What's the difference between the AI303 and the ZN312?

AI303 is a gravity separator removing bulk liquid and oil via centrifugal force. The ZN312 is a 1-micron filter capturing fine mist/moisture. For best air quality, install AI303 first (Stage 1) and ZN312 second (Stage 2).

Will this cause pressure drop in my air line?

No. The AI303 features an optimized flow path engineered to maintain full downstream pressure. Unlike cheap restrictive filters, it uses centrifugal separation that works WITH the air flow. Your tools will perform at their maximum pressure.

How often do I need to drain the bowl?

Drain frequency depends on humidity. Check the transparent bowl and push the drain valve when water reaches the 1/3 mark (takes 2 seconds). In hot, humid conditions, drain every 30-60 minutes. Standard 1/4" NPT connections install in minutes.

Why aluminum instead of plastic?

Aluminum offers 3 advantages: (1) Thread integrity to prevent stripping, cross-threading, and air leaks. (2) Corrosion resistance against separated moisture. (3) Structural strength to handle pressure surges without cracking. Built to last.

Is the AI303 compatible with my tools?

Yes. With standard 1/4" NPT connections (female inlet, male outlet), the AI303 is compatible with virtually all home and professional compressors and tools, including HVLP guns, airbrushes, and impact wrenches. Operating range: 5-150 PSI.

Le Lematec Air Compressor Water Separator Generates Clean Dry Air

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Description

💨 Keep your tools dry, your projects flawless, and your workspace ahead of the curve!

BUILT TO ENDURE - Rugged aluminum construction withstands harsh job site conditions effortlessly.
COMPACT SPACE SMART - Sleek design fits tight workspaces without compromising filtration power.
UNIVERSAL COMPATIBILITY - Easily connects to standard 1/4" fittings for seamless integration with your gear.
MAXIMIZE TOOL EFFICIENCY - Delivers clean, dry air to boost pneumatic tool performance and longevity.
CONSISTENT MOISTURE CONTROL - Advanced oil moisture separator ensures flawless, professional-grade airflow every time.

The LE LEMATEC AI303 Air Compressor Water Separator is a compact, durable inline filter designed to deliver clean, dry air at up to 150 PSI. Featuring a robust aluminum body and universal 1/4" fittings, it efficiently removes oil and moisture to extend tool life and maintain peak performance, making it an essential upgrade for professionals and DIY enthusiasts aiming for flawless pneumatic tool operation.

Specifications

ASIN	B01N4FMOMU
Amazon Bestseller	#117,896 in DIY, Tools & Garden ( See Top 100 in DIY, Tools & Garden ) #171 in Air-Compressor Accessories
Batteries Included	No
Batteries Required?	No
Brand Name	LE LEMATEC
Compatible Device	Air Conditioner
Customer Reviews	4.4 4.4 out of 5 stars (1,584)
Date First Available	May 5, 2017
Is Discontinued By Manufacturer	No
Item Dimensions L x W x H	40 x 40 x 92 mm
Item Weight	159 g
Material	Aluminum
Part Number	AI-303
Select	AI303
Special Features	Air Compressor In-Line Filter, Inline Air Filter for Air Compressor, Paint Gun Filter

Reviews

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◯。

30.08.2025

A**.

Macht was es soll. Verarbeitung super

28.04.2019

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.

28.07.2024

G**A

buena relacion valor precio

25.03.2023

I**A

Tudo ok.

21.06.2025

G**Y

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

19.11.2025

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Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

€ 4582.03

Duties & taxes included

In stock

Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Italy.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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