My Cordless Pressure Washer is leaking from the gun/hose connection

Quick Answer

If your cordless pressure washer is leaking where the hose connects to the spray gun, the connection may not be fully secured, the hose O-ring may be missing or damaged, or the spray gun itself may be faulty.

In most cases, reconnecting the hose correctly or replacing the O-ring will resolve the issue.

Before You Start

Before inspecting the pressure washer:

• Switch the pressure washer off
• Remove the battery
• Turn off the water supply
• Squeeze the trigger to release any remaining pressure

Important: Never disconnect the hose while the system is still pressurised.

How to Fix a Leak from the Gun or Hose Connection

Follow these steps to identify the cause.

1. Check the hose connection

Inspect where the high-pressure hose connects to the spray gun.

If your model uses a push-fit connection:

• Push the hose fully into the spray gun
• Twist it until it locks securely into place

If your model uses a threaded connection:

• Check that the threaded collar is tightened correctly
• Inspect the screw cap for signs of damage or cracks

A loose connection is one of the most common causes of leaks.

2. Inspect the O-ring

Check the end of the hose for the rubber O-ring.

Depending on your model, this may be:

• Red
• Black

Ensure the O-ring is:

• Present
• Undamaged
• Properly seated in its groove

If the O-ring is missing or damaged, it will need to be replaced.

3. Check the spray gun

If the hose is securely connected and the O-ring is in good condition, the spray gun may be faulty.

A damaged internal seal can allow water to leak from the hose connection during use.

In this case, the spray gun will require replacement.

Replacement Parts

If your machine is within its warranty period:

• Replacement O-rings and spray guns can be supplied free of charge under the terms of your warranty.
• Please contact our customer service team via Live Chat or submit a support ticket to arrange the replacement.

If your machine is outside its warranty period:

• Replacement O-rings and spray guns can be purchased through our website.

Important Maintenance Tips

• Ensure all hose connections are fully locked before use
• Inspect the O-ring regularly for signs of wear
• Replace damaged O-rings promptly to prevent leaks
• Avoid overtightening threaded fittings
• Store hoses and accessories carefully to prevent damage

Frequently Asked Questions

Why is my pressure washer leaking where the hose connects to the spray gun?

The most common causes are a loose hose connection, a missing or damaged O-ring, or a faulty spray gun.

How do I know if the O-ring is missing?

Inspect the end of the hose for the red or black rubber O-ring. If it is missing or damaged, it should be replaced.

Can I get a replacement O-ring?

Yes. If your pressure washer is within warranty, we can supply a replacement free of charge. If it is outside warranty, replacement O-rings can be purchased from our website.

What if the O-ring is still fitted but the connection leaks?

If the O-ring is in place and the hose is connected correctly, the spray gun may be faulty and require replacement.