JIMMY R9 Pro Countertop Reverse Osmosis Water Filter Review
The JIMMY R9 Pro is a countertop reverse osmosis water filter with instant hot, cold, and room temp water. Here's what it's like to live with.
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Quick Verdict
One box, hot at 208°F, cold at 50°F, and reverse osmosis water in about three seconds without touching a wrench. The trade-off: it claims counter real estate and fills pitchers slower than a faucet, but for renters who need instant hot water and clean drinking water without a plumber, this does both from one plug.
Buy if you:
- Rent or can’t drill into plumbing for an under-sink RO system
- Want coffee-hot and fridge-cold water from the same tap
- Make baby formula and want the right temp on demand
- Are trying to quit buying cases of bottled water
Skip if you:
- Have zero spare counter space, this thing has a real footprint
- Need high-volume water fast, RO filtering takes its time
- Already have a plumbed RO system you’re happy with
| Filtration | 7-stage RO, 0.0001 μm membrane + UV |
|---|---|
| Hot presets | 6 settings, 113°F to 208°F |
| Cold range | 50°F to 59°F (plus ambient) |
| Raw water tank | 1.45 gallon, fill and plug in |
| Pitchers | 2 removable 1L Tritan, BPA-free |
| Filter life | Pre-filters 12 mo, RO membrane 24 mo |
One Machine Doing Three Jobs on My Counter
A countertop box that replaces my kettle, my Brita, and my ice tray all at once turned out to be the thing I didn’t know I needed as a renter. The JIMMY R9 Pro countertop reverse osmosis water filter is built around exactly that idea. It pushes tap water through a seven-stage reverse osmosis system, then serves it back to you hot, cold, or room temperature depending on which button you tap. No plumber, no drilling, no cabinet full of tubing. You fill a tank, plug it in, and it goes.
That’s the pitch, anyway. What sold me on trying it was the “no installation” part. I’ve talked myself out of under-sink RO systems more than once because I rent and I don’t want to fight my landlord over a saddle valve. This one just sits there.
What the Reverse Osmosis System Actually Does
The headline number is 0.0001 μm. That’s the pore size of the RO membrane, and it’s the reason this thing claims to knock out over 99% of lead, chlorine, nitrates, and PFAS. Seven filtration stages sit in front of and behind that membrane, and there’s a UV-treated interior on the Tritan tanks to keep things clean between fills.
On the temperature side you get six hot presets ranging from 113°F all the way up to 208°F, so you can hit lukewarm for formula or near-boiling for pour-over coffee. Cold sits between 50°F and 59°F, and there’s an ambient option if you just want plain room-temp water. The listing says the target temperature is ready in about three seconds, which is the part that changes how often you reach for it.
Living With It Day to Day
The touchscreen runs the whole show, and it’s the part you interact with most. You pick your temperature, pick your dispense volume, and it does the rest. The lit water outlet turns out to be smarter than it sounds when you’re filling a glass at 6am without flipping on the kitchen lights.
The two removable 1-liter pitchers are the sleeper feature. One lives in the fridge staying cold, the other stays out for whoever’s at the table. When one runs dry you swap it and refill, so you’re not standing there waiting for the machine to catch up. And that smart TDS reading gives you an actual number for how clean the output is, which scratches the same itch as watching a soil moisture meter drop. You can see it working.
The child lock matters if you have little hands in the house. A 208°F dispenser is the same temperature as water just off a rolling boil, one curious grab is a trip to urgent care. Turn it on before the first dispense, not after.
It’s Big, and It’s Not Fast
Reverse osmosis is slow by nature, and this machine doesn’t cheat physics. The description says it straight up: this is not the smallest or fastest filter you can buy. That’s the trade you make for skipping the plumbing. If you’re trying to fill a big stock pot in a hurry, you’ll be feeding it in pitcher-sized batches, not blasting a faucet.
The footprint is the other thing to plan for. A 1.45-gallon raw tank plus the heating and cooling hardware means this is a real countertop appliance, not a slim pitcher you tuck by the sink. Measure your counter before you commit. If your kitchen is already tight, this is going to claim a corner and keep it.
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JIMMY R9 Pro Countertop RO Purifier
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Who This Fits Best
The sharpest use case is a renter making baby formula at 2am, filtered water at the right temperature without a kettle, a thermometer, or a landlord’s permission. After that it’s pour-over coffee people who want 208°F on tap, and anyone currently hauling cases of bottled water up a flight of stairs. If none of those describe you, the trade-offs get harder to justify.
Offices are a quiet fit too. Two pitchers plus hot and cold from one box beats a water cooler and a separate kettle fighting over the break room outlet.
Countertop RO vs. an Under-Sink System
An under-sink RO system wins on volume and disappears from view, and that’s the trade-off here. If you own your home and don’t mind a plumber, a plumbed system gives you unlimited on-demand water and hides in the cabinet. What it won’t do is give you six hot presets and instant cold from the same spout, and it definitely won’t follow you when you move. The R9 Pro trades tank refills and counter space for zero installation and three water temperatures in one place. Pick based on whether you’d rather feed a tank or call a plumber.
Tips If You Buy One
Put it near an outlet and a spot where refilling the 1.45-gallon tank is easy, because you’ll be doing it regularly. Keep one pitcher in the fridge from day one so you always have cold backup while the machine catches up. Turn the child lock on before you ever dispense hot, not after. And track your filter clock: the pre-filters run about 12 months, the RO membrane about 24, so budget for replacements as part of the cost, not a surprise.
Pros
- Real 7-stage reverse osmosis with a 0.0001 μm membrane, no plumbing needed
- Hot (up to 208°F), cold (50°F), and ambient from one machine in about 3 seconds
- Two removable 1L pitchers so you can keep one chilled and one in use
- TDS readout, child lock, and a lit outlet are thoughtful daily touches
- Long filter life, 12 months on pre-filters and 24 on the membrane
Cons
- Big footprint, this is a real appliance not a slim pitcher
- RO filtering is slow, not built for filling large pots quickly
- You have to refill the raw tank by hand instead of tapping a line
- Replacement filters are an ongoing cost to plan for
Frequently Asked Questions
Does the JIMMY R9 Pro need any plumbing or installation?
No. It’s fully plug-and-play. You fill the 1.45-gallon raw water tank by hand and plug the unit into a standard outlet. There’s no drilling, no saddle valve, and nothing to connect to your sink.
Is the water safe for making baby formula?
Yes, that’s one of its intended uses. The six hot presets start at 113°F, which is a formula-friendly range, and the reverse osmosis system reduces over 99% of lead, chlorine, and other impurities. You get the right temp and clean water without boiling and waiting.
How often do the filters need replacing?
The two pre-filters (M2S and Q2S) are rated for about 12 months each, and the RO membrane runs about 24 months. Replacement cycles adapt to your water quality and how much you use it, so rougher tap water may shorten those windows.
Does it require an app, account, or subscription?
No. Everything runs off the built-in touchscreen. There’s no app to sign into and no subscription to keep it working. Your only ongoing cost is replacement filters.
Can it make ice or replace a cold water dispenser?
It chills water to between 50°F and 59°F without needing ice, but it does not make ice cubes. If you want cold water on demand, it handles that. If you need actual ice, you’ll still need a separate maker.
How much counter space does it take up?
Enough that you should measure first. Between the 1.45-gallon tank and the heating and cooling hardware, it’s a full-size countertop appliance. The maker openly says it isn’t the smallest filter out there, so plan a dedicated spot rather than squeezing it between other gear.
Is it noisy when heating or cooling?
The listing claims quiet operation, but the cooling system does run an audible cycle, think small refrigerator compressor, not a blender. It’s not something you’d notice from the next room, but it will click on periodically if the machine is sitting near where you sleep or work.
Can I move it between home and office?
Yes. Because there’s no plumbing, it’s portable in the sense that you can unplug it, empty the tanks, and set it up somewhere else. It’s heavy and bulky though, so this is more “move it to a new place” than “carry it around daily.”
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Get it now
JIMMY R9 Pro Countertop RO Purifier
Get the best price on Amazon →As an Amazon Associate I earn from qualifying purchases.
