Top 10 Best water separator for air compressor in 2026

Last Updated - 6/12/2026

🏆Best Choice

NANPU

NANPU 3/8" NPT Compressed Air Filter Regulator Lubricator Combo Water/Oil Trap Separator - Gauge(0-150 psi), Poly Bowl, Semi-Auto Drain, Bracket - 3 in 1 Two Unit

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•3/8" NPT Piggyback Filter Regulator Lubricator Unit
•Operating Pressure: 0-125 PSI
•5 Micron Brass Filter Element, Excellent Filtering Performance, Much Longer Life and Reuse Feasibility
•Flow Rate: 60 SCFM (1700 L /Minute)@ 90 psi
•Includes Semi-Auto Drain & Polycarbonate Bowl with Metal Guard, 0-150 Gauge & Bracket，a pair of Air Coupler＆ Plug Kit, 2 x 3/8" NPT Fittings, 1 x Thread Seal Tape

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$34.99

$38.99

-10%

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AIRZOE

AIRZOE 3/8" NPT Air Dryer for Compressor - Air Compressor Water Separator AF3000-03, Manual Drain,5 Micron Brass Element, Poly Bowl

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•3/8” NPT Air Dryer For Compressor - Air Compressor Water Separator AF3000-03,Excellent filtration performance,Long service life, Reusable
•Specified Value: Working pressure 0-145psi, Temperature range: 41-140℉(5-60℃) , Flow:1500L/Minutes
•5 Micron Brass Filter Element: Excellent filtration performance,Long service life, Reusable
•Excellent Performance: The filter design effectively removes most moisture and fine solid particles from the air supply
•Product Package: Includes polycarbonate bowl and manual AF3000-03

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$15.99

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Hromee

Hromee 1/4 Inch Air Compressor Filter Regulator Combo, Water Oil Separator with Pressure Gauge, Manual Drain, Ball Valve and Bracket AW2000-02

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•BRASS FILTER ELEMENT - Filtering moisture and fine particles to get clean and dry air which prevents damage to air tools, spray guns and pneumatic equipment. The filter element is brass that provide higher efficient filtration and long lifetime than the fiber one.
•PRESSURE REGULATOR - With the adjustable pressure control knob, you can pull up and turn the black knob at the top of the regulator to set desired pressure. No matter the size of the inlet pressure and flow fluctuations, always maintain a stable outlet pressure.
•GAUGE&FILTER CUP - The pressure gauge is more accurate to the pressure induction and the metal shell is resistant corrosion. The dial scale has two units of measurement: psi and mpa. The Max pressure is 150 PSI. The filter cup is designed to be transparent for observing the volume of water and oil.
•EXTRA ACCESSORIES - The ball valve is made of forged brass for corrosion resistance, ductility at high temperatures and low magnetic permeability. It has a plastic-covered lever handle for on/off manual control. Some necessaries are also included in this kit: a double MNPT fitting and a thread seal tape.
•PIGGYBACK- Air pressure regulator combines the functions of both air filter and regulator. It is compact and much effective when space is constrained. The bracket is designed to provide a secure way to mount a filter regulator and easy removal.

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$18.99

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LNCHKA

LNCHKA Air Filter Dryer 3/8 NPT Auto Drain+Semi-Auto Drain-Double Air Filters,Air Pressure Regulator,Air Compressor Water Separator(0-150PSI)

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•【Conditions Of Use】:Air pressure regulator 3/8 npt/Double air pressure filter should meet the values specified As follows: Maximum pressure:145PSI,recommended pressure adjustment range:0-120PSI Suggest using a temperature of 41-140 ℉ Flow rate: 60 SCFM (1700 L/min)
•【Use Of Pressure Regulator】:Pull up the gray rotation button to control the pressure and adjust it to the desired pressure. Press the gray rotation button to maintain stable outlet pressure
•【Products】:The filter cup is made of transparent polycarbonate,which is a high-performance engineering plastic with high transparency,strong impact resistance,sound insulation,heat insulation,flame resistance and aging resistance The filter material uses a brass filter element,which is corrosion-resistant and filters air cleaner,resulting in a longer service life for the equipment
•【Advantage】:AN air pressure regulator is a component that does work by converting the elastic energy of compressed air into kinetic energy through the force generated by gas pressure or expansion.The structure of an air compressor regulator is simple,lightweight,and easy to install and maintain.The medium is air,which is less flammable than hydraulic medium,so it is safe to use. Suitable for use in:air compressor paint sprayer,pneumatic cylinder,badger airbrush
•【Air Compressor Filter Dryer】:Includes Auto Drain+Semi-Auto Drain & Polycarbonate Bowl,0-150 PSI Gauge,2 x 3/8" NPT plug,pair of 3/8 NPT brass material rapidairconnectors,1 x Thread Seal Tape

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$49.99

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ENDOZER

ENDOZER Oil Water Separator, Air Filter with Pressure Gauge, Pressure Regulator for Air Spray Gun, G1/4" Inlet and Outlet

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•It consists of three parts: which are blue part for air pressure regulators, transparent part for water filter and the last part for stainless steel adapter
•The air filter is made of plastic and aluminum alloy, rust resistant and lightweight, and can be installed on various air tools without any burden on you. It is simple and convenient to grip.
•The water and oil separator can be directly connected to paint airbrush, air compressors and other pneumatic tools; It can be applied with airbrush, pneumatic tools and hoses, capable of capturing water vapor and oil particles entering pneumatic tools to extend tool life and provide cleaner operations, keeping your equipment performing at nice condition
•The air adjusting regulator valve is suitable for most spray tools and airlines, such as spray paint gun, air pressure cleaner, airline dryer and so on, which can be applied as a compact filter for air spray guns

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$9.99

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LE LEMATEC

LE LEMATEC Air Compressor Water Separator, 1/4 NPT Inline Filter & Moisture Trap for Pneumatic Tools, HVLP Spray Paint Gun & Airbrush, Durable Compressed Air Dryer with Easy Drain Valve, AI303

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•Optimal Tool Performance: Provides clean, dry air with an oil water separator for peak tool efficiency.
•Flexible Applications: Perfect for sandblasting, painting, and other pneumatic tasks.
•Protect Your Investment: Filters out oil and moisture to extend tool life and performance.
•Built to Endure: Constructed with a durable aluminum body, made for tough conditions.
•Space-Saving Design: Compact air compressor filter and oil water separator, ideal for tight workspaces.
•Universal Compatibility: Easily connects with 1/4-inch brass or steel fittings for convenience.
•Superior Moisture Control: Integrated oil water separator efficiently removes contaminants.
•Achieve Flawless Finishes: Maintains consistent airflow for smooth, professional results every time.
•Designed for Pros & DIYers: Ideal for both professionals and DIY enthusiasts aged 25-55.
•Reliable Filtration System: Ensures compressors and tools stay in top condition with consistent air drying.

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$16.59

$19.99

-17%

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NEIKO

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

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•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.

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$10.97

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Mudder

3 Pcs Compressed Air Filter Water Oil Separator 1/4 Inch NPT Inlet and Outlet Airbrush Filter Moisture Separator for Air Line Compressor Fitting, 90 PSI

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•What you get: you will receive 3 water oil separators, the blue end (concave) is the "outward" side of the airflow, and the connector side (convex) is the inlet for the airflow, they are easy to install and ergonomically designed for your convenience and ease of use
•General import export :standard universal male and female 1/4 inch NPT inlet and outlet designs make it easy to connect pneumatic lines to pneumatic tools and airbrush to accommodate most pneumatic tools for convenience
•Sturdy material: the water oil separator is made of polycarbonate housing, aluminum valve body and solid brass fittings, it has good anti-oxidation performance, which greatly improves the durability and reliability of the tool and prolongs its service life
•Extend tool life: clean air is essential in pneumatics, this filter can not only be applied as a water separator for air compressors, but also effectively trap oil and dust, so only clean air can to pneumatic tools; Greatly reduce the disposal of worn airbrush and other pneumatic tools, effectively extending the life of pneumatic tools
•Suitable applications: the water and oil separator can be directly connected to paint airbrush, air compressors and other pneumatic tools; It can be applied with airbrush, pneumatic tools and hoses, capable of capturing water vapor and oil particles entering pneumatic tools to extend tool life and provide cleaner operations, keeping your equipment performing at nice condition

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$12.99

$13.99

-7%

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THB

THB 1/2" Heavy Duty Particulate Filter Moisture Trap Water seperator w/Auto Automatic Drain

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•175 PSI Max Output pressure 175 PSI Max Input pressure

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$45.99

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THB

1/2" Particulate filter water trap seperator moisture Compressed Air Compressor

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•1/2" NPT PARTICULATE FILTER / WATER TRAP TO REMOVE MOISTURE FROM COMPRESSED AIR LINES.
•THIS UNIT HAS 5oz POLYCARBONATE BOWL WITH METAL BOWL GUARD. 5u MICRON FILTER REMOVES 95% OF MOISTURE AND DEBRIS.
•175 PSI MAX INPUT PRESSURE, 145 MAX OUTPUT PRESSURE, 106 CFM FLOW RATE. PLEASE NOTE::: 1/2" NPT MEASURES 0.850" OUTSIDE THREAD DIAMETER IN INCHES::::
•COMES WITH A SEMI AUTOMATIC DRAIN THAT ACTS LIKE AN OVERNIGHT DRAIN. WHEN PRESSURE IS APPLIED TO THE BOWL, THE DRAIN WILL HOLD THE MOISTURE CONTENTS UNLESS YOU MANUALLY DISCHARGE IT. WHEN NO PRESSURE IS APPLIED TO THE BOWL, THE DRAIN AUTOMATICALLY OPENS TO RELEASE THE MOISTURE.
•REPLACEMENT FILTERS CAN BE FOUND ON AMAZON. ASIN B01MTC8AAH. COPY PASTE ASIN TO YOUR AMAZON SEARCH BAR.

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$32.90

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