Why is my pump making so much noise?

Why is my pump making so much noise?

In order to move forward to your case, could you please kindly help us confirm the following information?
1. Where is the noise coming from?
2. Motor: Turn on the gun to see if the sound will be smaller.
If convenient, could you please kindly help us take a short video or photos to confirm in detail ? And the send the video to the email address support@brearo.com.
Once the above information provided, we will do our utmost to provide a good solution for you.
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