I have a Price-Pfister 533 Genesis single handled kitchen faucet that turns itself off. It is impossible to run water at a low volume because the moment your hand is off the handle it shuts off.
How can I fix this?
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Pfister is so aware of this problem they have a video on the problem http://www.pfisterfaucets.com/about/falling_handle.aspx
Turns out they made a faucets with heavy metal handles but cheap plastic internal parts... after a few years they fail. I called up customer service, identified myself as an original owner, gave an approximate date of purchase, and was sent new parts.
They sent me a new metal nut, Pfister part 941-7110 . Then, they sent a new chromed plastic handle that has less mass.