








💨 Keep your air tools dry and your projects flawless — no moisture, no compromises!
The LE LEMATEC AI303-C1 Air Compressor Water Separator & Air Dryer efficiently removes moisture down to 1 micron using advanced compressed air dryer technology. Designed for professional-grade tools like HVLP spray guns, sandblasters, and plasma cutters, it operates reliably across a broad pressure range of 2-150 PSI with minimal pressure loss. Featuring a one-way valve to prevent backflow and contamination, plus a push-button drain valve for easy maintenance, this compact aluminum inline separator ensures longer tool life and consistent performance with universal 1/4" NPT fittings.














| ASIN | B07KW1CN5B |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #35,985 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #73 in Air-Compressor Accessories |
| Customer Reviews | 4.4 4.4 out of 5 stars (2,609) |
| Date First Available | November 25, 2018 |
| Included Components | Teflon Tape |
| Installation Method | Screw-In |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 6 ounces |
| Item model number | AI303-C1 |
| Manufacturer | Ubiquitous |
| Material | Aluminum |
| Part Number | AI303-C1 |
| Product Dimensions | 1.57 x 1.57 x 3.62 inches |
| Shape | Round |
| Size | 1.6" x 1.6" x 3.6" (With Adapter) |
| Special Features | Air Inlet Thread Size (NPT) |
| Usage | Air Compressors |
D**M
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.
G**Y
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
S**E
Good Filter. Great service.
The first filter worked well but there must have been a manufacturing defect because it blew apart after a few weeks. I run a 135 psi mcgraw compressor from harbor freight and the filter is rated to 150 psi. The air is very humid where i live and the filter kept a lot of water out of the line. I contacted the manufacturer and his first question was if anyone was hurt. Luckily no one was near the compressor. He proceeded to refund my money and overnighted a new filter to me. Great service!
M**O
Worked great!
Very good item. I used as the last step of water entrapment in my air compressor system. It worked great.
E**R
Good
No air levels
O**E
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
P**T
Easy to Use and No Clumps
An online video suggested we purchased this separator when we bought our sandblaster gun, seems that compressed air tends to be moisture rich. I never knew the air was that "moist" we just used it for cleaning vacuum filter housings and the sawdust cyclone in our shop. Using our sandblaster gun, I have to drain this about once an hour. This little device was easy to install, easy to drain and evidently, it works perfectly as we never have media clumping. Definitely glad we got it.
M**R
Cumbersome Connection & Leaking Drain Valve
This review is for LE LEMATEC Air Compressor Water Separator AI303. The first thing I noticed about this device after receiving it is that it is more annoying to connect than it should be. They have the fittings reverse of what they should be. I had to use adapters on both ends, making this device longer than it needs to be. I also noticed that it leaks air out of the drain valve. It is an inexpensive item, so I wasn't really expecting much out of this. I can't tell if the device is working or not. I've only used it a little bit so far. The most common thing I use my air compressor for is keeping my car's tires at the right pressure, and on rare occasions, I will use for a project around the house. I haven't decided if I am going to return this or exchange it yet.
A**K
Installed one of these and it definitely traps moisture, drained the compressor and used this as defence Works
た**う
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◯。
A**.
Macht was es soll. Verarbeitung super
M**D
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.
家**人
今まで近場のホームセンターで硬いプラスチックのフィルターを買ったり、塗料販売店から仕入れたりしてましたが、アマゾンでこの価格で購入できて、しかも丈夫な商品んでありなからほぼ 1mp( 一馬力)のエアーの量が通る 津ぐれもの! 使い初めですが、いい商品だと思います。 塗装メインの仕事には最高なアイテム。 オススメです。
Trustpilot
4 days ago
2 months ago