My cold water pipe shake and make loud knocking noise when turn on the water or flush the toilets. I tried to bleed air from the entire house (shut off the main water valve from the street, completely drain all water out of all faucets, released the little screw cap in the water line, which feed the outside garden faucets, in the basement of to let water out.
I then slowly turned back on the main water valve, allow water to flush the garden faucets, then turn back on other faucets. I still have pipe shake problem. Later I found out that when shaking occurs, I could reduce or eliminate it by shutting off the valves in the basement (which feed the outside garden faucets).
Any suggestion? Please advise. Thank you.