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iSpring RCC7AK Umkehrosmose vs. Waterdrop C1SL compared

Reverse Osmosis System

At a glance

The key numbers for both devices side by side.

Overall rating
89Gut
79Gut
Value for money
95Excellent
88Excellent
Best price
€81.99
€229.00€259.00−12 %
Price advantage
€147.01 cheaper
—
Offers
2 shops
1 shop
Rank in category
Rank 2 of 15
Rank 4 of 15

Rating

Sub-ratings compared

iSpring RCC7AK UmkehrosmoseOverall rating 89Waterdrop C1SLOverall rating 79
FiltrationperformanceFlowrate & wastewaterInstallationRunningcosts & maintenanceBuildquality & ease of use
iSpring RCC7AK UmkehrosmoseWaterdrop C1SL
Filtration performance94/10083/100
Flow rate & wastewater80/10069/100
Installation84/10087/100
Running costs & maintenance90/10085/100
Build quality & ease of use82/10066/100
Filtration performance
94
83
Flow rate & wastewater
80
69
Installation
84
87
Running costs & maintenance
90
85
Build quality & ease of use
82
66

Specs

Specs compared

Key specs

Model
RCC7AK
C1SL
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
With storage tank
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)
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
69 €/year
Tool-free filter changeAccording to the manufacturer, filters can be changed without tools
No
Yes
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
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
Chilled waterAccording to the manufacturer, the unit chills the water before dispensing
No

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)
0.95 liters (0.25 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)
29.72 cm (12 in)
DepthDepth of the unit according to the manufacturer in cm – matters for the space under the sink
13.3 cm (5.2 in)
21.08 cm (8.3 in)
HeightHeight of the unit according to the manufacturer in cm
47 cm (19 in)
34.8 cm (14 in)
WeightWeight without water according to the manufacturer in kg
12.5 kg (28 lb)
6.2 kg (14 lb)

General

Warranty
1 years
1 years
In the box
Osmoseanlage 6-stufig, 3,2-Gallonen-Vorratstank, separater Wasserhahn mit Top-Mount-Kit, Filtergehäuseschlüssel
Gerät, C1RFG-Filter, Wassertank, Bedienungsanleitung

Prices

Offers

iSpring RCC7AK Umkehrosmose

Waterdrop C1SL

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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

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

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