Moen making me moan ! And Delta dilema !

Discussion in 'Shower & Bathtub Forum & Blog' started by derick, Oct 16, 2005.

  1. derick

    derick New Member

    Sep 20, 2005
    Ive replaced a moen tub/shower faucet cartridge to correct the hot/cold water temperature problem. The water temp was fluctuating when taking a shower. It worked for a few days. Now said faucet is suddenly becoming very hot/scalding or cold unexpectedly. We have a water softener and replace salt regulary, but when we first moved into house there was no water softener and the city supply is Hard water. The temp fluctuations are anoying/scalding when taking a shower. The faucet is about 12 years old approximately. Ive flipped the moen cartridge 180 degrees/ no luck. flipped it back 180/ no luck. Ive adjusted the plastic temp setting on the stem about 8 different times/no luck. Im thinking about just replacing it with a new tub/shower faucet. Any feedback ?? On another note , in the same bathroom: the water pressure from the Lav delta faucet drops by about 80 percent, then inexplicably will resume full or partially full pressure after turning it off and on a few times. Other times the Lav/delta faucet will stay with the significantly reduced pressure for much longer time. Very frustrating. Ive taken both the moen(bath/shower faucet) and the delta(lav/faucet) apart and have found no significant debri. No aerator probs on the lav/delta wich is about 5 years old. Maybe just blow the lines with water pressure for a good minuite to see if anything surfaces?? or Just replace both ??? It seems as though ghosts sometimes live in plumbing fixtures. Blessings to all plumbers and to all those that attempt it !!!! Thank you :)
  2. Master Plumber Mark

    Master Plumber Mark Sensitivity trainer and plumber of mens souls

    Feb 6, 2005
    Sensitivity trainer.. and plumber of mens souls
    indianapolis indiana - land of the free, home of
    A Possible Problem

    Yesterday I had to go out to a home where I had installed
    a power vent water heater 2 weeks ago...

    he was complaining about low water pressure on the hot side...

    all it turned out to be was a bad water shut off valve...

    the washer had come off the screw that held it in place and had
    wedjed into the opening and had shut the flow off to the
    wate r heater . It took a new 3/4 washer and I was out of there.

    if you are having this happen on both the shower and the delta faucet in the same room its a good chance of something like this..

    you might want to check the valves on the bypass at the softener and see
    if one of them is doing the same thing

    or any other main valve that might have a washer in it...
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  4. jimbo

    jimbo Plumber

    Aug 31, 2004
    San Diego, CA
    It sounds like you have a Moen Positemp. The balancing spool in that can stick and cause similar symptoms. BUT, you said you replaced the cartridge already, so I would be looking at the things mentioned by mp..mark/
  5. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona

    If you have a Moentrol valve the balancing spool is separate and is under the chrome trip plate. It is a large slotted nut to the right of the cartridge. It cannot be repaired, usually, and should be replaced. MPM, if you replaced the water heater two weeks ago, why does it still have a glove valve on the inlet supply?
  6. Master Plumber Mark

    Master Plumber Mark Sensitivity trainer and plumber of mens souls

    Feb 6, 2005
    Sensitivity trainer.. and plumber of mens souls
    indianapolis indiana - land of the free, home of
    why a globe valve?? why not??

    we change out water heaters for a set price
    which is very competitive.....

    the whole house had globe valves in it from the main through the
    water conditioners...

    if you got a job to do you do it , and if everything seems to be
    in proper working order , you move on...

    and dont try to
    sell the customer something that they dont absolutley
    have to have..
    if you do this, you can appear to be trying to shake them down
    for a few extra bucks....or a lot of money..

    some plumbers in Indianapolis actually start a water heater change out
    THEN mention extras that should be mnetioned BEFORE the job
    starts, like a PAN, a THERMAL EXPANSION TANK< and a PRV valve...

    and then calim that they cant warranty the heater
    becasue of high water pressure ect.... and usually
    try to shake down the customer for another 300+ dollars...

    their is a fine line you walk between doing good
    honest service work and basically shakeing down the

    But this time one came back to bite me for a minor service call.

    it was no big deal

    but it could be the reason this fellow is having fluctuations
    in his pressure on both the pressure balanced MOEN shower faucet
    and also pressure problems with that normal Delta lavatory faucet...
    Last edited: Oct 16, 2005
  7. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    If it isn't a pressure balance valve, then you might want to replace the whole thing. If it is, it sounds like it needs the spool. Responses here indicate that these get crudded up and stick over time.
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