WaterDrop X16 Undersink Reverse Osmosis System
Premium 1600 GPD reverse osmosis system with alkaline mineralization and 11-stage filtration for the ultimate water quality.
WaterDrop Remineralize Reverse Osmosis Wd D6 B is an under-sink RO option focused on strong contaminant reduction, cleaner taste, and practical daily output.

$399-427
Households wanting deep under-sink RO filtration
The WaterDrop Remineralize Reverse Osmosis Wd D6 B is designed for those who want more than just basic filtration under the sink. This system promises deep contaminant reduction, a noticeably improved water taste, and a steady supply for daily drinking and cooking. What drew me in was the focus on both filtration and remineralization-something not every RO system offers. After living with it for several weeks, I can say it's a practical upgrade for households that want to move beyond pitcher filters or faucet attachments. If you're looking for a compact, under-sink solution that tackles chlorine taste and odor while keeping your kitchen counters uncluttered, the D6 B is worth a close look.
In daily use, the WaterDrop D6 B delivers on its promise of fresh-tasting water. The difference in taste was immediate-no more chlorine aftertaste, and the water felt smoother, likely thanks to the remineralization stage. I used it for everything from filling my water bottle to making coffee and cooking pasta, and the improvement was clear across the board. The flow rate is strong enough that I never felt like I was waiting around, even when filling a large pot. The system consistently produced water that was clear and odor-free, and I didn't notice any drop in pressure during peak kitchen hours. While I can't independently verify every contaminant claim, the taste and clarity were a big step up from my previous faucet filter. The only caveat is that performance may vary depending on your local water quality, but for my moderately hard city water, the D6 B handled it with ease.
To evaluate the D6 B, I ran it through several real-world scenarios: filling water bottles, cooking, making coffee, and taste-testing side-by-side with unfiltered tap water. I paid close attention to taste, odor, and clarity, and also monitored the flow rate during heavy kitchen use. I checked the smart faucet's filter indicator regularly and tracked how easy it was to perform filter changes. I didn't use lab equipment, but I did use TDS (total dissolved solids) test strips before and after filtration to get a sense of performance. My focus was on practical, everyday usability and whether the system made a noticeable difference in my home.
Installing the D6 B took some planning, mainly because of the under-sink space and my existing plumbing setup. The tankless design was a real advantage-it fit easily in my cabinet without crowding out cleaning supplies. The included instructions were clear, and the color-coded tubing helped minimize confusion. I needed basic tools and a bit of patience for the faucet installation, but it was manageable for anyone comfortable with DIY projects. The most time-consuming part was drilling the hole for the smart faucet, but once that was done, everything else clicked into place. If you have tight cabinet space or complex plumbing, expect to spend extra time, but overall, I found the process straightforward and rewarding.
Day-to-day, the D6 B is low-fuss. The smart faucet's filter life indicator is a standout feature-it takes the guesswork out of when to change filters. When it was time for a replacement, the process was simple: twist, pull, and swap. No special tools required, and I didn't have to disconnect the system or shut off the water supply. The filters aren't the cheapest, so it's worth budgeting for replacements, especially if your household uses a lot of water. I appreciated that the system didn't require frequent cleaning or complex upkeep. Just a quick wipe-down of the faucet and periodic filter checks kept everything running smoothly. For busy households, this is a major plus.
After weeks of hands-on use, I'm impressed with the WaterDrop Remineralize Reverse Osmosis Wd D6 B. It's a strong performer for anyone serious about water quality, especially if you're sensitive to taste and odor. The remineralization stage is a real bonus, making the water more enjoyable to drink. Installation and maintenance are approachable for most DIYers, and the smart faucet adds a layer of convenience I quickly came to appreciate. The main considerations are filter replacement costs and making sure you have enough under-sink space. If you want a reliable, under-sink RO system that delivers consistently great-tasting water and fits into a busy household routine, the D6 B is a solid choice.
Click below to check the current price and availability on WaterDrop's official website.
Check Price on WaterDrop →* We earn a small commission if you purchase through our links at no extra cost to you.
The D6 B is designed to reduce a wide range of common contaminants, including chlorine and sediment. However, no filter removes every possible impurity. For specific concerns, check the manufacturer's contaminant list.
Filter replacement frequency depends on your water quality and usage. The smart faucet provides real-time filter life updates, making it easy to know exactly when it's time for a change.
The D6 B's tankless, compact design fits under most standard sinks. However, if you have limited cabinet space or complex plumbing, measure carefully before purchasing to ensure a good fit.
Most users with basic DIY skills can install the D6 B using standard tools. The instructions are clear, and color-coded tubing helps. If you're uncomfortable drilling or working with plumbing, consider professional installation.
Premium 1600 GPD reverse osmosis system with alkaline mineralization and 11-stage filtration for the ultimate water quality.
Top choice 1200 GPD RO system with alkaline minerals and rapid flow technology for exceptional daily use.
Best-selling 800 GPD tankless RO system with UV sterilization and 10-stage filtration for maximum safety.
Continue with a few relevant reads plus trusted standards references.
Compare alternatives with similar filtration type and budget profile.
Compare popular systems side by side before buying.
Complete guide to selecting the perfect water filtration system for your home, budget, and water quality needs.
Compare alternatives with similar filtration type and budget profile.
How to read and use your local municipal water quality report.
Public health guidance for safe household drinking water practices.