u/GSUS969

I'm getting a knock or two after some plumbing work was done for a renovation. Prior to this, we did not have any knocking of any kind. I'm curious if any of the experts out there can help me diagnose this from afar. This plumbing is for a master bathroom above this. But, I get the knocks on near the open area in images 2 & 3. So far, here's what I've personally done to address this issue:

• Secure obviously loose pipes. I did this in the basement as well in case that was somehow the cause.
• Turned off the main water valve and drained the lines by opening faucets, tubs, showers, etc. Then turn the valve back on and let the system pressurize.
• I've installed mini water hammer arrestors on the upstairs fixtures (sinks and toilet)

One thing to note, the noise I hear is localized to this area. But, I now get it from flushing a toilet in another bathroom as well as using a washing machine (both located on the other side of the house).

Thank you!

I'm getting a knock or two after some plumbing work was done for a renovation. Prior to this, we did not have any knocking of any kind. I'm curious if any of the experts out there can help me diagnose this from afar. This plumbing is for a master bathroom above this. But, I get the knocks on near the open area in images 2 & 3. So far, here's what I've personally done to address this issue:

• Secure obviously loose pipes. I did this in the basement as well in case that was somehow the cause.
• Turned off the main water valve and drained the lines by opening faucets, tubs, showers, etc. Then turn the valve back on and let the system pressurize.
• I've installed mini water hammer arrestors on the upstairs fixtures (sinks and toilet)

One thing to note, the noise I hear is localized to this area. But, I now get it from flushing a toilet in another bathroom as well as using a washing machine (both located on the other side of the house).

Thank you!