Waterdrop M6SL Countertop Mineral Reverse Osmosis System
- Capacity: 1.1 gallons
- Purification Method: Reverse Osmosis
- Installation Type: Countertop
- Supported Water Tds Level Maximum Ppm: 300
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A countertop reverse osmosis system with a 4 liter reserve, a straightforward no-plumbing option for a kitchen counter.
As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.
ASIN: B0GRZF389RModel: WD-M6SLCategory: Water Filtration Systems
Overview
Countertop reverse osmosis filtration system from Waterdrop with a 4 liter reserve, measuring 15.9 x 9.3 x 14.5 inches, sized for a kitchen counter rather than an under-sink install.
Confirmed as a countertop install, the WD-M6SL sits close in size to Waterdrop's WD-A2G but with a slightly smaller 4 liter reserve and a shorter 14.5 in height. That makes it a defined counter-space unit rather than one needing under-sink plumbing access.
- Reverse osmosis purification
- 4 liter capacity
- Countertop install
- 15.9 x 9.3 x 14.5 in
Who it's for
Suits kitchens wanting reverse osmosis filtration on the counter with a multi-liter reserve and no plumbing work. Less suited to buyers wanting the larger reserve of Waterdrop's WD-A2G model.
Pros and cons
- Confirmed countertop install
- 4 liter standing reserve
- Reverse osmosis purification
- Smaller reserve than the WD-A2G in the same lineup
- No plumbing connection for continuous supply
Performance notes
The 4 liter reserve provides a standing supply of filtered water without tankless flow-rate limits, refilled as needed from the countertop unit. Its 14.5 in height and defined countertop install type make placement straightforward compared to systems with unspecified install location.
Specifications
| Brand | Waterdrop |
|---|---|
| Model | WD-M6SL |
| Dimensions & fit | |
| Item Dimensions L X W X H | 15.9 × 9.3 × 14.5 inches |
| Capacity & performance | |
| Capacity | 1.1 gallonslower than 87% of 46 water filtration systems |
| Filter Life Cycle | 12 months |
| Power & efficiency | |
| Power Source | Corded Electric |
| Construction & materials | |
| Material Type | Reverse Osmosis Membrane & Carbon Block & PP Cotton |
| Compatibility & installation | |
| Installation Type | Countertop |
| Included components | |
| Unit Count | 1 |
| Number Of Packs | 1 |
| Included Components | M6SL RO System (with 1 Pre-Installed Filter), User Manual |
| Warranty & support | |
| Supported Water Tds Level Maximum Ppm | 300 |
| Other details | |
| Purification Method | Reverse Osmosis |
| Container Type | Dispenser |
| Number Of Items | 1 |
| Other Special Features Of The Product | Mineral Countertop RO with Glass Pitcher, 8-Stage, 3:1 Pure to Drain, Water Tank Capacity: 185 oz (135 oz for tap water / 50 oz for wastewater), Certified to NSF/ANSI 58 & NSF/ANSI/CAN 372 |
| Part Number | WD-M6SL |
| Item Highlight | Glass Pitcher, NSF/ANSI 58 Certified, 8-Stage RO Filtration System, Reduce PFAS/TDS, 3:1 Pure To Drain, Installation-Free |
Closest rivals on specs
iSpring UVF11A Water Filtration System- Capacity 1.1 vs 1 gallons (+10%)
Apec Water ROCT-C1 Water Filtration System- Capacity 1.1 vs 1.3 gallons (-15%)
Berkey BER-TU2+BER-PF2 Water Filtration System- Capacity 1.1 vs 1.5 gallons (-27%)
Frequently asked questions
Where does the Waterdrop WD-M6SL install?
On the countertop, no plumbing modification needed.
How much water does it hold?
A 4 liter reserve.
How does it compare to the Waterdrop WD-A2G?
The WD-M6SL is a countertop-confirmed unit with a slightly smaller 4 liter reserve versus the WD-A2G's 4.7 liters.