Install Oil Water Separator on Air Compressor: Step-by-Step

Installing an oil water separator on your air compressor is a straightforward process that keeps your equipment running smoothly. You’ll typically connect the separator between the compressor tank and your air lines. This setup effectively removes oily water before it can cause problems. Many users find this a practical upgrade for cleaner air.

Why bother with this little device? Because compressed air often carries moisture and oil. Without separation, this mixture can damage tools and create messes. An oil water separator is a smart investment for maintaining tool longevity and air quality. We found that proper installation makes a big difference in performance.

• Oil water separators remove moisture and oil. Oil water separators remove moisture and oil, and you can even build your own water trap for an air compressor.
• They connect between the compressor tank and air lines.
• Proper installation protects your tools.
• It’s a practical upgrade for cleaner air.
• Installation is generally a simple DIY task.

Let’s walk through exactly how to install your oil water separator step by step to ensure you get the most out of this helpful component.

Setting Up Your Oil Water Separator for an Air Compressor

Adding an oil water separator is a smart move. It helps clean up your compressed air. You’re looking to install it between your compressor’s tank and the air lines. This placement is key to capturing oily water. We found that it significantly improves air quality.

Why Install an Oil Water Separator?

Your air compressor naturally produces moisture. It also often carries oil mist from the compressor’s internal workings. Without separation, this oily water can travel through your air lines. It can then damage your valuable tools and equipment. Think of it like rust forming inside your pneumatic tools. This can lead to costly repairs and premature failure. Many industrial hygiene guidelines recommend removing oil mist from compressed air, especially for breathing air applications (CDC).

Protecting Your Tools and Equipment

Water and oil are the enemies of pneumatic tools. They can cause corrosion and gum up moving parts. A separator acts as a filter. It stops this harmful mixture before it reaches your tools. This means your air hammers, impact wrenches, and spray guns will perform better and last longer. We’ve seen user reports where tool life doubled after installing one of these separators.

Improving Air Quality

Beyond tool protection, cleaner air is just better. If you use your compressed air for painting or other sensitive applications, oil can ruin your finish. For breathing air, it’s a health and safety requirement. Even for general workshop use, it reduces mess and makes for a more pleasant working environment. Many safety standards stress the importance of clean, dry air for various uses (OSHA).

Choosing the Right Location for Installation

Where you install the separator matters. The most common and effective spot is after the compressor’s storage tank. This allows the air to cool down a bit. Cooler air holds less moisture, making the separator’s job easier. You want it in a place that’s accessible for maintenance. You’ll need to drain it regularly.

Post-Tank Placement Advantages

Placing it after the tank means the air is already somewhat dried and cooled. The tank acts as a buffer. This setup usually offers the best performance. It also protects the separator from the high heat and pressure directly from the compressor head. We found that this is the most recommended configuration by manufacturers.

Accessibility for Draining

Your separator will need periodic draining. Some have manual drain valves, while others have automatic float drains. Regardless, you need to be able to reach it. Don’t put it in a cramped corner where you can barely get a hand in. Easy access makes it more likely you’ll perform the necessary maintenance.

Tools and Materials You’ll Need

Gathering your supplies beforehand makes the job go smoothly. You’ll typically need a few basic tools. Most installations are pretty straightforward. You won’t need specialized equipment for this task.

Essential Tools Checklist

• Adjustable wrench or pipe wrench
• Pipe thread sealant tape (PTFE tape)
• New fittings if needed (check your separator’s inlet/outlet size)
• A drain pan or bucket for residual water
• Safety glasses and gloves

Understanding Your Separator’s Connections

Most oil water separators have threaded pipe connections. Common sizes are 1/4-inch, 3/8-inch, or 1/2-inch NPT (National Pipe Thread). Check the specifications for both your compressor tank outlet and your separator’s inlet and outlet. You might need adapters or reducers. Ensure all threads are clean and free from damage before connecting.

Step-by-Step Installation Guide

Let’s walk through the actual installation. Remember, always disconnect power to your air compressor before starting any work. Safety first!

Step 1: Shut Down and Depressurize

Turn off the power switch for your compressor. Then, open the drain valve on your storage tank to release all the stored air pressure. Wait until all air has escaped. This is a critical safety step. You don’t want any pressure fighting you.

Step 2: Disconnect Existing Piping

Locate the outlet port on your air compressor tank. You may have a hose or pipe connected here. Use your wrench to carefully loosen and remove this connection. Be prepared for a small amount of residual water to drain out. Use your drain pan for this.

Step 3: Prepare and Connect the Separator

Apply PTFE tape to the male threads of the fittings you will use to connect to the separator. Wrap it clockwise. This helps create a tight seal. Screw the appropriate fittings into the inlet and outlet ports of your oil water separator. Ensure they are snug but don’t overtighten.

Step 4: Install the Separator

Connect the inlet side of the separator to the compressor tank outlet. Use your wrench to tighten the connection. Next, connect your existing air line (or a new one) to the outlet side of the separator. Tighten this connection securely. Make sure the separator is oriented correctly, usually upright, as per the manufacturer’s instructions. Next, connect your existing air line to the outlet side of the separator, and our guide covers the best air compressor hose sizes.

Step 5: Test for Leaks

Once everything is connected, turn the power back on to your compressor. Let it build pressure. Listen carefully for any hissing sounds, which indicate air leaks. You can also use a soapy water solution; spray it on the connections. Bubbles will form where there are leaks. Tighten connections as needed. We found that a thorough leak check is essential.

Step 6: Regular Draining and Maintenance

This is not a “set it and forget it” device. You must drain the collected water regularly. Check your separator’s manual for the recommended frequency. Most require draining daily or weekly, depending on usage and humidity. A neglected separator can overflow and defeat its purpose. Many users find a simple checklist helps them stay on track.

Maintenance Checklist Example

• Check separator daily for water level.
• Drain separator daily or as needed.
• Inspect for leaks weekly.
• Clean or replace filter elements if applicable (refer to manual).
• Verify automatic drain function if equipped.

Conclusion

You’ve successfully learned how to install an oil water separator for your air compressor. This straightforward upgrade is a smart investment for anyone serious about protecting their tools and ensuring clean air. By connecting it between your compressor tank and air lines, you’re actively preventing damage and improving performance. Remember, consistent draining and maintenance are key to its effectiveness. Now that you’re set up, make it a habit to check and drain your separator regularly to get the most out of your compressed air system.

Frequently Asked Questions

What happens if I don’t install an oil water separator?

Without an oil water separator, the moisture and oil present in your compressed air will travel directly to your tools. This can lead to rust, corrosion, and gummed-up parts within pneumatic tools. Over time, this will reduce their lifespan and lead to costly repairs.

Can I install the separator anywhere in the air line?

While you can technically install it anywhere, placement after the compressor tank is highly recommended. This allows the air to cool, which makes the separator more efficient at capturing moisture. Placing it immediately after the tank also protects the separator from extreme heat and pressure.

How often do I need to drain the separator?

The frequency of draining depends on your usage and the humidity in your environment. Many manufacturers recommend draining daily, especially if you use your compressor frequently. For lighter use, checking and draining weekly might suffice. Always consult your separator’s manual for specific recommendations.

What if my separator has an automatic drain and it’s not working?

If you have an automatic float drain and suspect it’s not functioning, it’s important to check it. Sometimes the float mechanism can get stuck. You may need to manually drain the separator and investigate the float assembly. A faulty automatic drain means you’ll need to revert to manual draining until it’s fixed.

Can I use regular plumbing tape for the pipe threads?

It’s best to use PTFE (Teflon) tape specifically designed for pipe threads. This tape creates a reliable seal against air and moisture leaks in pneumatic systems. Regular plumbing tape might not hold up as well under the pressures and conditions found in compressed air lines, potentially leading to leaks.