Quick Answer

If your 50L air compressor is experiencing pressure problems, the most common causes are air leaks, a loose drain cock, worn seals or gaskets, an incorrectly adjusted pressure regulator, or a faulty quick coupling. This guide will help you identify the issue and determine the appropriate next steps.

Tip: Always disconnect the compressor from the mains power supply and release any air pressure before inspecting hoses, fittings or seals.

Before You Begin

For your safety:

• Switch the compressor off.
• Disconnect it from the mains power supply.
• Fully depressurise the air tank.
• Allow the compressor to cool before carrying out any inspections.

Problem 1: The Compressor Is Not Building Pressure

If the compressor runs but the tank pressure does not increase, there may be an air leak within the system.

Check the Gaskets and Seals

Inspect all accessible seals and gaskets for:

• Cracks.
• Splits.
• Wear.
• Damage.
• Poor seating.

A damaged gasket can allow compressed air to escape, preventing the tank from reaching full pressure.

Replace any damaged seals before using the compressor again.

Check the Drain Cock

Ensure the condensed water drain cock underneath the air tank is fully closed.

If the drain cock is loose or partially open, compressed air will escape continuously.

Tighten the drain cock securely before restarting the compressor.

Problem 2: The Tank Builds Pressure but the Air Tool Doesn't Work

If the tank pressure gauge shows pressure but your pneumatic tool is not operating, check the following.

Check the Air Hose

Inspect the air hose and fittings for leaks.

A simple way to locate leaks is to:

1. Mix a small amount of washing-up liquid with water.
2. Apply the solution to the hose connections.
3. Watch for bubbles forming while the system is pressurised.

Bubbles indicate escaping air.

Replace any leaking hoses or fittings.

Important: Never use damaged pneumatic hoses.

Inspect the Quick Coupling

Check that:

• The quick coupling locks securely onto the air tool.
• There are no audible air leaks around the coupling.
• The coupling is free from damage.

If the quick coupling is leaking, it should be replaced.

Check the Pressure Regulator

Ensure the pressure regulator is set high enough for the connected pneumatic tool.

To increase the regulated pressure:

• Turn the pressure regulator clockwise.

If the pressure is set too low, the air tool may not operate correctly.

Problem 3: The Compressor Does Not Stop Running

Normally, the compressor automatically switches off once the maximum tank pressure has been reached.

If the compressor continues running and the safety valve begins releasing air, this may indicate an internal fault.

Unfortunately, there are no user-serviceable adjustments for this condition.

Important: Stop using the compressor and disconnect it from the power supply.

Please contact our Customer Support team for further assistance.

My Compressor Is Still Having Pressure Problems

If the issue remains after completing the checks above:

• Check all hose connections.
• Ensure the drain cock is fully closed.
• Inspect the pressure regulator.
• Replace any leaking seals or quick couplings.
• Listen for escaping air around the compressor.

If you are unable to identify the cause, please contact our Customer Support team for further assistance.

Frequently Asked Questions

Why won't my compressor build pressure?

The most common causes are air leaks, a loose drain cock, or damaged seals or gaskets allowing compressed air to escape.

Why is there pressure in the tank but my air tool won't work?

Check the pressure regulator setting, air hose, quick coupling and hose connections for leaks or blockages.

How can I find an air leak?

Apply a mixture of soapy water to hose connections and fittings while the system is pressurised. Escaping air will create bubbles.

Why won't my compressor switch off?

If the compressor continues running after reaching maximum pressure and the safety valve releases air, the pressure control system may be faulty. Stop using the compressor and contact Customer Support.

Can I repair leaking seals myself?

Damaged seals and gaskets can usually be replaced if suitable replacement parts are available. If you are unsure, contact our Customer Support team before carrying out repairs.