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iSpring RCC7AK Umkehrosmose vs. Waterdrop K19-HG compared
Reverse Osmosis System
At a glance
The key numbers for both devices side by side.
Overall rating
8989Gut
7777Gut
Value for money
95Excellent
81Excellent
Best price
€81.99
€309.00
Price advantage
€227.01 cheaper
—
Offers
2 shops
1 shop
Rank in category
Rank 2 of 15
Rank 6 of 15
Rating
Sub-ratings compared
iSpring RCC7AK UmkehrosmoseOverall rating 89Waterdrop K19-HGOverall rating 77
iSpring RCC7AK UmkehrosmoseWaterdrop K19-HG
Filtration performance94/10087/100
Flow rate & wastewater80/10066/100
Installation84/10089/100
Running costs & maintenance90/10077/100
Build quality & ease of use82/10057/100
Filtration performance
94
87
Flow rate & wastewater
80
66
Installation
84
89
Running costs & maintenance
90
77
Build quality & ease of use
82
57
Specs
Specs compared
Key specs
Model
RCC7AK
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
Under-sink
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
0.2 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
0.33 :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
Rejection rateHow much of the dissolved solids (TDS) the membrane retains according to the manufacturer, in percent
93 %
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 58 (reverse osmosis)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
12 months
Membrane replacementRecommended replacement interval of the reverse osmosis membrane according to the manufacturer in months
36 months
12 months
Filter costCost of replacement filters per year based on the manufacturer’s replacement intervals, in euros
95 €/year
89.99 €/year
Tool-free filter changeAccording to the manufacturer, filters can be changed without tools
No
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
No
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
No
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
Max. water temperatureMaximum dispensing temperature according to the manufacturer in °C
95 °C (203 °F)
Heat settingsNumber of selectable dispensing temperatures according to the manufacturer, room temperature included – not the volume settings
4 levels
Connection & controls
DispensingDispensing point included, according to the manufacturer
Separate faucet
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
No
Yes
Tank capacityStorage tank volume according to the manufacturer in liters
12.11 liters (3.2 gal)
5 liters (1.3 gal)
Refill tankCapacity of the raw water tank according to the manufacturer in liters – determines how often you refill
12.11 liters (3.2 gal)
5 liters (1.3 gal)
App controlFilter status and water values via app, according to the manufacturer
No
Noise levelPump noise while filtering according to the manufacturer in dB
23.4 dB
Dimensions & weight
WidthWidth of the unit according to the manufacturer in cm
13.3 cm (5.2 in)
20 cm (7.9 in)
DepthDepth of the unit according to the manufacturer in cm – matters for the space under the sink
13.3 cm (5.2 in)
35 cm (14 in)
HeightHeight of the unit according to the manufacturer in cm
47 cm (19 in)
41.5 cm (16 in)
WeightWeight without water according to the manufacturer in kg
12.5 kg (28 lb)
7.3 kg (16 lb)
General
Warranty
1 years
1 years
In the box
Osmoseanlage 6-stufig, 3,2-Gallonen-Vorratstank, separater Wasserhahn mit Top-Mount-Kit, Filtergehäuseschlüssel
Prices
Offers
Verdict
Pros & cons
Die iSpring RCC7AK ist eine klassische Untertischanlage mit Vorratstank, die Blei, Uran und Nitrat gründlich aus dem Wasser holt und dank Standardfiltern niedrige Folgekosten hat. Sie passt zu Haushalten mit hartem Wasser, alten Leitungen und viel Platz im Spülenschrank. Der Haken: 2,1 bis 2,5 l Abwasser je Liter, ein langsam füllender Tank und ein mitgelieferter Hahn, der oft tropft.
Pros
- Entfernt Blei, Arsen, Uran und Mikroplastik im Labor zu 100 %
- Senkt Fluorid um 87 bis 99 % und Nitrat um 85 bis 95 %
- Gelöste Salze sinken von 635 auf 44 ppm
- Systemzertifikat nach NSF/ANSI 58 für die ganze Anlage
- Niedrige Filterkosten durch Standardkartuschen, Membran hält 36 Monate
- Läuft ohne Strom, Boosterpumpe bei Bedarf nachrüstbar
Cons
- 2,1 bis 2,5 l Abwasser je Liter Trinkwasser ohne Pumpe
- Mitgelieferter Hahn tropft und sitzt locker, auch Steckverbindungen lecken
- Tank füllt sich langsam, rund 134 statt 284 l am Tag
- T-Stück passt nicht ans deutsche Eckventil, Adapter auf G 3/8 nötig
- Filterwechsel nur mit Schlüssel, ohne Wechselanzeige
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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