It seems that plumbing in my house has a problem with water hammer. First, I thought it only occurs when toilet tanks are filling back with water, but I realized that it happens whenever water is used anywhere in home. It just that water hammer is not as bad when I use faucets. So I’ve been trying to figure out where or source of this water hammer. By listening to where the sound is coming from, and by touching the water pipe with my finger tips, I learned that sound is loudest where the main water pipe comes in through the concrete wall. I guess I can install a water hammer arrestor. But I am trying to understand why water hammer is occuring. Here is my guess. Please let me know what you think. There is a branch near this point where pipe leads out to the faucet outside the house. While water tries to flow further into the house, perhaps vacumm is being created in this branch pipe and causing water hammer. Is this possible? What do you think? Thanks!
1. Noise comes from pipes near water main, not the toilets. noise just louder with toilets, reduced intake valve and reduced noise
2. With my fingertips, I can feel the pipe vibrating.
3. Perhaps water traveling to water softner and bouncing back?
4. Checked diaphram valve on toilet, it looked fine.
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I guess I’ll just install couple water arrestors and see what happens…
