10 Yr Old Kohler Taboret LAV Sink Faucet Acts Like Bad Pressure Balancer

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by John_7951, Mar 28, 2014.

  1. John_7951

    John_7951 New Member

    Messages:
    4
    Location:
    Illinois
    I have a a 10 year old Kohler Taboret widespread sink faucet (K-8211) that behaves like it has a bad pressure balancer. Looking at the diagrams on the Kohler web site, I don't see anything that suggests the faucet even has a pressure balancer function. This is a sink valve not a shower valve.

    Does anyone know what might be going on? I can turn the hot water on in the morning and it runs fine until the hot water arrives. Then the flow slows down to a trickle. I can open the cold water and the pressure returns but I get lukewarm water.

    Thanks
    Last edited by a moderator: Mar 29, 2014
  2. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,508
    Location:
    Cave Creek, Arizona
    It does NOT have a PBU, and if it did, it would only change the hot water pressure to match the cold, but you DO have cold pressure so that is not the problem. There are temperature specific problems, such as expanding rubber washers or brass stems, but we would have to be there to diagnose those problems.
  3. asktom

    asktom Member

    Messages:
    529
    Location:
    Victor, MT
    My guess would be a loose washer. This happens at times if the seat is bad and grabs the washer, which can twist the washer and the screw along with it. If the washer is gouged, change the seat. Thats my guess, but, like HJ said, there are other possibilities.
  4. John_7951

    John_7951 New Member

    Messages:
    4
    Location:
    Illinois
    Thanks for the info. I guess I just have to take it apart.

    One other question tho - could it be the ceramic cartridge itself? I replaced it 3+ years ago.

    I have a clearer explanation of the behavior (after shaving this morning). I can open the faucet
    full and the flow is normal. At first, it takes about a minute for the flow to slow down - to about
    half - not a trickle. Then, if I shut it and open the faucet again, it runs full for about 1 second
    then slows again.
  5. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,508
    Location:
    Cave Creek, Arizona
    If it is not the cartridge, then it would have to be in the piping, or the connection between the faucet and the spout, which would be very unusual. However, if the hose between the faucet and spout is kinked, that symptom could occur as it expands and contracts making he kink bend and shut off the water.
  6. Terry

    Terry Administrator Staff Member

    Messages:
    14,904
    Location:
    Bothell, Washington
    It could also be the shutoff at the wall. Many of those have rubber washers. I like to replace the ones that are twenty plus years old for that reason.
  7. John_7951

    John_7951 New Member

    Messages:
    4
    Location:
    Illinois
    Your amazing Terry!!! That's exactly what it was. I didn't replace the valve. I just opened it up all the way. I must have left it half open when I changed the cartridge. Thanks to all who helped with suggestions.
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