12 Years Factory wholesale PB Elbow 90° to Bolivia Factories

12 Years Factory wholesale
 PB Elbow 90° to Bolivia Factories

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  • Residential humming/vibrating noise in plumbing pipes. The vibrations are about 40 cycles per second and hard to hear in the video. (There is more info below – click ‘show more’)

    I checked the water pressure at the garden hose and it is 80 psi, which is precisely what our water authority recommends.

    All comments and suggestions graciously accepted. Thanks

    *** The humming was caused by a bad PRV (Pressure Reduction Valve).
    *** Here is a helpful video: https://www.youtube.com/watch?v=zdd7mEYNBVE
    *** When the PRV was replaced, the humming went away (for good).

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