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Question DetailsAsked on 5/16/2015

pipe hammering after replacing toilet fill valve

replaced toilet fill valve. when opening water pipe valve to fullest, pipe starts vibrating

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1 Answer


Could be new fill valve lets more flow in, and you have a chattering shutoff valve. Try closing and reopening the shutoff valve while the toilet is refilling the tank - could be some air in there. Also make sure the valve is open all the way, and that the fill tubing to the tank is not kinked. (But be aware with older metal spiral type tubing, especially if any green corrosion on it, bending it around can cause a leak or even breakage). Also, could be air in the fill valve causing vibrations through the water column - flush several times to see if it stops as air bleeds out with the incoming water.

If that does not solve it, assuming you have listened with your ear to it so you know it is the shutoff valve and not the fill valve, then you have two choices - replace the shutoff valve, or close it partway down till it stops humming. The former about $75-150 typcically (minimum visit charge) plus about $10 materials, the latter will probably work but take tank longer to fill, and will eventually eat away at the valve so when you go to shut if off in the future it may leak somewhat.

Answered 5 years ago by LCD

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