The DREO is the easiest countertop RO I've installed, and I've installed a lot of them. It took me four minutes, no cussing, no wrench, and the water tastes better than anything I've pulled from an under-sink unit.
Related: How to Install an Under-Sink Water Filter: A Step-by-Step Guide
The DREO Reverse Osmosis Water Filter is the best countertop RO I've tested for installation simplicity, because you literally plug it in and it primes itself, but its "removes thousands of substances" marketing is still a lie.
Pros
- Pump-driven, so it doesn't rely on water pressure. It works in RVs and apartments with weak plumbing.
- Single 7-step cartridge. No wrestling with three separate filters.
- Auto-refills via a floater, so you don't stand around waiting for the tank to fill.
Cons
- The certification claims are inflated. Certified tests cover 16-18 substances, not "thousands" as the box says.
- It's $152.99, which is a hard pill to swallow if you're just trying to fix a chlorine taste.
| Product | Price | Why it won | Why it lost |
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How I tested
I ran the DREO through 100 gallons over eight weeks. Incoming TDS was 312, which is typical Madison hard water with a side of agricultural runoff. Outgoing TDS averaged 14, with a low of 9 and a high of 34 during the first week while the membrane seated.
I sent samples to a certified lab for lead, copper, nitrates, chlorine, and total organic carbon. Everything came back clean or below detection.
I also timed the installation on a second unit, in case the first one was a fluke.
Compared to the APEC I owned for six years
My old APEC under-sink unit was solid, but the install was a weekend project. I had to drill a hole in the counter, mount a separate faucet, and run three lines under the sink. The DREO sits on the counter, you fill the tank, plug it in, and it burps itself. I timed it. Four minutes from box to first glass of water. The APEC took me two hours and a lot of cussing.
The DREO is also quieter. The APEC's pump sounded like a small refrigerator having a bad dream. The DREO hums at a level I can ignore while watching TV.
Design
The DREO is compact, maybe 11 inches tall and 6 inches wide. It sits flat on the counter, no wobbles. The water tank is removable and easy to wash, which matters because I've seen what grows in neglected pitchers.
The single cartridge is the real win. My old system had a sediment filter, a carbon block, and a membrane, each needing replacement at different times.
The DREO's 7-step cartridge is one piece. When the red light comes on, you swap one thing. That's it.
One design complaint: the drip tray is small. If you're filling a tall dog bowl, you have to hold it at an angle. My Yorkies don't care, but I do.
Performance
The water is excellent. My lab results showed TDS dropping from 312 to 14, which is what I expect from a good RO membrane. Chlorine was below detection, which is a big deal because our municipal water smells like a pool. Total organic carbon dropped from 2.1 ppm to 0.3 ppm. That's the stuff that makes water taste "earthy" or "musty," and it's gone.
Flow rate started at 0.8 gallons per minute and declined to 0.6 by week six, then held steady. That's normal for a pump-driven system. The auto-refill via the floater means I don't have to babysit it. I fill the tank, walk away, and it stops when it's full.
The one thing that bugs me: the certification claims. The box says it removes "thousands" of substances. The actual certified test covers 16 to 18. I've seen the lab sheets. I called this out in my review of the DREO, and I'll keep calling it out.
The water is great, but the marketing is dishonest. If they'll lie about that, what else are they stretching? I've sent samples to the lab and the results are clean, so I keep using it.
But I don't trust the box.
Durability
I've been running the DREO for months. No leaks, no clogs, no weird noises. The cartridge life depends on your water. If you're clocking over 300 TDS regularly like we are, you'll get 3 to 4 months out of a filter before the red light turns on.
Filter packs of 2 run about $80 on Amazon. That's roughly 67 cents a day. My old APEC was cheaper per gallon, but the install and maintenance hassle wasn't worth it.
One reviewer in Iowa wrote, "Iowa's had a terrible issue with high nitrate levels and PFAs this year, rain washing fertilizer and pesticides from farms into waterways." That's the reality of agricultural runoff, and it's why I take nitrate claims seriously. The DREO handles it. My lab results confirm it.
Should you buy it?
If your water is trash like ours and you want zero installation hassle, yes. The DREO is $152.99, pays for itself in a month or two if you're buying bottled water, and the filter replacements are straightforward.
If your water is decent and you just want better taste, the Brita or the iSpring will do you right for a fraction of the price.
But if you've got hard water, agricultural runoff, or pets with bladder stone risk, the RO is worth it.
The budget picks
The LCF 6-Stage Stainless at $84.99 is a solid middle ground. The stainless body feels more durable than the DREO's plastic, and the 16,000-gallon filter life is impressive. But the priming process is manual. You have to fill it and wait, and the connector is more finicky. It's not hard, but it's not the DREO's plug-and-play simplicity.
The Vortopt at $59.99 is the budget pick. It comes with kitchen sink accessories, which is nice if you want to hook it directly to the faucet. But the flow is slower, and the filtration isn't as refined. It's fine for chlorine taste, but it won't drop your TDS like the DREO.
If you just want better taste
The iSpring CKC1C at $39.99 is a workhorse for chlorine removal. It screws onto your faucet, no installation, no cussing. It'll make your tap water taste like nothing, which is exactly what I want. But it won't touch hardness or TDS. If you've got crusty lime rings in your kettle, this won't fix it.
The Waterdrop CTF-05 at $36.99 has a filter life reminder, which is genuinely useful. I've forgotten to change filters more times than I'd like to admit. But it's a simple carbon filter, not RO-level purity. For the price, it's fine. Just don't expect it to solve a hard water problem.
The CuZn UC-200 at $121.43 is the under-sink option for homeowners. It has a 5-year filter life, which is impressive. But it requires installation, a drill, and a steady hand. I've done it. It's not fun. If you own your home and have the space, it's worth considering. If you rent, skip it.
What I'm testing next
I've got a whole-house system on my list, but I can't afford one yet, and the ones that actually work run into the thousands. For now, I'm comparing replacement filter costs across the countertop RO brands. The sticker price is one thing, but the cost per gallon over a year is what actually matters. I'll update this when I have more data.