Rough in height for bathroom sink?

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by don metzinger, Aug 30, 2006.

  1. don metzinger

    don metzinger New Member

    Joined:
    Sep 17, 2005
    I was looking on this site for basic rough in dimensions. At what height should the drain for a bathroom sink be? I have a friend who is experiencing problems with a set of bath sink drains that is connected up with the most crazy arrangement of flex lines and cut and glued piping I have ever seen. I think that all of this possibly starts with the drain coming out of the wall a bit high into the bath cabinet. My own drains come into the cabinet at about 13". Thanks for any info. don
     
  2. Mikey

    Mikey Aspiring Old Fart, EE, computer & networking geek

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    Nov 8, 2005
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    Consumer
    Location:
    Central Florida
    We installed an extra-high vanity, and I thought it'd be smart to raise the rough-in height accordingly. I don't remember the basic height, but I added the 7" or whatever the difference was.

    Big mistake. I just got around to installing a temporary countertop and the basins Sunday, and there was a short period of panic trying to figure out how to make water run uphill (we also chose extra-deep basins). Eventually turned out very nice and we don't have a lot of pipe cluttering up the under-sink storage, but this experience has taught me that lower is better. They make tailpiece extenders, but not tailpiece shrinkers :D .
     
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  4. ToolsRMe

    ToolsRMe New Member

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    Mar 12, 2006
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    CO
    I purchased one of those fancy glass attached-to-the-wall-and-no-feet sinks.

    Make damn sure that you get the distances from the rough-in water supply to the drain EXACTLY right or you may be removing tile and drywall ... as I did.
     
  5. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

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    SHort answer...pick your vanity and sink FIRST, then think about where the rough-ins need to go. From most vendors, you can download their installation drawings which show where the supplies should go so you don't have to buy it right away. Some people like lower vanities, some higher, even if the sink is attached to the wall, unless you need to comply with ADA requirements, put it where you want it for height. The manufacturer will usually tell you where THEY think it should be for "general" use, but if this is only to be used by adults, and they are both tall, you may very well want it higher than "normal".
     
  6. don metzinger

    don metzinger New Member

    Joined:
    Sep 17, 2005
    Everything is already in place but when the sink started leaking I was asked to look at it and found the craziest plumbing arrangement I have seen. As I looked at the piping and makeshift arrangements I it appeared to me to be the result of the wall bend being too high. I will be back there tomorrow and can actually measure but was curious if there was a standard rough in height. I don't know if pictures can be posted on this forum but I have to take a picture or two tomorrow. Jim I have seen your postings on the John Bridge forum, I do home repair work and find these forums to be really great for info and help. Thanks - don
     
  7. Winslow

    Winslow Plumber

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    Dec 30, 2005
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    Plumber
    Location:
    Hawaii
    I usually rough-in the lav drain at 20" off the subfloor, usually works fine. unless they use granite floors with a mud base i don't have to use an extension tailpiece and height isn't a problem. With a standard height lav (31" AFF) and a standard sink (71/4") you can make it with a drain as high as 22" AFF.
     
  8. johnfrwhipple

    johnfrwhipple BATHROOM DESIGN & BUILD for both Canada & the US

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    Jul 20, 2009
    Occupation:
    Design Work World Wide: Bathrooms Vancouver Area
    Location:
    North Vancouver, BC
    This is an old discussion and one that should involve the Kitchen and bathroom Designers. Today every sink we see is concealed in a vanity with drawers or part of a floating cabinet.

    Check with the designer first. Get the specs on the cabinet. Try and leave the lower drawer free of the pTrap.

    That makes for the most room and nicest end result.
     
  9. hj

    hj Moderator & Master Plumber Staff Member

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    Cave Creek, Arizona
    They have absolutely NO consideration about plumbing when they build cabinets with shelves or drawers under the sink.
     
  10. johnfrwhipple

    johnfrwhipple BATHROOM DESIGN & BUILD for both Canada & the US

    Joined:
    Jul 20, 2009
    Occupation:
    Design Work World Wide: Bathrooms Vancouver Area
    Location:
    North Vancouver, BC
    True - but when the cabinet guy cuts a hole in the bottom of the bathroom vanity for the P Trap to poke through people get Upset.

    I prefer when I can to install the PTrap against the back wall and the sink outlets taken hard 90 to the back of the cabinet and then drop to the PTrap. This gives me the most room in the vanity drawers with the littlest work.
     
  11. Mikey

    Mikey Aspiring Old Fart, EE, computer & networking geek

    Joined:
    Nov 8, 2005
    Occupation:
    Consumer
    Location:
    Central Florida
    Doesn't matter if there are shelves or not -- the undersink area will be full of crap no matter how it's arranged. I use removable side shelves under vanities and sinks to make it easier to store lots more crap. Very appealing to clients of the female persuasion.
     
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