--- product_id: 3603918 title: "30252A Water and Oil Separator for Air Line | 1/4\" NPT Inlet and Outlet | 90 PSI | Air Compressor and Air Tool Accessory | Protect Lifespan of Pneumatic Tools | Water Moisture Filter Dryer" brand: "neiko" price: "$21.32" currency: USD in_stock: true category: "Neiko" url: https://www.desertcart.us/products/3603918-30252a-water-and-oil-separator-for-air-line-1-4 store_origin: US region: United States of America --- # 90 PSI max pressure 1/4" NPT universal inlet/outlet Aluminum & brass durable build 30252A Water and Oil Separator for Air Line | 1/4" NPT Inlet and Outlet | 90 PSI | Air Compressor and Air Tool Accessory | Protect Lifespan of Pneumatic Tools | Water Moisture Filter Dryer **Brand:** neiko **Price:** $21.32 **Availability:** ✅ In Stock ## Summary > 💨 Keep your air tools dry, clean, and unstoppable! ## Quick Answers - **What is this?** 30252A Water and Oil Separator for Air Line | 1/4" NPT Inlet and Outlet | 90 PSI | Air Compressor and Air Tool Accessory | Protect Lifespan of Pneumatic Tools | Water Moisture Filter Dryer by neiko - **How much does it cost?** $21.32 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/3603918-30252a-water-and-oil-separator-for-air-line-1-4) ## Best For - neiko enthusiasts ## Why This Product - Trusted neiko brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Performance Maximizer:** Maintains clean, dry air at up to 90 PSI for consistent, professional-grade tool output every time. - • **Crystal Clear Monitoring:** Transparent housing lets you visually track trapped moisture and debris—never get caught off guard. - • **Quick-Release Convenience:** Built-in valve for fast, hassle-free drainage keeps your workflow smooth and downtime minimal. - • **Ultimate Moisture Defense:** Stops water, oil, and particles from damaging your air tools—extend their lifespan effortlessly. - • **Universal Fit & Easy Install:** 1/4" NPT inlet/outlet fits any standard air hose for seamless integration into your setup. ## Overview The NEIKO 30252A Water and Oil Separator is a lightweight, durable air compressor accessory designed with 1/4" NPT universal fittings and a max pressure of 90 PSI. It effectively filters out water, oil, and debris from compressed air, protecting pneumatic tools and enhancing their performance and longevity. Its transparent aluminum and brass housing allows easy monitoring, while the quick-release valve ensures simple maintenance—ideal for professionals and enthusiasts aiming to safeguard their investment and maintain peak tool efficiency. ## Description The Neiko 30252A Water and Oil Separator features a universal 1/4-inch NPT inlet and outlet and is made to be compatible for any compressor, air hose, air tools and spray guns. The separator has a maximum air pressure of 90 psi and serves as the gate keeper between your compressor and air tools. By filtering the water and oil and trapping it inside of the self-contained unit, the 30252A will ensure longevity in your tool collection and help you maintain air tools that perform at an optimal level every time. A must-have for tool enthusiasts, this inexpensive air tool accessory can save you hundreds and even thousands of dollars in replacement tools. Whether at your home garage, paint shop or mechanics shop this air filter dryer attached to your air compressor and is designed to remove all the liquid water, vapor, solid particles, trash, debris, oil, and oil vapor from the machine. As it removes all sorts of contaminants from the compressed air in air hoses. Inline water trap cleans and dries the air that gets delivered to your air tool instead of unfiltered air. ## Features - WATER SEPARATOR: Add this air-tool accessory to your shop or garage to stop moisture, water, oil, and particles from entering air-spray guns and air-compressor tools. You can also add it to your compressor hose to keep the equipment working efficiently. - OIL SEPARATOR: This spray-gun unit separates the oil from the air as it goes through your air hose. The oil stays inside the compressor to keep it lubricated while the compressed air stays free of oil, ensuring maximum air output to your air tools. - OPTIMIZE PERFORMANCE: Available in 90 PSI or 150 PSI versions, this oil-water separator traps water vapor and dust to maximize performance for cleaner and more even jobs, saving you countless dollars in replacing expensive air tools. - EASY TO SEE: This air-compressor in-line dryer has a clear build that allows you to easily monitor buildup and the amount of trapped water and dust particles. It also has a convenient quick-release valve to remove anything trapped inside. - SPECIFICATIONS: The air-compressor moisture filter comes with a 1/4-inch NPT inlet and outlet and will fit any standard air hose with a 1/4-inch fitting. The durable aluminum housing with brass fittings will withstand rugged everyday use. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B002GQ3SUA | | Additional Features | Lightweight | | Best Sellers Rank | #28,251 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #52 in Air-Compressor Accessories | | Brand Name | NEIKO | | Capacity | 90 pounds | | Color | Transparent | | Compatible Hose Diameter | 0.25 inches | | Customer Reviews | 4.5 4.5 out of 5 stars (5,807) | | Global Trade Identification Number | 00837013302520 | | Included Components | 1/4" NPT Water and Oil Separator | | Item Dimensions L x W x H | 6.8"L x 5.1"W x 2"H | | Item Type Name | Water and Oil Separator for Air Line | 1/4" NPT Inlet and Outlet | 90 PSI | Air Compressor Accessories | | Item Weight | 3.52 ounces | | Manufacturer | Ridgerock Tools Inc. | | Manufacturer Part Number | 30252A | | Material Type | Aluminium Brass | | Maximum Horsepower | 0.13 hp | | Maximum Power | 0.13 hp | | Maximum Pressure | 90 psi | | Model Name | 30252A | | Model Number | 30252A | | Number of Items | 1 | | Power Source | Air Powered | | Recommended Uses For Product | Spraying | | Style | Oil/Water Separator - 90psi | | UPC | 837013302520 | | Unit Count | 1 Count | | Voltage | 100 volts | ## Product Details - **Brand:** NEIKO - **Power Source:** Air Powered - **Recommended Uses For Product:** Spraying - **Special Feature:** Lightweight - **Voltage:** 100 volts ## Images ![30252A Water and Oil Separator for Air Line | 1/4" NPT Inlet and Outlet | 90 PSI | Air Compressor and Air Tool Accessory | Protect Lifespan of Pneumatic Tools | Water Moisture Filter Dryer - Image 1](https://m.media-amazon.com/images/I/71+Il6eMhML.jpg) ## Available Options This product comes in different **Size, Number Of Items** options. ## Questions & Answers **Q: OK just got this thing, no markings for flow directions and two conflicting answers for inlet and outlet. which is correct?** A: I see where the confusion is. The fittings seem to be on backwards. At least for my rig. Not to mention it's backwards in one of the promo pix. Way to go Neiko! Here's how I'm fixing mine. Female quick disconnect is fixed on my compressor, male quick disconnect -----> 1/4" FNPT ($6 for two) filter (the shiny drain valve should point back to the compressor, not the tool) *** Ideally the last piece would be a 1/4" FNPT to 1/8" BSPT (but I can't find one) 1/4" MNPT to 1/4" MNPT ($7.80 for four) 1/4" FNPT to 1/8" BSPT (running an airbrush, so I have to reduce down to this quirky size) **Q: I have a supply air line hanging from the ceiling and I connect to the bottom of it. Which way would the filter be hanging for best performance?** A: yes the valve should be at the bottom ! These filters appear to work both ways @! i have several and there don't appear to be any restriction on air flow either way i hook it up ! It should be fine both ways ! Might want to try it and see if it affects air flow for you ?I really don't care for it in the line and rather use it mounted on my paint gun ! I use the throw away ones for painting and this style for air tools with them mounted to the tool itself ! **Q: Can I put this after the regulator or will that drop pressure too much?** A: I recommend the bottom of you gun if possible. It is made to allow free flow. The pressure may drop a fraction of a pound. Not enough for anything... it pretty much just filters the moisture so you don't have water spots out your gun as you spray. I used it in line for an airbrush but would recommend an iwata if you are using it for that application **Q: Why are the reviews and questions for this model (30253A) the same as for model 30252A? There is clearly an error.** A: Check the manufacturer's specifications. It might be small dimension changes that do not affect the ability of the unit, i.e. length, diameter, etc. ## Frequently Bought Together - NEIKO 30252A Water and Oil Separator for Air Line | 1/4" NPT Inlet and Outlet | 90 PSI | Air Compressor and Air Tool Accessory | Protect Lifespan of Pneumatic Tools | Water Moisture Filter Dryer - TCP Global 50 Pack of Ultra-Flow Blue Nylon Mesh Paint Strainers with 190 Micron Filter Tips - Premium Cone Screen Filters - 3M Accuspray Air Flow Control Valve, 16573 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/3603918-30252a-water-and-oil-separator-for-air-line-1-4](https://www.desertcart.us/products/3603918-30252a-water-and-oil-separator-for-air-line-1-4) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-10-25*