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  1. #1
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    Default Trapped Drain Line in Crawlspace

    Hi Guys,
    Are drain line allowed to be trapped in a crawlspace?? I never seen this before, i'm located in Georgia.

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  2. #2
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    Default Re: Trapped Drain Line in Crawlspace

    I vote yes! Where else would you find the shower, tub and laundry traps unless the floors were elevated?
    It's when you don't see them that it's a problem. Now, if it is a second trap under an already trapped sink or other fixture it would be a bad thing.


  3. #3
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    Default Re: Trapped Drain Line in Crawlspace

    For a tub or a shower, (in my best Bugs Bunny imitation) "Why certainly!"

    However, keep in mind that the maximum vertical distance from the fixture outlet to the trap weir is 24", so it could also be a low sink, utility tub/sink, mop sink (which is on the floor), etc.

    Jerry Peck
    Construction Litigation Consultant ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  4. #4
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    Default Re: Trapped Drain Line in Crawlspace

    Quote Originally Posted by solidstructure View Post
    Hi Guys,
    Are drain line allowed to be trapped in a crawlspace?? I never seen this before, i'm located in Georgia.
    Is this your first crawlspace?

    Out of curiosity, where would you think a tub or shower drain line is trapped?

    Dom.


  5. #5
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    solidstructure Guest

    Default Re: Trapped Drain Line in Crawlspace

    Quote Originally Posted by Dom D'Agostino View Post
    Is this your first crawlspace?

    Out of curiosity, where would you think a tub or shower drain line is trapped?

    Dom.
    Only been inspecting for 3 months and have done 2 crawlspaces.


  6. #6
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    Default Re: Trapped Drain Line in Crawlspace

    Quote Originally Posted by Jerry Peck View Post
    For a tub or a shower, (in my best Bugs Bunny imitation) "Why certainly!"

    However, keep in mind that the maximum vertical distance from the fixture outlet to the trap weir is 24", so it could also be a low sink, utility tub/sink, mop sink (which is on the floor), etc.
    Jerry, Why do I feel like I've just been "Meatloafed"? You know, "two out of three ain't bad". For some reason I seem to remember that a washer drain can have a maximum 30" from top of pipe to the weir.


  7. #7
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    Default Re: Trapped Drain Line in Crawlspace

    I am with Gary on this one. I seem to recall traps (other than tub/shower) were not allowed to be under the floor. I don't have time to look this up, but I'll try tonight.

    Department of Redundancy Department
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  8. #8
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    Default Re: Trapped Drain Line in Crawlspace

    Quote Originally Posted by Gunnar Alquist View Post
    I am with Gary on this one. I seem to recall traps (other than tub/shower) were not allowed to be under the floor. I don't have time to look this up, but I'll try tonight.
    Traps with slip joints (not glued, etc) are required to be accessible - traps designed that they can be disassembled and reassembled.

    Glued, soldered, leaded, etc traps

    Jerry Peck
    Construction Litigation Consultant ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  9. #9
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    Default Re: Trapped Drain Line in Crawlspace

    Quote Originally Posted by solidstructure View Post
    Only been inspecting for 3 months and have done 2 crawlspaces.
    Well then, welcome to the fray.

    You'll find some of the most interesting discoveries in crawls, that's for sure.

    Dom.


  10. #10
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    Default Re: Trapped Drain Line in Crawlspace

    A bit of crawlspace advice.
    When I started, crawlspace entry outside, I would suit up and get the dirty work done, then go inside. That is not the way to do it.
    Go inside and run water in all the fixtures, and especially every shower stall and tub, before the crawl. You will find leaky drains that way.

    There is a slip joint that is used in fiberglass shower stalls and they leak quite a bit. A shower that doesn't get used will have a dry seal, and it will leak when the new owners start using it.

    John Kogel, RHI, BC HI Lic #47455
    www.allsafehome.ca

  11. #11
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    Sep 2010
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    NY Finger Lakes Area
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    Default Re: Trapped Drain Line in Crawlspace

    Quote Originally Posted by solidstructure View Post
    Hi Guys,
    Are drain line allowed to be trapped in a crawlspace?? I never seen this before, i'm located in Georgia.
    ........if you were inspecting in "cold country", that method of trapping would not work in unheated crawls. Some provision would be needed to keep the trap from freezing - one way would be a drum trap tucked within the insulated floor system. The manufactured home industry typically has elevated tub/shower floors so traps are within the conditioned space........Greg


  12. #12
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    High Springs, Florida
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    Default Re: Trapped Drain Line in Crawlspace

    Quote Originally Posted by John Kogel View Post
    A bit of crawlspace advice.
    When I started, crawlspace entry outside, I would suit up and get the dirty work done, then go inside. That is not the way to do it.
    Go inside and run water in all the fixtures, and especially every shower stall and tub, before the crawl. You will find leaky drains that way.
    Yep! That's how it's done.


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