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Waterdrop C1SL vs. Waterdrop K19-HG compared

Reverse Osmosis System

At a glance

The key numbers for both devices side by side.

Overall rating
79Gut
77Gut
Value for money
88Excellent
81Excellent
Best price
€229.00€259.00−12 %
€309.00
Price advantage
€80.00 cheaper
—
Offers
1 shop
1 shop
Rank in category
Rank 4 of 15
Rank 6 of 15

Rating

Sub-ratings compared

Waterdrop C1SLOverall rating 79Waterdrop K19-HGOverall rating 77
FiltrationperformanceFlowrate & wastewaterInstallationRunningcosts & maintenanceBuildquality & ease of use
Waterdrop C1SLWaterdrop K19-HG
Filtration performance83/10087/100
Flow rate & wastewater69/10066/100
Installation87/10089/100
Running costs & maintenance85/10077/100
Build quality & ease of use66/10057/100
Filtration performance
83
87
Flow rate & wastewater
69
66
Installation
87
89
Running costs & maintenance
85
77
Build quality & ease of use
66
57

Specs

Specs compared

Key specs

Model
C1SL
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
0.2 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
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
7 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)
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
12 months
12 months
Filter costCost of replacement filters per year based on the manufacturer’s replacement intervals, in euros
69 €/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
UV sterilizationAccording to the manufacturer, a UV lamp additionally disinfects the water
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
No
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
1 levels
4 levels
Chilled waterAccording to the manufacturer, the unit chills the water before dispensing
No

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
0.95 liters (0.25 gal)
5 liters (1.3 gal)
Refill tankCapacity of the raw water tank according to the manufacturer in liters – determines how often you refill
5 liters (1.3 gal)
5 liters (1.3 gal)

Dimensions & weight

WidthWidth of the unit according to the manufacturer in cm
29.72 cm (12 in)
20 cm (7.9 in)
DepthDepth of the unit according to the manufacturer in cm – matters for the space under the sink
21.08 cm (8.3 in)
35 cm (14 in)
HeightHeight of the unit according to the manufacturer in cm
34.8 cm (14 in)
41.5 cm (16 in)
WeightWeight without water according to the manufacturer in kg
6.2 kg (14 lb)
7.3 kg (16 lb)

General

Warranty
1 years
1 years
In the box
Gerät, C1RFG-Filter, Wassertank, Bedienungsanleitung

Prices

Offers

Waterdrop C1SL

Waterdrop K19-HG

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Verdict

Pros & cons

Die Waterdrop C1SL ist eine ordentliche Einstiegs-Osmoseanlage für die Arbeitsplatte: ohne Installation, mit Mineralstufe und einer Kartusche, die 12 Monate oder rund 4.160 l hält. Das Wasser schmeckt neutral, Chlorgeruch und Kalk im Wasserkocher verschwinden. Für ein bis zwei Personen passt sie gut. Der Haken: Es gibt nur Raumtemperatur und der Rohwassertank hinten muss ständig heraus.

Pros

  • Läuft ohne Installation, braucht nur Steckdose und 29,7 x 21,1 cm Stellfläche
  • Eine Kartusche hält 12 Monate oder rund 4.160 l
  • Sparsames Verhältnis von 3:1 Reinwasser zu Abwasser
  • Wasser schmeckt neutral, Chlorgeruch verschwindet, Wasserkocher bleibt kalkfrei
  • Werkzeugloser Filterwechsel mit Wechselanzeige
  • Pumpe filtert leise genug für die offene Wohnküche

Cons

  • Rohwassertank sitzt hinten und muss zum Füllen jedes Mal heraus
  • Kein heißes oder gekühltes Wasser, nur Raumtemperatur
  • Nur 0,95 l Reinwasser, ab drei Personen mehrmals täglich nachfüllen
  • Konzentrat fließt zurück in den Rohwassertank, Rest muss ausgeleert werden
  • Kein Systemzertifikat nach NSF/ANSI 58 für die Filterleistung

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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