we did not read a per-head price for them, so we have not worked out a yearly figure.

About the "more effective" claims

Waterpik makes effectiveness claims for both units, and they are its own. It says the Sonic-Fusion 2.0 is "up to 2X as effective as traditional brushing and flossing" for reducing plaque in hard-to-reach areas and improving gum health, and that the Complete Care's brush and flosser used together are "up to 3X as effective as manual brushing for improving gum health". Both claims rest on data Waterpik describes as "on file", based on brushing for two minutes and flossing for one.

We have not seen those studies, so we report the claims as Waterpik's and do not repeat them as findings. The independent evidence we cite elsewhere, the 2014 Cochrane review of powered brushes, compared brushes with brushes and says nothing about water flossers.

Who a combo suits

A combo makes most sense for someone who will actually use a water flosser every day and wants one unit instead of two. If string floss is awkward for you and a separate flosser would sit unused, having it in the same handle or base may make the habit stick.

It suits less well if you travel often, share a small bathroom, or already floss well. Waterpik does list global voltage and a toothbrush case for the Sonic-Fusion 2.0, so it can travel, but its reservoir base is still one more thing to pack. The units need a reservoir of water and counter space, and the brush side is only as good as its own features: the Sonic-Fusion 2.0 lists a timer and pacer, but neither Waterpik page we read lists a pressure sensor.

The cheaper way to clean between teeth

String floss or interdental brushes do the same basic job for far less money. The NHS advice is to clean between your teeth every day "using floss or interdental brushes", and it says regular flossing may reduce gum disease, tooth decay and bad breath.

If you are unsure which size of interdental brush fits your gaps, ask your dentist or hygienist at your next check-up. None of these options pays us anything. For a brush alone, our comparison of eight electric toothbrushes sets timers, pressure sensors and prices side by side.

If your gums bleed when you floss

Gums that bleed when you clean between your teeth, or look swollen, red or sore, are a reason to see a dentist; the NHS lists these as signs of gum disease. A combo unit is not a treatment.

For how to use the brush side properly — light grip, slow glide, 30 seconds per quarter — see our guide to using an electric toothbrush.