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💨 Keep your airflow flawless — because your tools deserve the best!
The LE LEMATEC AI303 Air Compressor Water Separator is a compact, high-efficiency inline filter designed to remove moisture, oil, and dirt from compressed air lines. Featuring a rugged aluminum housing and brass fittings, it fits standard 1/4" NPT connections and operates at 5-150 PSI. Its centrifugal gravity separation technology ensures zero pressure drop while protecting pneumatic tools and paint finishes. With a convenient push-button drain valve, it offers quick maintenance and reliable, professional-grade air quality for automotive, hobbyist, and industrial applications.











| Asin | B01N4FMOMU |
| Best Sellers Rank | #54,597 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #135 in Air-Compressor Accessories |
| Brand Name | LE LEMATEC |
| Compatible Devices | air compressor air filter, air water separator for air compressor, compressor air dyer, compressor air filter, inline air dryer |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,730) 4.4 out of 5 stars |
| Filter Mounting Type | Screw In |
| Global Trade Identification Number | 00850030726711 |
| Item Dimensions L X W X Thickness | 1.57"L x 1.57"W x 3.62"Th |
| Item Highlight | Moisture trap, paint gun & plasma cutter ready, auto-draining pneumatic dryer, model AI303 |
| Item Weight | 5.6 ounces |
| Manufacturer | LE LEMATEC |
| Manufacturer Part Number | AI-303 |
| Material Type | Aluminum, Stainless Steel |
| Model Number | AI303 |
| Number Of Items | 1 |
| Number Of Packs | 1 |
| Product Grade | Like New |
| Unit Count | 1 Count |
User
Convenient and good value
This is a great little filter/dryer! I purchased this air dryer for use with an old 3-gallon horizontal air compressor that a friend gifted to me, and which I use for low-flow applications. Rather than installing the dryer right at the tool, where if would increase the overall size of the tool and could be snagged, or be subject to the weight of the hose, I installed it at the compressor outlet quick coupler, where it is out of the way and not subject to excessive pulling. When I'm done with the task I simply rotate the dryer around so that the drain button is at the low end and press the button to expel the condensate. Quick, easy, totally effective, and great value.
User
Update .... One of two units are unusable.
Leak at point between air release button and body of unit. Both ordered at different times.First one appears to be great, installed with ease, no leaks and does a good job eliminating moisture.Second unit leaks to the point that it is unusable.Unfortunately the bad unit sat on my desk for too long, and wasn't returnable. I hope the company makes it right.Only 50% worked. Not satisfactory at all.UPDATE - I was contacted by the seller who will replace the defective unit. Changed from 2 stars to 4 stars due to sellers response. After install will update review if necessary.Exemplary Customer Service. The company was quick to make things right. Cannot say enough for them. Used on two compressors. Both units in a 1800 sq ft shop, 1 upstairs and 1 downstairs. Both work just fine. If your looking to keep your airtools and plasma cutter running smooth, keep your air clean. These do the job Thank You
User
Can’t get more then 30psi
Works but for some reason I can’t get more then 30psi from it does anybody know why?I have a 100psi coming from air line
User
Must have
works great and was easy to install. The filter has reduced the amount of condensation in my air take and seems to be well built with no issues.
User
It really works
Works great a clearing the water out of the air line
User
Works great and looks to be high quality and solid
I always use upstream oil-water filters but nonetheless I believe this did an awesome job on any that might have formed in the line as I did three panels in Texas humidity and no water issues
User
Longer lasting but still disposable
It works but the discharge valve appears to have corroded shut after about 5-6 hours of use on a paint gun. A bit better than purely disposable - but for me it is also disposable. YMMV
User
Good
No air levels
User
It works and is quite good
Installed one of these and it definitely traps moisture, drained the compressor and used this as defenceWorks
User
15年前に取り付けたものがエアー漏れするようになったので交換
15年前に取り付けたものがエアー漏れするようになったので交換しようと思い検索していたらアマゾンにあった。安くは無い商品だが、ほかの店には無いし、安心して使えるので◯。
User
Perfekt
Macht was es soll. Verarbeitung super
User
Versatile product
The product is totally amazing and works even better than described, highly I would recommend for all, a must have industrial product. Made in Taiwan the quality is amazing. Do not miss out on this in line filter from le matec.
User
Show de bola
Tudo ok.
Trustpilot
2 months ago
1 month ago