I think you need to get to the bottom of the water hammer. Check the local pipe strapping (if you can), have a good look at the stops and check the pressure on the system.No I didn’t think of that honestly, but I will keep that in mind in the future.
This customer was a really pia. Really particular in where I set my tools, running water “excessively”, etc. I pretty much got as much info as I could to find parts and got out of there. I got the two stems and I also got a new valve body for the left side. So we will see what happens.
Side note, has anyone before had water hammer or loud whistling coming from a faucet like this? What was happening was when the hot side turned on it would start thumping and then start whistling loud until the cold side was opened up a little. This is the only faucet doing it, no recirculating system, 50 gallon tank feeding this part of home, shut offs under sink are new. I figured it was the stems wearing out. They were dripping a bit when i got there.
I will usually replace the stops when I replace a faucet, but it might be a good idea to replace them in this case anyway. I 100% agree with Skoro above.
I have also seen debris in the stop cause similar issues.
Many times, I’ve gone through peoples homes and pointed issues out like stops (old compression stops) and pulled out a WB 1/4 turn stop and let them hold it, then show them an old compression stop from what ever it was I had been working on. At that point (provided it ACTUALLY needs to be done) suggest replacing every stop in the house. Sometimes they go for it, sometimes not. But it’s a nice upsell and the clients like it.