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Thread: Core Drilling and Floor Drain Question

  1. #1
    DIY Junior Member Brian B's Avatar
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    Default Core Drilling and Floor Drain Question

    I have been tasked many times over the years with installing additional floor drains where core drilling is involved. I have done this many different ways with mixed success. I am not a plumber, i am a Facilities Manager with 20 years experience and have capable staff and decent equipment, we do a lot of plumbing. Here is my question:

    What is the proper way to install a floor drain in a commercial setting where the floor has to be cored? Do you core a 4" hole followed by a 6" down a couple inches, chip out the concrete and set the drain? What is the right material to set it in? What is the best drain to use?

    Any help is greatly appreciated!

    Brian

  2. #2
    Forum Admin, Expert Plumber Terry's Avatar
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    Coring twice is nice.
    I use a cast drain in that situation with an adjustable top.
    I've let the flooring installers worry about the the back fill on the drain. Maybe someone here does flooring and can answer that.

  3. #3
    DIY Member JoshRountree's Avatar
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    Not sure if this will help or not, but seemed pretty good to me. Not sure on the core drilling part though.
    http://www.*******************/adjust...s-install.html

  4. #4
    Moderator & Master Plumber hj's Avatar
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    Drilling a lorge hole for the drain's flange, and a smaller one for the drain pipe is the only way to provide support for it. But the larger hole is usually drilled first, then the smaller one. This gives better control of the water into the lower level.
    Licensed residential and commercial plumber

  5. #5

    Cool Core drilling for floor drains

    Well, for someone who doesn't know about core drilling you hit it right on the head.
    For recessed floor drains that is exactly how you would proceed. We often have core drilled holes of this nature to set something back into the concrete like it was made to go there.
    This also works great for grates and floor lighting.

    But first drill the large hole so you have material (the concrete floor) to work with as far as getting the recess as flat as you can, this is where the chipping hammer comes in. Once you got it the depth you want then drill the smaller hole for the piping.

    We are professional core drillers in North Carolina

    Charlotte core drill
    http://www.charlottenccoredrilling.info

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    DIY Senior Member dlarrivee's Avatar
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    I find it interesting that random professionals come out of the wood work, create an account, and advertise for themselves like this...

  7. #7
    DIY Junior Member Subsurface Imaging, Inc.'s Avatar
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    Quote Originally Posted by dlarrivee View Post
    I find it interesting that random professionals come out of the wood work, create an account, and advertise for themselves like this...
    I couldn't agree more...

    (I'm actually here reading some articles and came across this thread. Thought I would register and hang out for awhile)

  8. #8
    Moderator & Master Plumber hj's Avatar
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    Like "how"?
    Licensed residential and commercial plumber

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