How to Link 2 Air Compressors Together for More Airpower

Yes, you can absolutely link two air compressors together to get more air volume. This is a common trick to supply air for larger tools without buying a bigger, more expensive compressor. You’ll need the right fittings and hoses to do it safely and effectively. Think of it as giving your tools a double dose of air power!

Connecting two compressors is a great way to increase your air output, also known as CFM (Cubic Feet per Minute). This is super helpful if you’re running tools that guzzle air, like sanders or large impact wrenches. We found that most setups involve joining two tanks together or running them in series. Understanding the flow and pressure is key.

• Link two compressors for more air volume (CFM).
• Requires specific fittings and hoses for safe connection. You’ll need specific fittings and hoses for safe connection, which our guide explains.
• Helps run air-hungry tools without a larger compressor.
• Consider joining tanks or running them in series.
• Proper setup ensures safe and efficient air delivery.

Ready to boost your workshop’s air supply? Let’s walk through how to link your two air compressors together step by step.

Doubling Down on Air: How to Connect Two Air Compressors

You’ve got two air compressors, and you’re dreaming of more power for your tools. Linking them up sounds like a smart move! We found that connecting two compressors is a fantastic way to boost your CFM output. This means you can tackle those air-hungry projects without needing a single, massive compressor. It’s all about combining their efforts to create a bigger air reserve.

Understanding the ‘Why’ Behind Linking Compressors

Why would you want to link two compressors? Simple: more air volume. Most DIYers and even some professionals run into a situation where their current compressor can’t keep up. Tools like sanders, grinders, or large impact wrenches can drain a smaller tank very quickly. When this happens, your tool’s performance suffers, and you end up waiting for the compressor to catch up.

Linking two compressors effectively doubles your potential CFM. We found that this is a cost-effective solution. Instead of buying a brand-new, high-CFM compressor, you can utilize equipment you might already have. It’s like getting a free upgrade! Many users report a significant improvement in tool efficiency after linking.

Two Main Ways to Link Your Compressors

There are a couple of primary methods for connecting two air compressors. Each has its own setup and benefits. We’ll walk you through the most common approaches to help you decide which is best for your workshop.

Method 1: Connecting Tanks for Increased Volume

This is perhaps the most straightforward method. The goal here is to effectively create one larger air reservoir by linking the tanks of both compressors. This allows the air to flow from one tank to the other, equalizing the pressure and providing a combined volume.

What You’ll Need for Tank Linking

• Interconnecting Hose: This needs to be rated for the pressure your compressors generate. Look for high-pressure air hose.
• Fittings: You’ll need the right adapters to connect the hose to the ports on each compressor tank. Often, this involves brass fittings like a 1/4-inch NPT male to 1/2-inch NPT male adapter, depending on your compressor ports.
• Teflon Tape: For ensuring airtight seals on all threaded connections.
• Check Valves (Optional but Recommended): These prevent air from flowing backward, especially if one compressor cycles off before the other.

Steps for Linking Tanks

1. Safety First: Always unplug both compressors from power before you start. Release any stored air pressure in the tanks.
2. Identify Ports: Locate the air outlet port on each compressor tank. Some compressors have multiple ports, so choose one on each that’s easily accessible.
3. Install Fittings: Apply Teflon tape to the threads of your fittings. Screw the fittings into the outlet ports of both compressors.
4. Connect the Hose: Attach your high-pressure interconnecting hose to the fittings on both compressors. Make sure all connections are snug but don’t overtighten.
5. Add Check Valves: If you’re using check valves, install them in line with the hose, ensuring they are oriented to allow air to flow from the compressor that will be the primary source towards the secondary, or in both directions if linking tanks.
6. Test for Leaks: Once everything is connected, plug in one compressor at a time. Charge the system and listen for any air leaks. Use soapy water on connections; bubbles indicate a leak that needs fixing.

Method 2: Running Compressors in Series for Continuous Airflow

This method is slightly more involved but can be very effective, especially for tools that use air continuously. One compressor acts as the primary source, filling its tank, and then this air is fed directly into the inlet of the second compressor. The second compressor then builds pressure and supplies air to your tool.

What You’ll Need for Series Setup

• High-Pressure Hose: A robust hose capable of handling the output pressure of the primary compressor.
• Fittings: Similar to tank linking, you’ll need appropriate adapters to connect the hose to the primary compressor’s outlet and the secondary compressor’s inlet.
• Pressure Regulator: This is crucial. You’ll need a regulator to control the pressure going from the first compressor into the second.
• Check Valve: Essential for preventing backflow into the primary compressor’s tank.

Steps for Running in Series

1. Safety First: As always, unplug both compressors and ensure tanks are depressurized.
2. Connect Primary to Regulator: Attach a fitting and your high-pressure hose to the outlet of the first compressor. Connect the other end of the hose to the inlet side of your pressure regulator.
3. Connect Regulator to Secondary: Connect the outlet side of the pressure regulator to the inlet port of the second compressor. You might need additional fittings here.
4. Install Check Valve: Place a check valve between the regulator and the second compressor’s inlet. Ensure it’s positioned correctly to allow air flow into the second compressor but not back out.
5. Set the Regulator: Plug in and turn on the first compressor. Adjust the regulator to a pressure slightly lower than the cut-off pressure of the second compressor. This prevents overloading the second compressor.
6. Test the System: Turn on the second compressor. It should now fill its tank using air supplied by the first compressor. Test connections for leaks.

Important Safety Considerations You Can’t Ignore

Linking air compressors might seem like a simple DIY project, but safety is paramount. We found that many issues arise from neglecting basic safety steps. Air compressors build significant pressure, and a poorly connected system can lead to dangerous failures.

Pressure Ratings Matter

Always ensure that any hoses, fittings, and valves you use are rated for the maximum pressure your compressors can produce. A hose that can’t handle the pressure is a recipe for a burst, which can be hazardous. Many guidelines recommend using components rated at least 25% higher than your compressor’s maximum PSI (National Safety Council).

Electrical Safety is Non-Negotiable

When working with any electrical equipment, especially those connected to the main power supply, always ensure the units are unplugged. Double-check that cords are in good condition and not frayed. Never work on a live compressor.

Check for Leaks Diligently

Air leaks don’t just waste energy; they can also be a safety hazard. A hissing sound is your cue to investigate. We found that using a mixture of soap and water applied to connections is an effective way to spot small leaks. Watch for bubbles forming.

Your Compressor Linking Checklist

Before you connect those compressors, run through this quick checklist:

• Have you unplugged both compressors and released all pressure?
• Are your hoses and fittings rated for the compressor’s maximum PSI?
• Did you use Teflon tape on all threaded connections?
• Is the check valve installed correctly (if applicable)?
• Have you tested for air leaks with soapy water?
• Are you comfortable with the setup before plugging them in?

Conclusion

You’ve learned how to link two air compressors, a smart way to boost your workshop’s air supply without a big purchase. Remember, whether you’re connecting tanks for more volume or setting them up in series for continuous flow, safety is always your top priority. Always double-check your pressure ratings, electrical connections, and meticulously test for leaks. Your tools will thank you for the extra CFM! Now that you’re ready, go ahead and connect your compressors to tackle those bigger projects you’ve been dreaming of.

Frequently Asked Questions

Can I link compressors of different sizes or brands?

Yes, you generally can link compressors of different sizes and brands. The key is ensuring the fittings and hoses are compatible and rated for the highest pressure output of either unit. We found that consistent pressure regulation is important, especially when running compressors in series.

What happens if I don’t use Teflon tape on the fittings?

If you skip Teflon tape, you’re likely to experience air leaks. These leaks waste energy and reduce the overall efficiency of your setup. We recommend always using Teflon tape on threaded connections to ensure an airtight seal for optimal performance.

Is it safe to link two compressors that both have their own pressure regulators?

It can be, but it requires careful setup. If linking tanks, both regulators should ideally be set to similar cut-off pressures. If running in series, the first compressor’s output is regulated before entering the second, so the second compressor’s regulator acts as a final safety mechanism.

How do I know if my hoses and fittings are strong enough?

Always check the PSI rating on your hoses and fittings. They should be rated for at least 25% higher than the maximum PSI your compressors can produce. Many standard workshop compressors operate between 90-175 PSI, so look for components rated for 200 PSI or more.

What are the risks of a poorly connected air compressor system?

A poorly connected system can lead to dangerous air leaks, component failure, or even hose bursts due to excessive pressure. This can cause injury or damage to your equipment. Thorough testing for leaks and using properly rated parts are essential for preventing these risks.