The hose has cracked
A hose typically develops a hole for one of two reasons: external wear or damage that removes the outer layer and causes the steel reinforcement to rust, or frost that splits the hose.
The advantage of steel-reinforced hoses is that they can be easily repaired or spliced. If the hose has a small crack, you can have a short section cut and spliced at the nearest hose workshop. This process is often completed in a few minutes and cheaply. However, if you have a fiber-reinforced hose with a hole, it will likely need to be replaced.
Rust/corrosion
Mild rust on the hose coupling is usually just an aesthetic issue and doesn't cause functional problems. The coupling must have reduced functionality to cover the damage under warranty. If the coupling corrodes past the o-ring, it may lead to leakage, leaving you with two options:
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Replace the hose coupling. A new coupling can be ordered from our online store and fitted at your local hose workshop.
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Replace the hose.
Leakage from the coupling
Press the trigger grip once to release pressure, then disconnect the gun from the hose. Inspect the o-ring (1) at the end of the hose. If it appears intact and undamaged, it is likely still sealing properly. A damaged o-ring will show visible breaks or wear.
If the o-ring on the hose is intact, the issue may be a crack in the internal pipe of the gun. You can open the screws on the gun's casing to check the pipe for cracks.
New o-rings are available in the AVA First Aid Kit, sold at most AVA retailers.
O-rings are considered wear-and-tear items and are therefore not covered under warranty.