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Panasonic Series 300 EW-DJ27 review

No. 9 of 10 in our water flossers ranking · Updated · How we rank

Our verdict: The Panasonic Series 300 EW-DJ27 ranks 9th of the 10 water flossers we compare, with 7.6 out of 10.

Panasonic Series 300 EW-DJ27

7.6/10

The Panasonic Series 300 EW-DJ27 is a cordless water flosser with five pressure levels and a 200ml tank. It suits people who want to start gently and like to clean the tank in the dishwasher, and who don't mind refilling mid-session.

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Why it's here

  • Five pressure levels, so you can start gently
  • Equivalent to IPX7 waterproof, with a dishwasher-safe tank
  • Four regular nozzles included
  • Non-contact charger and a light body of about 275g

Keep in mind

  • Tank is about 200ml, so refills are likely
  • Spare nozzles cost more and are harder to find than Waterpik's
  • Dearer than the big-selling budget models
  • Colour and model codes vary between retailers

Why the Panasonic Series 300 EW-DJ27 scores 7.6

Each bar shows where it places among the 10 water flossers in this guide, so a full bar is 1st of 10. How happy owners are counts for most of the score.

  • How happy owners are9th of 10
  • How many rated it10th of 10
  • How new it is5th of 10

Why it sits behind the Ordo Hydro Sonic

The Ordo Hydro Sonic (7.7) beats the Panasonic Series 300 EW-DJ27 (7.6) because it leaves owners a little happier.

About the Panasonic Series 300 EW-DJ27

The EW-DJ27 is a rechargeable, cordless oral irrigator with the water tank built into a one-piece handset. The tank holds 200ml and detaches for cleaning. The handset is waterproof to a level equivalent to IPX7, and it weighs about 275g. It stands about 294mm tall with the nozzle fitted, 63mm wide and 80mm deep.

It runs on a lithium-ion battery and charges on a non-contact charger. The mains input accepts 100 to 240V. Pressure has five levels, so you can begin on a low setting and work up. A full tank lasts roughly 50 seconds at the top level, which is why mid-session refills come up. Lower levels should stretch the water further.

Four regular nozzles come in the box, with identification rings so each person in a household can tell theirs apart. There is no orthodontic nozzle. The model code changes with colour and retailer (A311 is the blue version sold on Amazon UK), so check the code if you are buying a spare nozzle or charger.

What owners report about the Panasonic Series 300 EW-DJ27

We found very little owner feedback written about this exact model, and none from UK forum threads. What turned up is thin, so treat it as a light steer rather than a verdict.

A German test roundup that collects user comments reports that owners like the cordless use, find it effective between the teeth and find it easy to clean. The same roundup mentions some reports of failures after a period of use. It does not say how many, or after how long, so it is a flag to watch rather than a proven fault.

Who the Panasonic Series 300 EW-DJ27 suits

It suits someone new to water flossing who wants a gentle start on a low setting, a light handset that is easy to hold, and a tank that goes in the dishwasher. The four nozzles cover a small household.

Look elsewhere if you want a bigger tank, since 200ml means refilling during a full session. Brace wearers who want a dedicated orthodontic nozzle should consider the Philips Sonicare Cordless Power Flosser 3000 or the Waterpik Cordless Advanced. If you want an ultrasonic nozzle aimed at gum health, Panasonic's own Series 800 EW-DJ86 is the step up. If you are buying on price alone, the COSLUS C51 costs less.

Questions about the Panasonic Series 300 EW-DJ27

How big and heavy is the Panasonic EW-DJ27?

It is about 294mm tall with the nozzle fitted, 63mm wide and 80mm deep, and weighs about 275g.

How long does one tank last on the Panasonic EW-DJ27?

About 50 seconds at the highest pressure level, from the 200ml tank. Lower levels use water more slowly, so expect to refill during a full clean.

Is the Panasonic EW-DJ27 tank dishwasher safe?

Yes. The 200ml tank detaches from the handset and is dishwasher safe.

Is the Panasonic EW-DJ27 rechargeable?

Yes. It has a built-in lithium-ion battery and charges on a non-contact charger, with a 100 to 240V input.

What's the difference between the Panasonic EW-DJ27 and the EW-DJ86 Series 800?

The EW-DJ27 is Panasonic's entry flosser with five pressure levels and regular nozzles. The Series 800 EW-DJ86 is the ultrasonic-nozzle model aimed at gum health.

Other water flosser picks

The other badge winners in our water flossers ranking.

All 10 water flossers, compared

  1. 1 COSLUS C50Best Choice 8.6 Check Price
  2. 2 COSLUS C51 8.6 Check Price
  3. 3 Waterpik Cordless Pulse 8.6 Check Price
  4. 4 Bezvoi Mini Portable Water Flosser for Travel, 5 Modes, 6 Tips 8.5 Check Price
  5. 5 Waterpik Cordless AdvancedBest Premium 8.2 Check Price
  6. 6 Hangsun HOC700 8.1 Check Price
  7. 7 Philips Sonicare Cordless Power Flosser 3000 8.0 Check Price
  8. 8 Ordo Hydro Sonic 7.7 Check Price
  9. 9 Panasonic Series 300 EW-DJ27This review 7.6 Check Price
  10. 10 Panasonic Series 800 EW-DJ86 7.6 Check Price
See the full water flossers ranking

The Panasonic Series 300 EW-DJ27 on Amazon

Panasonic Series 300 EW-DJ27

The Panasonic Series 300 EW-DJ27 is a cordless water flosser with five pressure levels and a 200ml tank. 7.6 out of 10.

Check Price on Amazon

How we score it

Every score here comes from our ranking model; no editor sets the order. Too few review sites cover water flossers for their verdicts to lead, so this ranking is led by owners. It ranks products by how happy owners are, holding back any product few owners have rated until more agree. How many rated it and how new it is only settle close calls, and value for money earns its own badge rather than a higher place. We compared 23 models for this guide before settling on these ten.

Brands can't pay to be included or to move up. We last checked these picks in October 2026.

How we rank, in full

Where these facts come from