Attach faucet directly to granite counter?

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by chrisd, Mar 9, 2006.

  1. chrisd

    chrisd New Member

    Messages:
    9
    I have what I'm sure is a basic question, but I haven't been able to find a reference in previous posts.

    My single-hole faucet has become loose underneath my granite counter. Apparently, water has been getting in through the hole the past year and has left the wood underneath (plywood?) rotted and nasty and probably contracted.

    When I mentioned it to a friend that was over, he suggested drilling a hole into the wood about a half inch larger than the faucet. He said that attaching the faucet to the granite was the way to go and that the guy who installed it was probably lazy.

    So are all properly-installed faucets tightened directly to the granite? Are there any things I should watch out for, like over-tightening?

    Thanks.
  2. Terry

    Terry Administrator Staff Member

    Messages:
    15,001
    Location:
    Bothell, Washington
    I prefer mounting the faucets to granite, and not to the wood.

    Wood compresses.

    It would be nice, if whoever is cutting the faucet holes in the granite, also precut the wood a bit bigger for the plumber.

    It's hard to tell someone how tight to put things.

    It's a feel thing.
  3. jimbo

    jimbo Plumber

    Messages:
    8,997
    Location:
    San Diego
    This is a very common "trouble" area. For some reason, the kitchen design contractor and the granite people like to keep their head in the sand, or some where else I won't mention, and bring in someone at the last minute to install a faucet and have not given any previous consideration to the install issues such as you mentioned.


    The even worse situation is the homeowner who is buying fixtures on his own. He spends a fortune on a nice marble or granite kitchen or lav. Then goes to HD the night before he has someone coming in to install the faucet. He buys one off the shelf, not realizing that he really needed to order a long shank model, with 4 weeks lead time. Then doesn't understand why the plumber can't install his little beauty!
  4. Terry

    Terry Administrator Staff Member

    Messages:
    15,001
    Location:
    Bothell, Washington
    Jimbo is right,
    You can get the long shank models, or even extensions for some faucets.

    Most extensions arrive in a few days.
    But yes, it's another trip for the plumber, and time for the phone call as well.
    Did I say "TIME"?

    It all adds up.
  5. sulconst2

    sulconst2 New Member

    Messages:
    205
    Location:
    old bridge nj
    wondering why there would be plywood under granite. if this is a kitchen then the granite should have been installed directly on the cabinets. if you have a blind corner then bracing is used to support the counter. unless this is granite tile?
  6. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,997
    Location:
    New England
    It could be 2mm slab or tile...then you might want/need plywood underneath.
  7. chrisd

    chrisd New Member

    Messages:
    9
    Thanks Terry for the advice - I will drill a hole then into the wood.

    On a related note, I've narrowed my choice of a new kitchen faucet down to Grohe and Hansgrohe.

    I'm aware of Grohe's sterling reputation, but just how much better - in dollars - is Grohe compared to Hansgrohe. For example, if I'm spending $200 for a Hansgrohe, is a Grohe worth another $100? $200?

    Also, I'm strongly considering buying a faucet off E-b a y. But because the warranties for both companies require a receipt, I don't think I'll be eligible to use it if the need ever comes up. Does anyone have any knowledge regarding the frequency of repair for either brand and the likelihood I'll have to use a warranty in the future?

    Thank you for your help.
  8. chrisd

    chrisd New Member

    Messages:
    9
    Not sure of the thickness, but I just thought plywood was needed for a level surface and additional support . Wish I knew better, but kinda clueless when it comes to this stuff.
  9. Terry

    Terry Administrator Staff Member

    Messages:
    15,001
    Location:
    Bothell, Washington
    Most of the stone I see is laid on plywood.
  10. toolaholic

    toolaholic General Contractor Carpenter

    Messages:
    874
    Location:
    Marin Co. Ca.
    I See More Trouble

    The existing hole gives you no pilot for a hole saw to stay centered on!

    a plywood temp needs to be used to stay centered in the existing hole.

    hope you have the skill to do a clean job. good luck
  11. chrisd

    chrisd New Member

    Messages:
    9
    toolaholic,
    You mean I should place another piece of plywood under or over the hole to create a pilot hole?
  12. toolaholic

    toolaholic General Contractor Carpenter

    Messages:
    874
    Location:
    Marin Co. Ca.
    Yes

    you can't secure from the finished top with screws,so underneath is your option, CAREFULLY ,using a narrow peice of plywood,screw it in place through the existing ply. a couple of inches past each side. frim above . carefully drill an 1/8" center hole in the ply. now using a hole saw drill an over size holethrough the template and under counter ply. not easy access
    good luck tool
  13. chrisd

    chrisd New Member

    Messages:
    9
    Thanks for the advice Toolaholic...will put it to good use.
  14. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,625
    Location:
    Cave Creek, Arizona
    hole

    You use one hole saw the size of the existing hole and then fasten it to the saw's mandrel, as a guide, inside the one for the new hole. The mandrel will have the instructions how to do it.
  15. chrisd

    chrisd New Member

    Messages:
    9
    I don't understand this statement - I put the smaller saw inside the larger one, or the hole? Could you clarify please?

    And anyone with an opinion in regards to Grohe faucets and frequency of repairs?
  16. toolaholic

    toolaholic General Contractor Carpenter

    Messages:
    874
    Location:
    Marin Co. Ca.
    HJ,HOW does the double cutters attach to the mandrel?

    I MUST HAVE 5 morse ones with a male thread and pin lock. vagely ,i seem to remember seeing this somewhere. the inside cutter would have to be longer to pilot ,i believe.

    on GROHE faucets , i believe the problems of slow flow come from the 2 filters on the feed ends blocking from minute debrea . i also had a friend ask me about reduced flow on theirs. Am a carpenter plumber ,and don't have the experiance of many knowegeable folks here.
    Thank's in advance for answers Tool :)
  17. chrisd

    chrisd New Member

    Messages:
    9
    Is there a known problem with slow flow on Grohe faucets?
  18. ToolsRMe

    ToolsRMe New Member

    Messages:
    145
    Location:
    CO
    Ooooo ... I love that solution!

    I could have used it yesterday as well as a week ago. Sigh.
  19. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,997
    Location:
    New England
    Almost all faucets have screens on their inputs to block crud from getting to their insides. The crud, rust, sand, or who knows what, can ruin the cartridge. To prevent that from happening, they use the coarse filter screens on the input. You shouldn't have any stuff large enough to clog the screens running in your pipes, but if you do, it is better to block it so you don't ruin the cartridge. The screens can be cleaned...for free except for a little time, if and when it happens. The cartridge is not cheap, but may not be exorbitantly expensive, either depending on the brand. So, if the flow gets slow, clean the screens. Then figure out why they are getting clogged so it doesn't happen again.

    You car won't run if the fuel filter gets clogged either...should you remove the filter to try to get another few miles out of it as the injectors get clogged one by one?
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