Select and compare
Waterdrop A2G vs. Waterdrop K19-HG compared
Reverse Osmosis System
At a glance
The key numbers for both devices side by side.
Overall rating
7575Gut
7777Gut
Value for money
68Fair
81Excellent
Best price
€449.00€499.00−10 %
€309.00
Price advantage
—
€140.00 cheaper
Offers
2 shops
1 shop
Rank in category
Rank 7 of 15
Rank 6 of 15
Rating
Sub-ratings compared
Waterdrop A2GOverall rating 75Waterdrop K19-HGOverall rating 77
Waterdrop A2GWaterdrop K19-HG
Filtration performance75/10087/100
Flow rate & wastewater75/10066/100
Installation89/10089/100
Running costs & maintenance73/10077/100
Build quality & ease of use60/10057/100
Filtration performance
75
87
Flow rate & wastewater
75
66
Installation
89
89
Running costs & maintenance
73
77
Build quality & ease of use
60
57
Specs
Specs compared
Key specs
Model
A2G
K19-HG
TypeInstallation type according to the manufacturer – under-sink systems connect to the water line under the sink, countertop units sit on the worktop and are filled by hand
Countertop (no installation)
Countertop (no installation)
Flow ratePure water flow rate according to the manufacturer in liters per minute – 400 GPD (gallons per day) equals about 1.05 liters per minute
0.26 l/min
0.2 l/min
Pure-to-waste ratioRatio of pure water to wastewater according to the manufacturer – at 3:1, one liter goes down the drain for every three liters of drinking water; higher is more economical; if there is more wastewater than pure water, enter a decimal, so 1:3 as 0.33
3 :1
3 :1
TankWhether, according to the manufacturer, the unit stores filtered water in a storage tank or filters on demand – the refill tank of a countertop unit does not count here
With storage tank
Tankless (direct flow)
RemineralizationAccording to the manufacturer, adds minerals such as calcium and magnesium back to the filtered water
Yes
Yes
Filter & maintenance
Filter stagesNumber of filter stages according to the manufacturer, including the membrane
6 levels
7 levels
CertificationStandards the unit is certified to according to the manufacturer – only actual certifications, not “tested to the standard”; NSF/ANSI 58 only if the whole system is certified, “certified elements” or “components” do not count
NSF/ANSI 372 (low lead)
NSF/ANSI 58 (reverse osmosis)NSF/ANSI 372 (low lead)
Pre-filter replacementRecommended pre-filter replacement interval according to the manufacturer in months
12 months
Membrane replacementRecommended replacement interval of the reverse osmosis membrane according to the manufacturer in months
12 months
12 months
Filter costCost of replacement filters per year based on the manufacturer’s replacement intervals, in euros
79.99 €/year
89.99 €/year
Tool-free filter changeAccording to the manufacturer, filters can be changed without tools
Yes
Yes
Standard filterAccording to the manufacturer, the unit uses filters in a standard size (e.g. 10 inches) that other brands also sell – not proprietary cartridges
No
Filter change indicatorAccording to the manufacturer, the unit shows the filter status or when a change is due
Yes
Yes
TDS displayAccording to the manufacturer, displays the water’s TDS value, i.e. the amount of dissolved solids
No
UV sterilizationAccording to the manufacturer, a UV lamp additionally disinfects the water
Yes
Yes
Alkaline waterA mineral filter raises the water’s pH according to the manufacturer (alkaline mineralization)
Yes
Yes
Hot water & cooling
Hot waterAccording to the manufacturer, the unit dispenses hot water, e.g. for tea
Yes
Yes
Max. water temperatureMaximum dispensing temperature according to the manufacturer in °C
95 °C (203 °F)
95 °C (203 °F)
Heat settingsNumber of selectable dispensing temperatures according to the manufacturer, room temperature included – not the volume settings
6 levels
4 levels
Child lockAccording to the manufacturer, hot water can only be dispensed after unlocking, e.g. via a key lock or a second press
Yes
Chilled waterAccording to the manufacturer, the unit chills the water before dispensing
Yes
Power consumption when heatingMaximum power consumption according to the manufacturer in watts, when dispensing hot water – not the power while filtering
1,530 W
Standby powerPower consumption in standby mode according to the manufacturer in watts
9 W
Connection & controls
DispensingDispensing point included, according to the manufacturer
None (countertop unit)
None (countertop unit)
Power connection requiredAccording to the manufacturer, the unit needs a power connection, e.g. for the pump – tankless systems usually have a built-in pump
Yes
Yes
Tank capacityStorage tank volume according to the manufacturer in liters
1 liters (0.26 gal)
5 liters (1.3 gal)
Refill tankCapacity of the raw water tank according to the manufacturer in liters – determines how often you refill
4.7 liters (1.2 gal)
5 liters (1.3 gal)
Dimensions & weight
WidthWidth of the unit according to the manufacturer in cm
20.8 cm (8.2 in)
20 cm (7.9 in)
DepthDepth of the unit according to the manufacturer in cm – matters for the space under the sink
40.4 cm (16 in)
35 cm (14 in)
HeightHeight of the unit according to the manufacturer in cm
39.9 cm (16 in)
41.5 cm (16 in)
WeightWeight without water according to the manufacturer in kg
10 kg (22 lb)
7.3 kg (16 lb)
General
Warranty
1 years
1 years
In the box
Gerät, Filter, Karaffe, Bedienungsanleitung
Prices
Offers
Verdict
Pros & cons
Die Waterdrop A2G ist eine Auftisch-Osmoseanlage, die ohne Installation heißes und gekühltes Wasser liefert, von 15 bis 95 °C. Sie passt zu ein bis zwei Personen in der Mietwohnung, die täglich Tee oder Kaffee kochen. Die Filterkartusche wechselst du einmal im Jahr ohne Werkzeug. Dafür nimmst du einen gut hörbaren Kompressor in Kauf, und der 4,7-l-Tank muss täglich nachgefüllt werden.
Pros
- Heiß- und Kaltwasser von 15 bis 95 °C in sechs Stufen, ohne Installation
- Sparsames Verhältnis von 3:1 Reinwasser zu Abwasser
- Kartusche hält 12 Monate und wird ohne Werkzeug gewechselt
- Mineralisierung macht das Wasser milder, gut für Tee und Kaffee
- Kindersicherung per Entsperrtaste für heißes Wasser
- UV-Entkeimung, Tank und Karaffe leicht herausnehmbar
Cons
- Kompressor brummt hörbar und springt immer wieder an
- Tank mit 4,7 l reicht einer Person nur etwa einen Tag
- Karaffe und Tank tropfen beim Herausnehmen auf die Arbeitsplatte
- Erster Schwall Heißwasser kommt lauwarm, Kühlung lässt nach 250 ml nach
- Keine TDS-Anzeige, herstellereigene Kartusche statt Standardfilter
Der Waterdrop K19-HG ist ein Auftischgerät, das Osmosewasser bis 95 °C ohne Installation liefert, und das komplette System ist nach NSF/ANSI 58 zertifiziert. Er passt zu Ein- und Zwei-Personen-Haushalten in Mietwohnung oder Büro, die vor allem Tee und Kaffee zubereiten. Der Haken: höchstens 750 ml am Stück, häufiges Nachfüllen des 5-l-Tanks und Probleme bei sehr hartem Wasser.
Pros
- Ganzes System nach NSF/ANSI 58 zertifiziert, nicht nur einzelne Bauteile
- Heißwasser in vier Stufen von 50 bis 95 °C, Portionen von 150 bis 750 ml
- Keine Installation nötig, nur Steckdose und Arbeitsplatte
- Sparsames Verhältnis 3:1 von Reinwasser zu Abwasser
- Nur eine Kartusche für 12 Monate, Wechsel ohne Werkzeug
- Gefiltertes Wasser schmeckt sauber und weicher als aus dem Hahn
Cons
- Bei sehr hartem Wasser verkalken Tank und Pumpe teils nach wenigen Tagen
- Höchstens 750 ml am Stück, danach knapp 4 min Nachfiltern
- 5-l-Tank muss im Zwei-Personen-Haushalt oft täglich nachgefüllt werden
- Abstellfläche nicht höhenverstellbar, Wasser spritzt über den Glasrand
- Kein Standardfilter, Ersatzkartusche nur von Waterdrop
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