I woke up this morning to the sound of my water pipes shaking violently. So violently that I could feel the walls moving. The house was built around 10 years ago, and has water hammers.
Normally I would assume this is a water hammer problem, but it didn't happen when water was turned off, or anything else. No water in the house was running, and the shaking went on for at least an hour. The only way I could stop it, was by turning on the cold water to the room where the shaking occurred. I've now turned the water off to the house.
Things I've tried
I tried turning off the water to the house, draining all the pipes, and after turning the water back on, slowly turning the ports closed starting from the end of the line to the front (slowly)
Screaming at my wall.
Things I thought could be the problem
Maybe the water hammer, but I thought that only happened if you turned off water quickly or didn't have water hammers in the house. I have those water hammer valves in several places in the house.
Just a loose pipe. This is a real possibility since my builder of my house was terrible and I can hear that pipe shaking around like crazy. But can just a loose pipe cause this? I would think that it shouldn't try to shake that violently whether it was loose or not, and why now?
I've googled the water pressure could be too high, but that's definitely not it. Our water pressure in our neighborhood is always low.
Once again, this isn't a knocking that happens for a few seconds after I turn off the water. This is a violent vibrating that happens all the time unless the cold water is turned on in the room where the vibrating is the loudest.
After leaving the water off for a long time, and re-draining all the pipes, it looks like now it's acting more like a water hammer issue and only shakes right after I cut water off.
Now it appears to have stopped and I can't reproduce it. Maybe air in the line or something crazy? Ghosts?