5-stage reverse osmosis that adds minerals back and raises pH for clean, great-tasting alkaline water — installs on your kitchen faucet in under 60 seconds, no plumber required.
5-Stage Premium Alkaline Countertop Reverse Osmosis
This 5-Stage Premium Alkaline Reverse Osmosis System connects directly to your kitchen faucet and requires no plumber, no permanent installation, and no tools. It’s an ideal portable water purification solution for apartments, homes, RVs, aquariums, and travel — assembled in-house in California and sold under the MyWaterClub brand.
Reverse osmosis first strips your tap water down to near-pure, then the final alkaline mineral stage adds beneficial minerals back and gently raises the pH. The result is clean, smooth, great-tasting alkaline drinking water — the mineral content gives it a rounder taste and mouthfeel than the flat taste of straight RO water.
Note: the alkaline stage is designed to improve taste and add minerals. We describe it in those terms and don’t make health claims about alkaline water.
The 5 filtration stages
Stage 1 — Sediment
5 Micron Sediment Filter
Reduces dust, sand, rust, and suspended particles — protecting downstream filters and extending membrane life.
Stage 2 — Carbon
Coconut Shell Carbon (T28)
Reduces chlorine, taste and odor, VOCs, and many common organic chemicals before the water reaches the membrane.
Stage 3 — RO Membrane
TFC Reverse Osmosis Membrane
High-rejection membrane reduces a wide range of dissolved solids and contaminants, including heavy metals, arsenic, fluoride, and lead.
Stage 4 — Polish
Post-Carbon Filter (T33)
Final carbon polishing stage removes any remaining trace taste or odor before the mineral stage.
Stage 5 — Alkaline
Alkaline Mineral Filter
Adds beneficial minerals back and gently raises the pH to produce alkaline drinking water with improved taste and mouthfeel.
Choose your membrane: 100 or 150 GPD
100 GPD Membrane
Standard production rate with balanced efficiency.
150 GPD Membrane
Higher output for faster water production and increased daily demand.
Both membrane options deliver the same purification quality and the same alkaline mineral finish. Higher-GPD membranes produce water faster; actual performance depends on your water pressure and temperature.
Key features
- ✓Produces clean, great-tasting alkaline water
- ✓Installs in under 60 seconds — no plumbing work or permanent fixtures
- ✓Advanced 5-stage filtration removes or reduces over 200 contaminants
- ✓Alkaline filter adds beneficial minerals and balances pH
- ✓Reduces a wide range of dissolved contaminants — chlorine, chloramines, VOCs, pesticides, and heavy metals
- ✓Fluoride reduction: approximately 90–95%
- ✓Operating cost approximately $0.11–$0.14 per gallon
- ✓Produces about 3–5 gallons per hour
- ✓Supports multiple faucet connection types
- ✓Designed and assembled in the USA (California)
- ✓30-day satisfaction guarantee
About bacteria & microorganisms
Because reverse osmosis filters by size exclusion at the membrane, it also reduces many particles down into the size range of bacteria and cysts. Important: this system is not a certified microbiological purifier. Do not use it to make water that isn’t already microbiologically safe safe to drink — if you’re on an untested well or under a boil-water advisory, treat your water accordingly first.
Specifications
| System type |
Countertop / faucet-connect reverse osmosis (alkaline) |
| Stages |
5 (Sediment · T28 Carbon · RO Membrane · T33 Post-Carbon · Alkaline Mineral) |
| Final stage |
Alkaline mineral filter (adds minerals, raises pH) |
| Membrane options |
100 GPD or 150 GPD (TFC) |
| Filtration accuracy |
~0.0005 microns (membrane) |
| Water production |
~3–5 gallons per hour (drip-style) |
| Service life |
Filters ~12 months (varies with water quality & usage) |
| Operating cost |
~$0.11–$0.14 per gallon |
| Product dimensions |
14 × 6 × 6 in |
| Weight |
~5.5 lbs |
| Assembly |
Assembled in the USA (California) |
| Brand |
MyWaterClub |
| SKU |
CRO5AT-100 |
What to expect day to day
- RO is a slow, drip-style process — not a continuous high-flow tap. It produces roughly 1 gallon every 11–24 minutes depending on membrane size, pressure, and temperature.
- Water production runs about 3–5 gallons per hour. We recommend collecting purified water in advance so you always have a steady supply on hand.
- Note on TDS readings: because the alkaline stage adds minerals back into the water, a TDS meter will read higher than it would after a straight RO or ultra-pure system. That’s expected — the added minerals are intentional and are what give alkaline water its taste. A higher TDS number here does not mean the system is underperforming.
Typical RO membrane rejection rates
| Contaminant |
Typical % reduced |
Contaminant |
Typical % reduced |
| Arsenic |
93–96% |
Lead |
95–98% |
| Aluminum |
86–90% |
Phosphate |
94–98% |
| Bicarbonate |
90% |
Magnesium |
94–98% |
| Cyanide |
85–93% |
Fluoride |
90–95% |
| Chloride |
85–92% |
Nickel |
96–98% |
| Calcium |
94–98% |
Cadmium |
94–98% |
| Sodium |
86.5–93% |
Detergent |
97–99% |
| Sulfate |
96–98% |
Herbicides |
97–98% |
| Potassium |
84–95% |
Insecticides |
97–98% |
| Barium |
95–98% |
Strontium |
96% |
| Iron |
94–98% |
Mercury |
94–98% |
| Zinc |
95–98% |
Selenium |
94–96% |
| Copper |
96–98% |
Silver |
93–95% |
| Ammonium |
80–90% |
Bromide |
90–95% |
| Silica |
90–98% |
Chromate |
85–95% |
| Detergent |
97–99% |
Herbicides |
97–98% |
| Insecticides |
97–98% |
Radioactivity |
93–94% |
| Nitrate |
60–76% |
Boron |
50–70% |
| Bacteria |
98–99% |
Virus |
99% |
Rejection rates are typical ranges for RO membrane technology and vary with water chemistry, pressure, temperature, and membrane condition. See the note above regarding microbiological performance — this system is not a certified microbiological purifier.
Connection options
Connect the system with the included kitchen-faucet adapter, or choose the adapter that matches your setup:
- Kitchen faucet adapter (standard, included)
- Pull-down or spray kitchen faucet adapter
- Bathroom faucet adapter (male or female)
- Garden or laundry hose connection (indoor or outdoor)
- Shower arm adapter
- Handheld shower adapter
Routine filter replacement
Filters are service components and must be replaced as part of normal maintenance to keep the system delivering consistent water quality:
Actual filter life varies with water quality, usage, and incoming TDS levels.
Recommended accessory
Inline Mechanical Shut-Off Timer
Highly recommended with any countertop RO system. It automatically stops the water after a preset time — fill containers without worrying about overflows. Prevents spills, perfect for unattended or overnight filling, and needs no electricity or batteries.
View Inline Shut-Off Timer →
Please note: Reduction performance and filter life depend on your water chemistry, pressure, and usage, so results vary from home to home. This product is not certified to treat water of unknown quality and is not a substitute for testing your water. Descriptions use general, qualified language and are not health claims. When in doubt, test your water or ask us and we’ll help you choose the right system.
Amanda Byrd –
I ordered this off Amazon and it’s been great so far I love it! It took the salt out of my well water and my water taste excellant! Please keep making filters cause I will be ordering more in future! I ordered 2 one for me and one for my parents and I already ordered one set filters for when these are ready to change I love this ro!!!
Max –
Worth every penny! I have purchased two of these systems so far, and they have saved me so much money compared with buying bottled water. Water tastes very clean and fresh, and the filters last our household about a year and half. We use the filtered water for drinking, cooking, and even washing fruits and vegetables. Because it takes some time to fill a large container, I usually fill our water dispenser at night so it is ready for the next day. Just be sure to keep an eye on it while it is filling. This has been one of the best purchases I have made. We are saving a lot of money on water, and I am very happy with the quality