A clear counter
Keep your filter below the sink and leave the counter free for daily prep.
EPA-Registered Facility
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30-Day Return
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12-Month Limited Warranty
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M8-2 Compact Under Sink Water Filter for Kitchens and RVs
M8-2 Compact Under Sink Water Filter for Kitchens and RVs
Under Sink
No Electricity
Keep Your Faucet
1–8
Regular price
$140.08 USD
Regular price
$243.00 USD
Sale price
$140.08 USD
Quantity
Couldn't load pickup availability
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Free Shipping
-
30-Day Return
-
12-Month Limited Warranty
-
Tested Before Shipping
Product description
Product description
Keep your countertop clear with a compact water filter installed under the sink. It connects to a compatible cold-water line and uses your existing faucet. No new faucet hole needed.
- Three stage filtration. PP cotton, activated carbon and an ultrafiltration membrane.
- Powered by water pressure. No electrical outlet required.
- Check your fit. Confirm under-sink space, water pressure and connection sizes before ordering by reading the specifications.
No Electricity Required
No Electricity Required
M8-2 connects to the cold-water line under your sink and filters water for your existing kitchen faucet. It runs on water pressure, so there’s no power cord or outlet to plan around. If you fasten it to the cabinet, use the bracket near the top of the filter.
Everyday use
Everyday use
- Compact under sink fit. Keep the countertop available for daily use.
- Three stage filter. PP cotton, activated carbon and ultrafiltration.
- No electricity. Operates using the incoming water pressure.
- Connection options. Check the listed 3/8 inch or 1/2 inch fittings.
What’s included
What’s included
- M8-2 filter unit and integrated filter element
- Water tubing and faucet connector
- Installation accessories
- User manual
Filter care
Filter care
Listed replacement interval: 12 months.
Actual life depends on water quality and daily usage. Use the correct replacement element for M8-2.
Shipping Notice
Shipping Notice
Estimated Delivery: 5–12 business days
Each product is prepared and tested before shipment. Tracking information will be provided once your order ships.
Shipping Areas: U.S. only. We currently do not ship to American Samoa, Micronesia, Guam, Marshall Islands, Northern Mariana Islands, Palau, Puerto Rico, or the U.S. Virgin Islands.
Alaska & Hawaii: Available for select products with an additional shipping fee.
Designed for Modern Living
Space inside the cabinet
A single filter housing fits beneath the sink. Check clearance for installation and servicing.
A Day with M8-2
First glass of the morning
Fill a glass at your kitchen faucet before the day gets busy.
Prep at the sink
Rinse produce as you get lunch ready.
Water for dinner
Fill a pot from the cold-water tap while you get dinner started.
A bottle on your way out
Top up a reusable bottle before you leave.
Look Closer
Detail images are illustrative. Follow the installation guide for setup.
Upper mounting bracket
The bracket near the top is for cabinet fastening if you choose to secure the housing. The cold-water connection is required for operation.
Three stages in one cartridge
PP sediment filtration, activated carbon and an ultrafiltration membrane in a single assembly.
Cold-water connection
The kit connects to a compatible cold-water line. Check your fittings against the installation guide.
Your existing faucet
Filtered cold water dispenses from the faucet you already use.
Quality & Support
EPA-Registered Facility
Made in a registered facility.
PUFLOW / M8-2
Installation
Specifications
| Specification | Value |
|---|---|
| Model | M8-2 |
| Product Size | 5.1″ × 4.3″ × 13.6″ |
| Filtration Accuracy | 0.01 μm |
| Flow Rate | Up to approximately 106 US gal/hour |
| Working Pressure | Approximately 14.5–58.0 psi |
| Applicable Water | Municipal tap water |
| Operating Temperature | 41–113°F |
| Connector Size | 3/8″ or 1/2″ |
| Installation Location | Under sink |
| Power Requirement | None |
Customer Reviews
Overall rating: 4.8 / 5 from 76 reviews.
I was actually surprised by how easy the installation was. The product description mentioned it could take around 30 minutes, but I finished mine in about 10. To be fair, I am a pretty handy person and already had the tools I needed at home, so that probably helped. The reason I am giving it 4 stars instead of 5 is the instruction booklet. It is a little too simple in my opinion. There are not many detailed steps, and if this is your first time installing something under the sink, I can see how some parts might be confusing. I reached out to customer service about it, and they responded much faster than I expected. I was prepared to wait 24 to 48 hours, but they got back to me pretty quickly and sent me a link to their online installation guide. That made everything much clearer. I also suggested that they include more detailed instructions in the package, especially for people who are not familiar with plumbing connections. They seemed very open to the feedback, which I appreciated. I believe they may have added the online instructions to the product page as well, although I have not checked again. Other than the booklet, I really have no complaints. The installation itself was simple, the size works well under my sink, and I appreciate how helpful their support team was. Just think the printed instructions could use a little more detail.
One thing I wanted to mention is that after installing this filter, the water flow does get noticeably slower compared to before. Personally, I do not really mind it because I understand that the water has to pass through the filtration media before coming out of the faucet, so some reduction in flow is expected. My wife, on the other hand, is still getting used to it lol. She keeps saying the water used to come out much faster, especially when she is washing vegetables or filling up a pot for cooking. We actually had a little disagreement about this because I think it is a reasonable trade off for having filtered water, but she just misses the stronger flow. Funny enough, even though she complains about the water pressure sometimes, she is also the one who likes having the filter the most. Before this, she would always avoid drinking straight from the tap. Now she feels much more comfortable filling her glass directly from the kitchen faucet. We also use it for washing vegetables, preparing food and cooking, which makes us both feel better about the water we use every day. I would not say the slower flow is a problem with the product itself, just something to be aware of if you are used to really strong water pressure. It definitely takes a little getting used to. Overall we both really like it, even if we still disagree about the water flow. For us, having filtered water available right from the kitchen sink is worth that small adjustment.
I used to have one of those faucet water filters, and honestly it was fine when it was just me and my husband. But we recently welcomed a new family member, so I started thinking more about our drinking water and whether we needed something better for everyday use. I spent quite a while looking at under sink systems, but most of the ones I found were pretty bulky and required drilling a separate hole in the countertop. Since we rent, I asked our landlord about it and unfortunately got a no. I really did not want to risk losing our deposit over a water filter. Then I came across this one while searching online. At first I was a little confused because it looked so much smaller than the under sink systems I had been researching. I actually had to read through the product details a few times to make sure I understood what it was. What convinced me was that it does not need electricity or a separate faucet, and I would not have to drill into our countertop. That was exactly what I had been trying to find. Installation was a little confusing at first because this was my first time working with an under sink filter, but once I understood the connections, it was pretty straightforward. I did need a wrench to tighten one of the fittings properly. Now that everything is installed, I am really happy with it. It does not take up much room in the cabinet, and we can still use our kitchen sink normally. For our family and our rental situation, this is pretty much exactly what we needed. Really glad I found it.
I enjoy using it every day and filling my water bottle has become much more convenient.
Overall this is exactly the kind of under sink filter I was looking for. The size is great, it fits easily under my sink without taking up much space, and for the price I think it is a really good option. The only issue I ran into was with my cold water shut off valve. The threaded connection on my valve was a little shorter, while the connector that comes with this filter is fairly deep. Even after tightening it all the way down, it still had a small leak because it could not fully seal. Luckily I already had a 1/4 inch sealing gasket at home, so I used my own part and the leak was gone right away. If I did not already have that gasket, I probably would have had to stop the installation until I found one. I think it would be nice if the kit included an extra sealing washer or a slightly different connector to fit more types of valves. The product does come with a no thread tape fitting, but I found I had to wrap quite a few layers of thread tape to get a proper seal. Since I had a 1/4 inch PPR silicone sealing gasket in my toolbox, I ended up using that instead and it fit perfectly with no more leaks. Once everything was installed, though, I have been really happy with it. It is compact, easy to hide under the sink, and performs exactly the way I wanted. For someone looking for a small under sink filter instead of a bulky system, this has been a great fit.
I live in an apartment by myself and have been dealing with some skin issues, so I started looking into getting a water filter. I talked with my landlord first about replacing the faucet, but they said no because it would affect the apartment and probably my deposit. Since I rent, I really did not want to risk that. At first I looked at regular under sink systems, but most of them are pretty big and really designed for a whole family. I did not need something that large. I spent quite a while researching until I came across this one. Honestly, I was surprised by the size. Compared to most under sink filters, especially the electric RO ones, this one is much more compact. It is not a reverse osmosis system, it is a pp cotton+active carbon+UF filter, but for my needs it is more than enough. Because of my skin issue, I even asked my doctor, and they said filtering down to 0.01 micron is perfectly suitable for what I was looking for. Another reason I picked this one is because the installation is much easier than most under sink systems. It does not require drilling a hole for a separate faucet. You only connect the inlet and outlet, which made it much more renter friendly. I did struggle a little with one of the connectors because it needed a bit more strength than I expected, and I did not have a wrench at home. the rest was easy. Since I cannot drill into the cabinet wall, I just placed the unit inside the cabinet instead. It is still compact enough that I have plenty of room left for my cleaning supplies and other kitchen items. Overall it has been exactly what I was looking for. simple and renter friendly, and it fits my needs really well without taking over the whole cabinet. I am going to get another one for my kitchen as well.
Very happy with this system. It took me about half an hour to install and having a wrench nearby definitely helped with tightening the fittings. If you dont have a wrench to tight the connected parts. It will take much longer installation.
The installation took about forty minutes at my own pace. Definitely manageable for a first timer.
Very satisfied with this purchase. It has been working exactly as described.
The design is clean and compact. It fits nicely without taking away too much storage space.
I only needed a wrench for one connection and the rest was very straightforward. Great experience overall.
Everything arrived well packaged and nothing was missing. Installation went smoothly.
Really pleased with the steady water flow and clean taste. It has been reliable every day.
The overall quality exceeded my expectations. It feels like a product built to last.
I did not notice a huge difference in taste because our local water was already pretty decent, but I still like having the extra filtration.
I have had no leaks or issues since installation. The setup process was smoother than I expected.
Very happy with this system. It runs quietly and does not take up much space under the sink.
I bought this mainly for peace of mind, and it has done exactly what I wanted.
Everything has worked exactly as expected. I would definitely recommend it to friends.
Water tastes fresh and clean every time. Even my family noticed the difference.
The instructions were easy to follow and the installation video was helpful. Very satisfied with the result.
Good experience overall. It took me a little extra time to make sure every connection was secure, but it has worked perfectly since.
I like having filtered water available anytime without having to think about it. It has become part of my daily routine.
Installation was much less intimidating than I expected. I finished it myself without any problems.
Really impressed with the quality of the materials. Everything feels solid and well made.
I appreciate how compact this system is. It fits under my sink without getting in the way.
Very happy with the performance. The water tastes clean and the flow has been steady.
Everything fit perfectly during installation. Having a wrench nearby made tightening the final connection much easier.
The water has been consistently great since day one. I wish I had installed this sooner.
Everything has been working exactly as expected. I would definitely purchase it again.
Very pleased with the quality. The parts fit together well and nothing leaked during installation.
I was hoping to notice a bigger difference right away, but after using it for a while I do appreciate having filtered water available.
The product has been reliable. It blends in nicely under the sink and does not take up much room.
I have had no issues since installing it. Everything has worked smoothly from the first day.
The water feels cleaner and I like knowing we have filtered water available all day.
I bought this mainly for peace of mind and it has delivered exactly that. Very happy overall.
Installation was easier than expected. I finished everything in under an hour without needing professional help.
The water quality has been consistently good. Coffee and tea both seem to taste better now.
This system works exactly as described. Quiet, compact, and easy to use.
Good experience so far. I needed a wrench to tighten one connection, but it was not difficult.
Got a less-frequently asked question?
FAQs
Is this reverse osmosis?
No. M8-2 uses PP cotton, activated carbon and ultrafiltration. It is not an RO system.
Will it fit my kitchen or RV?
Check the 130 × 110 × 345 mm dimensions, 3/8 inch or 1/2 inch connectors and 0.1–0.4 MPa working pressure. The listed water source is municipal tap water.
Does it need electricity?
No. The filter works using the incoming water pressure.
How often should I change the filter?
The listed interval is 12 months. Water quality and daily usage affect actual replacement timing.