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    mugishima's Avatar
    mugishima Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Apr 28, 2013, 09:12 AM
    Tub hot water knob keeps turning.
    After turning on the hot water knob to required output... the knob keeps turning by itself... letting more and more water out... why?
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #2

    Apr 29, 2013, 08:02 AM
    One or two handle valve? What brand is it? Back to you. Tom
    mugishima's Avatar
    mugishima Posts: 3, Reputation: 1
    New Member
    		  
    #3

    Apr 29, 2013, 08:22 AM
    Quote Originally Posted by speedball1 View Post
    One or two handle valve? What brand is it? Back to you. Tom
    It is two handle valve and the brand is price phister.
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #4

    Apr 29, 2013, 08:48 AM
    The knob fits over splines on the stem, This is what prevents it from slipping.
    It's my guess that the splines on the handle are stripped. Replace the knob. Good luck, Tom
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
    Uber Member
    		  
    #5

    Apr 29, 2013, 01:07 PM
    If the knob is tight, take it off and seenif you can tighten the packing nut for the stem. Sometimes they will be loose enough to let the stem turn but not leak.
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