Good afternoon, I'm new here... I have a new house and the outside faucet pulsates when I slowly turn it on, so much so that it makes a loud thumping noise. I have to open the faucet a least half way to get rid of the pulses. If I turn down the faucet it will go to a certain point and then pulsate again until turned off. My outside faucets have the anti-back flow adapters on them, I thought that they might be faulty and replaced, but still pulsates. So I tried the faucet with out one and it still pulsates, just not as bad.

Any help or ideas would be appreciated.

Thanks

Sorry I cannot give you a professional plumber's response but it may be helpful
For you to believe there is AIR bubble in your water line... it is the same thing'
As sometimes happens to any inside water outlet. Suggest you just ask a
Reliable plumber how to get an air bubble out of your water line.