What this under-sink system is built to do
- Before bringing it home, confirm you have a power outlet under the sink and enough cabinet width for the unit.
- Installing the faucet requires drilling a hole in your countertop, so measure the space before you buy.
This is a tankless reverse osmosis system for a household that wants cleaner-tasting water at the tap without giving up under-sink storage. Its 8-stage process is tested to reduce PFOA, PFOS, chlorine, lead, fluoride and heavy metals, then adds minerals like calcium, magnesium, sodium and potassium back in. If your family drinks a lot of water and you're tired of lugging jugs or waiting on a slow filter, we'd consider this one.
The 700 GPD capacity means it can fill a 6-ounce cup in about 6 seconds, so it keeps up with cooking, guests and refilling bottles. The tankless build frees up to 70% of the cabinet floor compared with a tank system, which matters in compact kitchens. It also pairs with a Waterdrop XT adapter to feed ice makers and fridges, though that connector is separate.
What this price offer means
At $289.99, this sits about $18.81 below the typical price of $308.80 for this system over the last 90 days, roughly 6% off. That is a modest discount rather than a deep one. The value here is really the 2:1 pure-to-drain ratio, which sends two cups of clean water for every one that goes down the drain. That ratio cuts waste compared with older RO systems, and fewer drain gallons can add up over a year of daily drinking.
| Offer detail | Recorded value |
|---|---|
| Amazon price | $289.99 |
| Customer rating | 4.5 |
| Customer reviews | 749 |
| Typical price over 90 days | $308.80 |
| Difference | $18.81 (6 percent) |
What to check about filters and upkeep
Replacement filters are the running cost that outlasts the purchase price, so check the current filter price and how often each stage needs changing before you commit. The listing doesn't spell out a cartridge schedule here, so confirm the recommended intervals for your water quality and usage. Also decide where wastewater drains and whether your setup can handle the 2:1 ratio. If you want fridge or ice maker water, price the XT connector separately since it isn't included with the base system.
When to skip this system
If you don't want to drill your countertop or you rent and can't modify the kitchen, this is the wrong fit because the faucet needs a hole cut for it. The tankless design also assumes you have an outlet and usable cabinet space, so a very tight or outlet-free sink base is a reason to pass. And if you want mineral-free water only, the alkaline mineralization stage here is a feature you'd be paying for without using.
Product details
| Model | WD-RG17-BAN |
|---|---|
| Color | Black |
| Size | Alkaline |
