I’ve been using reverse osmosis water purifiers at home for years—everything from countertop systems to full under-sink setups. So I was super excited to write this JIMMY Countertop RO Water Purifier R9 Pro review.
What immediately stood out? It doesn’t connect to a water line at all. And it’s such a relief. Because if you’ve ever dealt with RO installation, you know it’s rarely quick—it usually involves a technician, scheduling, and a bit of kitchen chaos.
The JIMMY Countertop RO Water Purifier R9 Pro is a portable reverse osmosis water purifier you just plug in and fill with water. No installation or plumbing drama.
And it also gives instant hot and cold water, which sounds like a small thing until you actually start using it daily.
So I had to see—does this level of convenience actually hold up in real life?
Quick First Look at the JIMMY Countertop RO Water Purifier R9 Pro
What it is (and why it’s not your usual water purifier)
Short version: the R9 Pro is a countertop reverse osmosis water purifier with a brain. And it looks like a fancy automatic espresso machine…but for water. You fill a tank, plug it in, and it pushes your tap water through a multi-stage RO system, then hands it back to you hot, cold, or room temp on demand. No drilling, no under-sink wrestling, no “the technician will arrive between 8 and 5.”
It’s built for people like, well, me: families, apartment dwellers, renters who can’t touch the plumbing, and convenience seekers who want clean water without a renovation. According to JIMMY’s official product page, it’s true plug-and-play—a 5.5L raw-water tank, two removable purified-water pitchers, and instant heating in about three seconds.
If you want the broader landscape before committing, we’ve got a whole guide on how to choose the best water purifier system for home, and this slots neatly into the “I refuse to call a plumber” category.
What’s in the box + first impressions
In the box you get the main unit, two BPA-free Tritan pitchers, the purifier cartridges, a drip tray, the power cord, and a manual you should actually read (more on that in a sec). Unboxing the product was pretty easy, but I do recommend having someone nearby to help pull the box away from the main unit. It’s packed snugly—a good thing—but an extra set of hands makes it easier. Also included: 2 packets of citric acid descaler, which is thoughtful.
First impression? It’s tall (13 2/3 inches), but it’s narrow—the body is under 9 inches deep, which is the whole pitch. It’s designed to perch on the edge of a counter or a sideboard without dominating the room. Aesthetically it leans modern-minimalist, which means it won’t fight your kitchen for attention. The build is sturdy and feels high quality—I love the shiny display!
Setup & Installation
No plumber needed—but there is a catch
Like I said earlier, there is no plumbing install here. You don’t connect it to a water line, or drill anywhere. For renters and anyone in an apartment, this alone is the headline.
But “plug-and-play” comes with an asterisk, and I’d be doing you dirty if I skipped it.
The 8–12 hour air-out step explained
So you excitedly tear open the box, ready for instant water… and the manual tells you to take the whole thing apart—top cover, raw water tank, pure water cup—and let it just sit for 8 to 12 hours before you do anything. This isn’t a tip, it’s in the official JIMMY quick-start instructions. Basically the components need to air out before first use.
So just keep in mind that this is not a “set it up at 6 p.m. and drink by dinner” situation. Plan to unbox it the night before you actually want water. I did not plan for this and learned the hard way.
First flush + getting it ready to use
After the rest period, you reassemble, fill the raw water tank, and run a flush cycle before drinking anything. It’s actually pretty easy. Just connect the power supply, and the water purification indicator will light up, letting you know that it’s working. When the water purification light goes out, the water purification is finished. Turn on the water cooling function by pressing the button for 5 seconds to reach at least one cell. Then, drain the pure water cup.
Repeat the process 3–5 times. Because I’m a scientist’s daughter, I went for the full 5 flushes.
Living With It Day to Day
How it fits into a real kitchen (not a showroom)
On Instagram, every kitchen is a sunlit cathedral with three items on the counter. Mine, on the other hand, is a display case for our gadgets. Yep, we’ve got two toasters (don’t ask), a rice cooker, an air fryer, an espresso machine, a coffee machine… suffice it to say that there’s approximately one square foot of free space. So, does the R9 Pro fit a cluttered, lived-in kitchen?
Mostly, yes—because it’s narrow rather than wide. It eats vertical space, not horizontal, so it tucks into a corner better than a chunky pitcher-style system would. In the end, I decided to set this up in the hallway between our bedrooms. Now, the kids don’t have to trek to the kitchen for a drink of water if they wake up thirsty at 2 am.
And you know what? I actually wish I’d had this setup when the kids were babies—because there’s a specific temperature setting for formula. If the baby wakes up hungry, you can prep a bottle right outside their room without going downstairs.
The touchscreen + TDS display—useful or just tech fluff?
The smart touchscreen shows your TDS reading and purifier status, and I went in fully prepared to call this gimmicky. I came out… mildly obsessed. Watching the number is weirdly satisfying.
Quick reality check so you read it correctly, though: TDS (total dissolved solids) is a measure of dissolved minerals and salts, and per the World Health Organization, it’s mostly an aesthetic/taste indicator. JIMMY says that the R9 Pro also removes 99% of heavy metals, bacteria, and microplastics from drinking water—a relief for pretty much everyone, but especially families.
Daily routines: mornings, meals, and everything in between
Mornings. Coffee is where this thing won me over. Hot water in seconds means no kettle, no waiting, no standing there like it’s 1995. My favorite setting was the 75°C/165°F—perfect for my morning pour-over.
Family use. For bottles, cups, and the endless “I’m thirsty” requests, having cold water on tap without a fridge dispenser was genuinely handy. The two pitchers mean someone can refill at the table while the unit keeps purifying.
General workflow. Filling the tank becomes a small habit, like loading the coffee machine. Once it’s part of the rhythm, you stop thinking about it. The 3-second heat claim is the thing that keeps it from feeling like a chore. This is the section where the R9 Pro stops being a gadget and just becomes “the water thing on the counter.”
The Hot & Cold Water Feature Is the Real Flex
Instant cold water that actually feels refreshing
Cold sits around 10–15°C per JIMMY’s specs—not ice-bath cold, but properly refreshing, especially post-school-run or post-workout.
On a hot-ish (90°F/33°C) day, it was a great way to hydrate and stay cool during work. My home office opens to the same hallway where I set up the R9 Pro, so cool, refreshing water was right outside my door. I, finally, had no excuse not to drink water.
Hot water on demand for coffee, tea, and everything else
JIMMY lists six hot presets—from a gentle 45°C up to a near-boiling 98°C—plus a room-temperature option. That means green tea gets its lower temp, black coffee gets the hot stuff, and you’re not babysitting a kettle. If you make formula, having dialed-in warm water instantly is convenient, but I’d genuinely defer to your pediatrician and the formula maker’s prep instructions on exact temperatures rather than my review.
Is it actually “instant,” or just marketing talk?
The “3-second” claim refers to the heating, and in my experience it’s quite accurate. You’re not waiting on a boil. The water volume options (up to four settings, from small pours to a 500ml fill) mean a mug fills fast. It feels instant in the way that matters: faster than a kettle, every single time.
What the Water Actually Tastes Like (and Why It Matters)
7-stage RO filtration in real life
The R9 Pro runs water through a 7-stage RO system with a 0.0001-micron membrane, which removes up to 99.99% of contaminants, including bacteria, PFAS, heavy metals, and chlorine, then remineralizes for taste. I’ll be straight with you: I can’t personally verify that percentage in my kitchen—that’s a manufacturer claim backed by their lab testing, and I’d want third-party certification (look for NSF/ANSI) to take any number to the bank.
What I can tell you is why this matters. The EPA is blunt that there’s no safe level of lead exposure, and lead usually enters water through old corroding plumbing—not the source—which is exactly the kind of thing renters can’t see or fix. RO is one of the more thorough at-home approaches to that category of contaminant.
Continuous UV sterillization
Here’s the detail that sold me, though: there’s continuous UV sterilization inside the pure water cup and the cold water tank. That solves a problem nobody loves to think about with countertop systems—water just sitting in a tank can become a breeding ground for bacteria over time.
The continuous UV treatment means what comes out of the spout stays as clean as what the RO membrane produced in the first place, not whatever’s been hanging out in storage. It’s the kind of behind-the-scenes feature you’ll never see working, which is exactly why you should know it’s there.
Tap vs purified vs bottled—what I noticed
Taste-wise, the purified water was noticeably cleaner than my tap—less of that faint chlorine edge. The remineralization step keeps it from tasting flat and weirdly “empty,” which is the usual knock on RO water.
I’m no tasting expert, but I’d call the flavor sweet and crisp. It’s lovely and refreshing in the mouth, with no weird aftertaste. My 7-year-old called it “yummy,” and my 4th grader said she’d fill her water bottle with it.
Those are kid-issued seals of approval, my friends!
Does the TDS reading actually change anything?
Practically? It changed my behavior more than my water. Seeing the before/after made me actually trust the thing and reach for it instead of the tap.
Design, Pitchers & Everyday Convenience
Does it actually fit on your counter?
The under-9-inch depth is the real win—it fits where wide units can’t. It is tall, so if you’ve got low-hanging cabinets, measure first.
At first, I thought that two pitchers were a little extra. But here they’re actually the sleeper feature. You can fill one, stick it in the fridge for cold water, and keep the unit purifying—so you’ve effectively got water in two places at once. They’re made from BPA-free Tritan, which is cleared by the FDA for repeated food contact and is free of BPA and other bisphenols.
Fridge, refills, and real-world practicality
The pitcher-in-the-fridge trick fixed my one gripe with cold water (it’s chilled, not freezing). Refilling the tank is easy, pouring is easy, and the whole appliance runs quietly. I really don’t notice any sound while it’s purifiying.
The Eco Side of Things
How this replaces bottled water in daily life
JIMMY says you can save up to 3,600 plastic bottles a year versus bottled water with the R9 Pro. I can’t audit that exact figure, but the direction is real: bottled water has a rough recycling story. Per the EPA, PET bottles were recycled at only about 29% as of its most recent figures—meaning the large majority end up landfilled or burned. Every fill from a countertop unit is one you didn’t buy and toss—especially if your tap water is of dubious quality.
What I Loved
- The no-installation thing. No technician, no drilling, no scheduling a Tuesday around a plumber. Plug it in, fill it, done.
- Hot and cold on demand fixed my mornings. Coffee in seconds with no kettle, cold water for the kids without a fridge line—this is the feature I’d miss most if it disappeared.
- The two Tritan pitchers are a sleeper hit. Stash one in the fridge for cold water while the unit keeps purifying. Water in two places at once is a small luxury that adds up.
- The filtration does the heavy lifting. The 7-stage system removes 99%+ of the stuff you worry about—lead, chlorine, PFAS, heavy metals, and bacteria.
What I Didn’t
Honestly? Not much, and nothing that’d stop me recommending it. The one thing to know going in is the first-day wait: it needs an 8–12 hour air-out plus a flush before your first pour, so unbox it the night before. It’s also a tall unit (narrow, but tall), so give your cabinet clearance a quick glance before you fall in love.
The only upkeep worth a mention: if it sits unused for more than 24 hours, just run the water for about 5 seconds before drinking to keep that first pour fresh. Takes a second—then you’re right back to plug-and-pour.
Final Verdict: Who This Is Actually For
Who will love the JIMMY Countertop RO Water Purifier R9 Pro
- Families who want hot, cold, and pure water without a fridge line or a kettle.
- Renters and apartment dwellers who legally/physically can’t alter the plumbing.
- Anyone who wants to avoid installation—no technician, no drilling, no scheduling.
- Coffee and tea people who want specific temperatures on demand.
Who should probably skip it
- People who want a true under-sink “set it and forget it” system with no refilling.
- Kitchens with very limited vertical clearance (it’s tall) or zero free counter space.
- Strict tap-water-only drinkers who won’t notice enough taste difference to justify the cost.
My honest take after testing it
Would I keep it? Yeah—mostly for the hot-and-cold-on-demand combo, which quietly rewired my morning routine. Would I recommend it? For the convenience-first crowd, absolutely.
It’s not pretending to be a permanent plumbed system; it wants to be the easiest possible clean-water setup, and on that promise, the JIMMY Countertop RO Water Purifier R9 Pro delivers. If you came here wanting permission to skip the plumber, consider it granted.
For more on the original model, see our earlier JIMMY R9 Countertop RO Water Purifier review.
