We just replaced our bathroom faucet with another Delta single handle model. It works fine, except when the water is turned on half way, with the handle in the middle set to warm water, it is really loud. It is not water hammer, it just sounds like lots of water is going through it -- same sound a shower faucet would make when turned on full blast.

When the faucet is turned on all the way, the lound noise gets quiet and goes to a normal level. And if it's half way on and the handle is turned fully to hot or cold, then the sound goes to a normal level, too. So it only happens when the faucet is half way on, and set to warm water.

The sound is loud enough that it can wake you up when sleeping on the next level up.

Does this sound like a faulty valve in the faucet? Our previous faucet wasn't this noisy. One thing I noticed about this faucet is that the handle is really easy to move up and down, moreso than on other faucets.

Any ideas on how to fix it? Thanks for any advice you may have!



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You try opening the shutoff valves under the sink all the way? Sometimes if they are halfway open things get noisy

Thanks for the tip. Yup, those are quarter turn shut off valves and are open all the way.



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