Hi,
If you are certain the leak is between the hose and the connector, remove the hose and inspect the brass tube for damage or corrosion. If there is corrosion, make sure to clean it off. If it's bent or damaged, try your best to repair it.
Now, the one thing you could try is using a high-pressure hose clamp. The worm clamp you are using can allow a section of the hose to not be secure enough. A high-pressure clamp tightens evenly, 360 degrees.
See pic below.
Let me know if you have other questions.
Take care,
Joe
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Friday, October 29th, 2021 AT 10:22 PM