GCEMIDIL It is really hard to discern what is loud over a video taken on a phone, welcome to the world of software compression. If I whisper directly into a microphone….it still sounds loud..
The pump is about the same level of noise as my sink faucet turned on. It runs for roughly a second and then is off the rest of the shot. The discharge of the three way valve is louder than the pump in my opinion.
Here is a video I had taken in the past -