Waterdrop C2SL Countertop Reverse Osmosis Filter
- 7-stage RO with 0.0001 micrometer membrane
- 3:1 pure-to-drain ratio
- 108 oz feed tank, autofills a 40 oz glass pitcher
- Up to 528 gallons or 12 months per filter
- 500 ppm maximum supported TDS
- Mineral filter adds calcium, magnesium, potassium, sodium
- NSF/ANSI/CAN 372 lead-free materials
Last refreshed Sep 11, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A no-plumbing countertop RO that autofills a glass pitcher and adds minerals back for taste. Sized for a household of one or two, so bigger families will refill the feed tank often.
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ASIN: B0GX9JG1R2Model: C2SLCategory: Undersink & Countertop Water Filters
Overview
Filling the feed tank and plugging it in is all the setup this Waterdrop countertop RO needs. It pushes water through a reverse osmosis membrane and a mineral filter, then autofills a detachable glass pitcher that fits in the fridge.
Reverse osmosis without plumbing suits renters, and the remineralizing stage avoids the flat taste of RO water. Voice alerts flag a low tank or a filter change. Capacity suits a small household.
Who it's for
Apartments and small kitchens with one or two people drinking filtered water suit the countertop design. Large households will find the manual feed tank refills tedious.
Pros and cons
- No plumbing or drilling
- Adds minerals back for taste
- Glass pitcher fits in the fridge
- Voice alerts for tank and filter
- Feed tank refilled by hand
- Sized for one or two people
- Takes counter space and an outlet
Performance notes
Filtration speed and filter life depend on incoming water quality, since higher TDS loads the membrane faster. The pump drives water through the membrane, so it needs power. Mineral dosing raises taste while RO strips most dissolved solids.
Specifications
| Brand | Waterdrop |
|---|---|
| Model | C2SL |
| Dimensions & fit | |
| Item Dimensions L X W X H | 15.8 x 6.1 x 11.4 inches |
| Capacity & performance | |
| Capacity | 108 oz feed tank, 40 oz glass pitcher |
| Maximum Flow Rate | 284 liters per day |
| Filter Life Cycle | Up to 528 gallons or 12 months |
| Lowertemperature Range | 41 F |
| Upper Temperature Rating | 100 F |
| Power & efficiency | |
| Power Source | Corded Electric, 110-120 volts |
| Construction & materials | |
| Material Type | BPA-Free |
| Compatibility & installation | |
| Installation Type | Countertop, no plumbing |
| Included components | |
| Included Components | C2SL RO System with 1 pre-installed filter, User Manual |
| Warranty & support | |
| Warranty Description | 1 year |
| Supported Water Tds Level Maximum Ppm | 500 |
| Other details | |
| Purification Method | Reverse Osmosis, 7-stage |
| External Testing Certification | NSF/ANSI/CAN 372 |
| Pure to drain ratio | 3:1 |
| Container Type | Dispenser |
| Other Special Features Of The Product | Portable |
Frequently asked questions
Will the Waterdrop C2SL handle hard or high TDS water?
It supports a maximum TDS of 500 ppm. Filter life may be shorter with poorer water quality.
Does the Waterdrop C2SL need plumbing?
No. Fill the 108 oz feed water tank and plug it in.
What does it reduce?
SGS lab testing lists 99.8% of PFOA, 99.7% of PFOS, 99.96% of microplastics, 99.83% of lead, 99.51% of chlorine and 98.45% of fluoride.
How often does the filter need changing?
Up to 528 gallons or 12 months, and the display and voice alerts tell you when.