I have knocking in my pipes, not sure what is causeing this... Tried opening up water valves to relieve some pressure... didn't help

Hi cd and welcome, if you look at Similar Threads just to the right of this page you may find your answer, if not post back with more info, like type of plumbing, well or city water? Any plumbing work performed recent? Water pressure? Good luck

Opening and closing valves does not change the pressure. We need a more detailed description of when you hear the noise and if it is preceded by a fixture being used?