How to remove Grohe Sinfonia Faucet

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by atulc, Mar 30, 2011.

  1. atulc

    atulc New Member

    Joined:
    Mar 18, 2011
    Location:
    Metro NYC
    I need to replace the cartridge in my Grohe 20.655 Sinfonia two-handle lavatory wideset. This requires removal of the cross handle 1 and cap 5 (see the diagram and parts list). It is straight forward to remove the cross handle. But I can't figure out how to remove the cap.

    Grohe tech support recommended a strap wrench. I've tried, but the strap wrench keeps slipping because of the bell shape of the cap. As a last resort, I'd have to loosen the nut under the sink. But it is very crowded under the sink and I want to avoid this route. Any suggestions on how to unscrew the cap? Thanks.

    Sinfonia.gif Parts.jpg
     
  2. hj

    hj Moderator & Master Plumber Staff Member

    Joined:
    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    Wrap it with black electrical tape and use a good pair of Channelock pliers. Removing the faucet would not help at all.
     
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  4. atulc

    atulc New Member

    Joined:
    Mar 18, 2011
    Location:
    Metro NYC
    HJ - thanks, I'll try out the electrical tape and channel lock pliers.

    Sorry, I didn't mean to remove the faucet but just the handle and cap. Thanks for correcting that.
     
  5. Basement_Lurker

    Basement_Lurker One who lurks

    Joined:
    Jun 21, 2007
    Occupation:
    I smash things and demand money.
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    Victoria, BC
    Man I hate Grohe, heh. That escutcheon should unscrew. Hj's method will certainly give you a good grip, but you have to careful with how much squeezing force you apply. Another way to go is to wear gloves with a special rubber grip coating applied to the underside...that will allow your fingers to get a good grip if you can't get a rubber strap wrench on there.
     
  6. atulc

    atulc New Member

    Joined:
    Mar 18, 2011
    Location:
    Metro NYC
    Finally got the cap off by wrapping it in plenty of electrical tape and using channel lock pliers. I can see now why it was so hard to unscrew - the cartridge and the inside of the cap are heavily corroded. Now to the next challenge - despite removing the cap, I can't get the cartridge out. It's frozen inside the housing due to corrosion. Time to call Grohe for more warranty parts.

    Basement_lurker - agree with your sentiment.
     
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