9 Best Water Separator for Air Compressor You Can Easily Install

Dirt, dust, oil, and water are very friendly to corrosion and loves to damage. No matter it’s your accessories or air compressor. In that case, the preventive measure you can take is the best water separator for the air compressor.

An air compressor for water removal makes sure that none of the containments pass through the hose to your air tools. They keep all solid and liquid particles to themselves, which keeps your pneumatic tools running smooth.

Do you know the hidden factor behind an air compressor’s long life? No wonder it’s a water separator. So, today we have shown up with the homework done and have got the ten best water separators for air compressors for you.

Let’s go, select one, and knock down the air contaminants just today.

Comparing the Best Water Separators for Air Compressors

Product Name



Maximum Pressure

Port Size


NEIKO 30252A

6.5 pounds

11.22 x 5.91 x 0.98 inches

150 PSI

¼ inch


NANPU Compressed Air Filter

2.32 pounds

10.24 x 5.67 x 3.54 inches

145 PSI

3/8 inch

Metal, Brass

Ingersoll Rand Water Separator

7.2 pounds

6.5 x 3.4 x 2.8 inches

150 PSI

¼ inch


TAILONZ Air Filter

14.11 pounds

8.31 x 3.74 x 2.2 inches

145 PSI

¼ inch


Mudder Water Oil Separator

9.6 pounds

3.54 x 1.97 x 1.97 inches

90 PSI

¼ inch

Aluminum, Polycarbonate

Creation Core Water-Oil Separator 

7.5 pounds

6.3 x 6.1 x 2 inches

4351 PSI


Le Lematec AI303-C1

5.6 pounds

4 x 1.8 x 1.7 inches

150 PSI

¼ inch


THB Water Trap Separator

14.9 pounds

7.91 x 3.23 x 3.23 inches

175 PSI

½ inch


FASTTOBUY Oil Water Separator 

7 pounds

7.52 x 5.63 x 1.3 inches

4351 PSI


9 Best Water Separators with Maximum Output

1. NEIKO 30252A – Best Water Separator for Air Compressor Overall

NEIKO 30252A
  • Weight: 6.5 pounds

  • Dimension: 11.22 x 5.91 x 0.98 inches

  • Pressure Holding Capacity: 150 PSI

  • Material: Aluminum

  • Port Size: ¼ inch

Are you looking forward to having a durable water separator? Neiko is all there for you. It has a brass fitting which is perfectly coated by aluminum. That prevents any dust or rust from striking it down.

With the ¼ NPT port size of the separator, it becomes universal. Ultimately, that allows you to use certain tools like a spray gun, nailers, or sanders. Catching the utmost debris, it ensures your compressor performs successfully for years to come.

As an adjustable unit, it deals with any pressure ranging from 25-150. Well, that’s good news, as most air compressors do have the same pressure. When installing it, note the simple key that the drain valve faces the bottom. Manufacturers have not mentioned it.


  • Easy to use
  • Fits the bill
  • Compatible with several tools
  • Durable


  • Require Teflon tape to tighten the fitting

2. NANPU Compressed Air Filter – Best Value for Money

2.	NANPU Compressed Air Filter
  • Weight: 2.32 pounds

  • Dimension: 10.24 x 5.67 x 3.54 inches

  • Pressure Holding Capacity: 145 PSI

  • Material: Metal, Brass

  • Port Size: 3/8 inch

While Nanpu’s separator has an inlet and outlet size of 3/8, you can also have others. Those include 1, ½, ¼, and ¾ inches and a few with the auto drain system, just like this one.

It has an auto drain valve located at the bottom. When filled 3/4, the unit becomes the master and drains the water for continuous and easy use. Already fitted with the wall mount and a metal cover are two of its major pluses.

As a three-in-one design, regulator+filter+lubricator, this device is more on the unique yet convenient side. Not only is it an air compressor for a water trap, but it also lubricates your tool with oil. So, your compressor stays working for a long time.


  • Good for housing needs
  • Auto drain
  • Multi worker
  • Built-in wall mount


  • Plastic fittings

3. Ingersoll Rand Water Separator – Best Air Compressor Water Separator for Painting

Ingersoll Rand Water Separator
  • Weight: 7.2 pounds

  • Dimension: 6.5 x 3.4 x 2.8 inches

  • Pressure Holding Capacity: 150 PSI

  • Material: Aluminum

  • Port Size: ¼ inch

If you have an air compressor with a maximum pressure of not more than 250, pick this up. Designed to be functional, this unit traps the water and solid particles in the best possible way. For oil removal, however, you’d need a separate model with coalescing filter for the air compressor.

Install with the regulator and a lubricator; you’ll see how efficiently it arrests water droplets. That will be evident on its walls. Don’t worry; the unit is quite easy to drain, considering the top and the bottom.

While the dryer fits the best for spray guns, it readily pairs with the other pneumatic tools to help them working leniently. Two years of warranty also make it reliable.


  • Easy to install
  • Usable with many tools
  • Reasonable price
  • Two years warranty


  • Fragile bowl

4. TAILONZ Air Filter – Best Automatic Water Separator for Air Compressor

TAILONZ Air Filter
  • Weight: 14.11 pounds

  • Dimension: 8.31 x 3.74 x 2.2 inches

  • Pressure Holding Capacity: 145 PSI

  • Material: Aluminum

  • Port Size: ¼ inch

Add another automatic air compressor water separator to the list: Tailonz. This water separator works well with airbrushes, spray guns, and many air tools. The best thing about it is that it comes with everything you need to get started, including tape.

While this unit is automatic, if you are a fan of manual dealing, you can attain that too. Manufacturers have other separators in stock. Although adjusting the knob is quite easy to operate, you’ll need some time to get familiar with it.

It comes with the fiber filter element, the drain valve positioned downwards, the gauge in the center, and the adjusting knob on top. One tip to have the gauge right is off-setting the gauge stem and turning it 90 degrees.


  • Works pretty well
  • Lenient price
  • Prevents leakage
  • Easy to put together


  • Gauge is hard to read

5. Mudder Water Oil Separator – Best Cheap Water Separator for Oil Compressor

Mudder Water Oil Separator
  • Weight: 9.6 pounds

  • Dimension: 3.54 x 1.97 x 1.97 inches

  • Pressure Holding Capacity: 90 PSI

  • Material: Aluminum, Polycarbonate

  • Port Size: ¼ inch

Possibilities are in no way limited for the water separator with a limited budget. Just like Mudder oil and water separator for air compressor. Although it’s best at filtering the air utmost, the system is manual.

Stay contented; it’s easy to deal with thanks to the polycarbonate glass walls. The visibility factor gives you right-hand information when it’s time to drain. To drain, push the release button, and the captured debris will come out.

While the lowest it can handle is 1-2 PSI, the highest it tackles is 90 PSI. The aluminum body with the brass fitting constitutes its larger life span. That means no periodical investment after this. Solid, liquid, or gas, the filter captivates every sort of contamination.


  • Captures every impurity
  • Able to connect to compressors directly
  • Large life span
  • Universal inlet size


  • Not as such

6. Creation Core Water-Oil Separator – Best Durable Water Compressor

Creation Core Water-Oil Separator
  • Weight: 7.5 pounds

  • Dimension: 6.3 x 6.1 x 2 inches

  • Pressure Holding Capacity: 4351 PSI

  • Material: Aluminum

Even though it’s an oil-water separator for an air compressor, you can also apply it with the air-operated pumps. So, it’s kind of a good deal when it comes to versatility. The package includes a kit of filter, separator, gasket, and a seal ring.

To cover the brass fitting, the manufacturers have coated it with aluminum. Indirectly that’s a promise for the larger life span. Additionally, it has dual-layered filtration, which works better than others.

Keeping attention to details, it comes with a sleek blue appearance. Originally, it’s marked as working best at 30 MPA, which converts to 4351 PSI. Fortunately, there are a lot of air guns you can plug it with on this rating.


  • High pressure holding capacity
  • Remove all impurities
  • Comes with spare filters
  • Cheap priced


  • Leaks from quick disconnects

7. Le Lematec AI303-C1 – Most Versatile Water Separator for Air Compressor

Le Lematec AI303 C1
  • Weight: 5.6 pounds

  • Dimension: 4 x 1.8 x 1.7 inches

  • Pressure Holding Capacity: 150 PSI

  • Material: Aluminum

  • Port Size: ¼ inch

Unlike other water separator makers, Le Lematec knows your concerns. So, it has indicated the flow direction on the unit to prevent any confusion while installation. Powder coating gun, paint gun, plasma cutter are the tools it works perfectly with.

With the pressure handling of 90 PSI to 150 PSI, it readily traps the water, oil, and dust from air compressors of different manufacturers. The inlet also constitutes this having ¼ inch port size, allowing universal compatibility.

Although manual, the drainage is pretty simple. Right at the bottom is a valve; all you need is to press it to expel every seized particle. With its brass fittings and aluminum cover, its durability is apparent.


  • Indication of flow direction
  • Reasonable price
  • Comes with a Teflon tape
  • Works pretty well, despite the position


  • Not as such

8. THB Water Trap Separator – Best Reliable Water Separator for Air Compressor

8.	THB Water Trap Separator
  • Weight: 14.9 pounds

  • Dimension: 7.91 x 3.23 x 3.23 inches

  • Pressure Holding Capacity: 175 PSI

  • Material: Aluminum

  • Port Size: ½ inch

Semi-automatic draining water filters for air compressors are rare, but they do exist. Peek the one from THB. It holds the moisture until the pressure is applied and waits for you to discard it. In other cases, it releases the trapped contents itself.

Other than this ½ inch filter, it also comes in the size of 3/8 inches. So, you can have one of your preferences and application. Not only is the product easy to use, but easy to install.

Know that the filter doesn’t get plugged directly in line with the air compressor. You’d need PVC connections and pipes to be bought separately. One feature to look at is that it leaks air through the side holes, sometimes.


  • Installation is simpler
  • Easy to operate
  • Traps good amount of moisture
  • Standard pressure hold


  • Leak air through side holes

9. FASTTOBUY Oil Water Separator – Most Well-Designed Water Separator

8.	THB Water Trap Separator
  • Weight: 7 pounds

  • Dimension:  7.52 x 5.63 x 1.3 inches

  • Pressure Holding Capacity: 4351 PSI

  • Material: Aluminum

Have you ever noticed the smell your water separator gives off? If yes, you won’t anymore, all thanks to this fasttobuy separator that makes sure to keep the nasty odors. It’s an air-water separator for air compressors and promises to keep your tools in good shape for longer use.

Made out of aluminum on brass, this dryer is quite thick. It performs well with a 99% accuracy rate and is not even less than any in looks. Besides blue, it also comes in gold which matches the brass and looks great when applied.

With its dual-layered fitting, the process of filtration is even smart. Also, it holds maximum pressure of 30 MPA or 4351 PSI, efficient enough for the high pressure of many air compressors out there.


  • Sturdy built
  • Excellent results
  • Best for high-pressure air compressors
  • One year warranty


  • The large diameter of the female end

Guide to Buy the Best Water Separator for Air Compressor

You never want to bet on an average or below-average product. But for that, a few essential steps need to be taken. Reading this section, for instance. It has all the ins and outs of the best water separator for an air compressor.

Also Read: 10 Best 12v Portable Air Compressor for Inflating Car Tires

Go through them and grab your waiting piece.

Draining System

Three types of water separators are visible when peeked in the category of drainage. The first is manual, and the rests are semi-automatic and automatic. As the name implies, manual water separators demand handwork and your involvement from time to time.

Semi-automatic release contaminants on their own once a level is reached. They excrete out the content trapped when no pressure is applied. Lastly, the automatic ones release and control the system all by themselves, freeing you from hassles.

Maximum Pressure Capacity

Check out the maximum pressure one can hold before sealing the deal for the best water separator for an air compressor. Out there are a lot, but the best from them is the one able to cope up 150 PSI or more.

For opting for yourself, compare the readings of your air compressor with the water separator. This way, you’ll get a subtle idea if one’s compatible with your compressor.

Built Material

Count on each part’s material to know if the filter would last you long. The Bowl material of your water separator should be metal, for instance. Other than that material, any other might not tolerate the high pressure from the compressors.

The inside of the filter should be brass, while the outer material of the filter must be aluminum. Aluminum is best at preventing corrosion and is a sign of the durability of a unit.

Inlet and Outlet Size

Without the compatibility of your water separator’s inlet and outlet size to the compressor, one’s of no use. That’s why your in-depth investigation of the port size is quite mandatory.

There is a lot you’ll come across. ¼ inches separator is mostly universal. So, you can avoid gambling and get straight to it. Otherwise, ½, ¾, 3/8 inches, and a lot of sizes are available out there. Hands down to anyone you think is fit for your needs.

Price and Warranty

Agreed, the water separators are usually cheaply priced; price should still not be overlooked. Always compare the price and features of one water separator with the other. Trust the only one offering more feasibilities of usage.

There are a few manufacturers that back their product with a warranty of a couple of years. Those are better to have, in one way or another. As these are to be claimed and so you can always stay worry-free before investing in.

5 Tips for Water Separator You Should Take Note

In our opinion, a few tips can help your water separator perform better. Also, they are helpful to keep your unit working for the seasons to come. So, we have positioned this section.

Skim through the tips and make the most out of your investment.

  • Cleaning before installation: When installing your water and air separator, always clean its parts. This quick cleanup will knock down every dust and dirt particle and keep the unit functioning smoothly.
  • Wrapping Tape: Folks who complain about the leakage never realize one mistake: Teflon tape wrapping. The tape wrapping around the separator port plays an essential part in preventing any leakages.
  • Leakage checks: Keep checking the leakage occurrences in your water separator. The sooner the issue will be arrested, the less damage will be made.
  • Drainage: Never let your water separator fill to the neck with the contamination if you have a manual. Drain it halfway. A fully loaded system can bring consequences your way.
  • Mounting: Keep in view the mounting instructions of the manufacturers. How and where one should be placed are the most important questions.

Frequently Asked Questions

Where to install water separator on air compressor?

There is a hose going along with the compressor gauge; insert your water separator in it and fix it. On the other end of the separator, fit in the long hose pipe, and that’s all.

What is the best water separator for an air compressor?

NEIKO 30252A is the best water separator for air compressors. It has a top-notch built with aluminum and comes with a ½ inch inlet size. This way, it is universal and gets paired with the majority of compressors out there.

Paint/spray guns, pneumatic tools, or sanders; if any of these have your usage, you can’t go wrong with this one. It is a moisture filter for the air compressor, and shot it off with a quick-release button at the bottom. Check out the above-detailed review for a more precise idea.

How long does a water separator on an air compressor last?

Marking an exact period of lasting for a water separator would be wrong. It relies on certain pointers like your usage and the unit’s capability to carry out the task. A general rule of thumb says that one can function for around 1,000 hours, but that depends on the above factors, respectively.


Myths are all around, and in them, one is that a water separator is optional for an air compressor. However, it isn’t. For allowing your air tools to stand tall, water separators play a major part.

It captures the moisture and prevents its successive flow with the air. So, today we presented the best water separator for the air compressor. Along with these, the tips are also working, so keep them in view.

Before leaving, do let us know if you have found one according to your match.