Humming and Vibrating from 1 year old A.0. Smith Water Heater

Humming and Vibrating from 1 year old A.0. Smith Water Heater

by Mya Berger
(Edmonton Alberta Canada)

We never had this noise before but recently out hot water heater (A.O. Smith Model#GPD 40100)starting making a humming noise and which is sending a vibration through our home. The plumbers who installed it did a courtesy call today and what he ended up finding that there was no vibration on the right side where the cold water pipe is but the hot water pipe going into the hot water heater that is vibrating and then from there the pipes go up to the header and from there it is sending the vibration to the rest of the house. He put some rubber between the pipe and the header and this has lessened it somewhat but still does not solve the problem.

Why it is all of the sudden vibrating when it never did before? Can you give some insight into why this would be. Also the pipes going into the hot water heater are the copper accordion type. I read on the net sometime this pipe can cause the vibration, but still wouldn't explain why we never had it in the first place. Any help or suggestions would be much appreciated. Thank-you

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Jan 16, 2016
loud humming from AO Smith water heater
by: Anonymous

Brand new AO Smith 50 gallon water heater sounds like a 747 landing in the house...AO Smith service rep came out and made the problem waiting for plumber that installed it to see what is the problem...and waiting for Smith service rep to come out a second time...almost ready to chuck the lemon and go tankless... :(

Sep 30, 2015
Brand New AO SMITH Hot Water Heater Noises
by: Anonymous

I have an AO Smith Hot Water Heater that was installed less than 2 months ago. Since right after installation, I have been getting random loud humming and vibration.

Dec 04, 2010
water heater nipples
by: tightspotvacuum brush

do you have galvanized nipples on the hot and cold water connections of your water heater. if the inside of the galvanized nipples have a blue plastic sleeve there will be a black rubber flapper. remove the black rubber flapper. sometimes they vibrate when water flows threw them.

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