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Thread: Black poly tubing for potable water

  1. #1
    DIY Junior Member leak_chaser's Avatar
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    Default Black poly tubing for potable water

    How can I tell which black poly tubing is for potable water and which isn't? Which rating/certification do I look for? The Home Depot website does not state in plain English if the tubing is for potable water or not.

    Thanks.

  2. #2
    DIY Junior Member leak_chaser's Avatar
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    This is for an underground line from the meter to the house.
    Not sure what you mean by formulation.
    Here is a few links:

    This one has no certifications or listings:
    http://www.homedepot.com/p/Advanced-...0300/203013666

    This one is DWV rated and NSF listed (whatever that means):
    http://www.homedepot.com/p/Advanced-...specifications

    This one is NSF listed:
    http://www.homedepot.com/p/Advanced-...0100/202967364

    I tried the manufacturer's website but no luck.

  3. #3
    Forum Admin, Expert Plumber Terry's Avatar
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    NSF listed. 200 PSI
    If it's a 2-3 bath, 1" will do depending on distance.

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    Jack of all trades DonL's Avatar
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    Quote Originally Posted by leak_chaser View Post
    This is for an underground line from the meter to the house.
    Not sure what you mean by formulation.
    Here is a few links:

    This one has no certifications or listings:
    http://www.homedepot.com/p/Advanced-...0300/203013666

    This one is DWV rated and NSF listed (whatever that means):
    http://www.homedepot.com/p/Advanced-...specifications

    This one is NSF listed:
    http://www.homedepot.com/p/Advanced-...0100/202967364

    I tried the manufacturer's website but no luck.

    I would not use that kind of tubing for your application , if it is approved or not.

    Plenty of sand may let it work for awhile.

    I would not cut corners on your install.


    Daddy Terry knows best.
    Last edited by DonL; 10-27-2013 at 03:13 PM.
    Theory only works perfect in a vacuum.

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  5. #5
    DIY Junior Member leak_chaser's Avatar
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    Quote Originally Posted by DonL View Post
    I would not use that kind of tubing for your application , if it is approved or not.

    Plenty of sand may let it work for awhile.

    I would not cut corners on your install.


    Daddy Terry knows best.
    Thanks. But what would you use?

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    Jack of all trades DonL's Avatar
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    Quote Originally Posted by leak_chaser View Post
    Thanks. But what would you use?

    Something rated over 160 PSI.

    Schedule 40 PVC would be my choice.

    That 1 inch that you listed is not all that great.
    Theory only works perfect in a vacuum.

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    In the Trades Tom Sawyer's Avatar
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    If you are running underground from the well or city water main you want 160lb rated poly. Around here, thats pretty much all we use, including the city water departments.
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

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    Jack of all trades DonL's Avatar
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    Quote Originally Posted by Tom Sawyer View Post
    If you are running underground from the well or city water main you want 160lb rated poly. Around here, thats pretty much all we use, including the city water departments.

    That is some pretty thin stuff.

    I guess the city water department would like to use it. You Pay for the leaks and keep them in work digging it up and replacing it.
    Theory only works perfect in a vacuum.

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    In the Trades Tom Sawyer's Avatar
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    Its actually pretty thick stuff and if properly bedded it will never leak. Its the same stuff we hang submersible water pumps on.
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

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    Moderator & Master Plumber hj's Avatar
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    quote; including the city water departments.

    Our local paper just had a picture of some water department employees removing the poly supply to the meters and changing to copper tubing. So it seems it is NOT the panacea that everyone thought it would be, but then that has happened with a lot of plastic piping over the years.
    Licensed residential and commercial plumber

  11. #11
    Sprinkler Guy Wet_Boots's Avatar
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    Yesteryear's 160-psi poly has become today's 200-psi poly, by way of newer high-density resins. The old 160-psi poly made from medium-density resin is still available, but is mostly used in wells, for submersible pumps.

    The key for potable water usage is the NSF-Rated labeling, insuring that all virgin resin went into the manufacture of the poly.

    Buried as shallow as it figures to be in South Carolina, I'd consider sch 40 PVC instead, unless they got some good reason not to use it.

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    DIY Senior Member craigpump's Avatar
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    Use 160 or 200 psi poly from a reputable manufacturer like Charter Plastics, bed it in sand and be done with it.

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    In the Trades Tom Sawyer's Avatar
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    Agreed. I NEVER use PVC for water supply, either below or above ground.
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

  14. #14
    Moderator & Master Plumber hj's Avatar
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    Quote: I NEVER use PVC for water supply,

    Around here PVC is about the only thing that is used.
    Licensed residential and commercial plumber

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    DIY Senior Member Reach4's Avatar
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    I don't have experience with any of this. I found this article of interest: http://www.usplastic.com/knowledgeba...contentkey=782 --in particular, the discussion of thermal expansion and contraction. They seemed to only be worried about it for when the cement was not totally hardened, but I wonder if some consideration would make sense for long runs over the long term.

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