When we turn on the hot water in our upstairs bathroom, either the sink or shower. The pipe will start a steady knock approx. every 5sec. I know its not "water hammer" but not sure what and how to correct it. FYI we are also on a well supply.
It happens more being on a well. Air in the water will collect in pockets in the pipes and in the top of the water heater. When the air comes out the sudden burst of air causes the pipes to shake hitting the places where it's a little loose.
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