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Thread: What are these pipes?!

  1. #1

    Default What are these pipes?!

    Hi everyone! I'm a construction worker by trade and have dabbled in electric and plumbing during my tenure, but these pipes have me stumped! Seeing as how winter is almost on us in Montana, I'm ready to convert my unfinished basement into a two bedroom one bath paradise but these darn pipes have put a halt on the whole project. I've tried to get a plumber out to the house but they're all a month out on bids. Hopefully I can get some much appreciated advice here. I just need to know what the pipes are for so I can figure out how to frame in the walls. From the pictures, one can see a cardboard box cemented into the basement foundation (there is gravel in it), than a 1 1/2 inch pipe a 4 inch (toilet?) and a 2 inch. In the other picture a 2" pipe is way hell and gone away from the rest. I'm assuming the lonely one is the shower drain but I'm not positive. I read in another thread that these pipes could already be vented under the slab? I need help! Thanks in advance. Jeff

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  2. #2
    Jack of all trades frenchie's Avatar
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    Just going by the sizes: 1-1/2 is for sinks, 2" is for showers, (the other one might be the vent), 4" is for toilets. The cardboard box, if you take the gravel out, might be for a cleanout? Or it'll have some 1-1/2 coming out the side, for a bathtub.
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    DIY Senior Member CHH's Avatar
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    How 'bout the other 2" is for laundry room?

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    Master Plumber Dunbar Plumbing's Avatar
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    Either that or a bar sink......or a vent picking up the 2nd floor drain?
    Read what the end of this sentence means.

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    Plumber Winslow's Avatar
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    The 4 inch pipe is the toilet drain
    The box with the gravel in it is the shower drain
    the 11/2 pipe is the shower vent
    the 2 pipe by the toilet is the toilet vent and possibly the lav drain if local code permits wetventing.
    The 2 pipe located off by it's lonesome is a sink drain.
    Last edited by Winslow; 11-09-2007 at 01:43 AM.

  6. #6
    Commercial Plumber markts30's Avatar
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    Quote Originally Posted by winslow View Post
    The 4 inch pipe is the toilet drain
    The box with the gravel in it is the shower drain
    the 11/2 pipe is the shower vent
    the 2 pipe by the toilet is the toilet vent and possibly the lav drain if local code permits wetventing.
    The 2 pipe located off by it's lonesome is a sink drain.
    Agreed...
    The shower drain is buried in the box-out...
    I would have to assume the 2" that is all alone at the other end of the bsmt is for a kitchen sink (for a bsmt apt for example)...

  7. #7
    Moderator & Master Plumber hj's Avatar
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    Default pipes

    Without actually looking down the pipes to see how they are connected, we have little actual knowledge of what they were intended for. The box in the floor could be for a shower OR tub. The others might be used for whatever you want them to be. But one thing you can be sure of is that they are NOT vented under the floor.

  8. #8
    Homeowner geniescience's Avatar
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    if it holds water then it has a P trap at the base. This is confirming information that tells you which of all the various hunches are correct.

    david

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    Jack of all trades frenchie's Avatar
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    That'll tell you which one is the shower, but beyond that...

    Sinks generally don't have their Ptrap under the slab.



    I can only think of one solution, and it's to get someone with a camera snake thingy. Then you could work out how they're all connected.
    Master Plumber Mark:

    there is nothing better than the
    manly smell of WD 40 in the air
    while banging away on brass with a chisel and hammer...

    it smells like......victory......

    do not hit your thumb...
    __________________
    Just so everyone's clear: I'm the POODLE in the picture ("french", get it?) The hot woman is my wife.

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    Master Plumber Dunbar Plumbing's Avatar
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    Quote Originally Posted by frenchie View Post
    That'll tell you which one is the shower, but beyond that...

    Sinks generally don't have their Ptrap under the slab.



    I can only think of one solution, and it's to get someone with a camera snake thingy. Then you could work out how they're all connected.


    And on that statement....

    I recently ordered a RIDGID micro-seesnake with 30" extensions. I can make that 10' long and have every intention of making money with it.

    Read what the end of this sentence means.

  11. #11
    Plumber Winslow's Avatar
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    Quote Originally Posted by hj View Post
    Without actually looking down the pipes to see how they are connected, we have little actual knowledge of what they were intended for. The box in the floor could be for a shower OR tub. The others might be used for whatever you want them to be. But one thing you can be sure of is that they are NOT vented under the floor.
    How can you be so sure nothing is vented below the floor?

  12. #12
    Jack of all trades frenchie's Avatar
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    Because venting happens on the other end of the pipe.

    One or more of the pipes sticking up, might be connected for use as a vent; but until you connect to it & run the vent up through the roof & etc... it's not vented.


    Rugged - I was eyeing that one... finally an affordable one! How is it?
    Master Plumber Mark:

    there is nothing better than the
    manly smell of WD 40 in the air
    while banging away on brass with a chisel and hammer...

    it smells like......victory......

    do not hit your thumb...
    __________________
    Just so everyone's clear: I'm the POODLE in the picture ("french", get it?) The hot woman is my wife.

  13. #13
    Plumber Winslow's Avatar
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    Quote Originally Posted by frenchie View Post
    Because venting happens on the other end of the pipe.

    One or more of the pipes sticking up, might be connected for use as a vent; but until you connect to it & run the vent up through the roof & etc... it's not vented.


    Rugged - I was eyeing that one... finally an affordable one! How is it?
    Venting begins at the point where the trap arm meets the drain. From there it continues up through the roof (or is tied in to aanother vent above the flood rim). On a toilet, tub, shower, floor drain, ect this happens below the floor, so the 11/2 and 2" pipes near the 4 inch are most likely vents for the shower and toilet, whether they are currenly tied in up through the roof or not. The fact that the system has not yet been topped out doesn't change their intended purpose, it just isn't a completed system yet. The original owner wanted the option of adding fixtues later on without having to break the floor.

  14. #14

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    Looking at the layout, it's hard to tell what the original installer intended. I'm guessing that the 2" is a vent for the closet (and good luck getting a flange on that!), and the 1-1/2" is the vent for the tub, which is the box in the floor. But the box is close to the toilet stub. Here, in the UPC code, we aren't allowed any pipes beneath the floor smaller than 2", and every stack needs a cleanout on it before it drops into the floor.

    Of course, you can't tell if it's vented on the horizontal or vertical. I used to always try to get enough depth to put my vents vertical as required by the continuous waste and vent system, or, as a plumbing inspector used to say, "Horizontal venting is only to be used when it is structurally impossible to use vertical vents - and being too lazy to dig isn't a structural condition."

  15. #15
    Master Plumber Dunbar Plumbing's Avatar
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    Quote Originally Posted by frenchie View Post

    Rugged - I was eyeing that one... finally an affordable one! How is it?
    Go to ridgid forums and keyword the product name and you'll see the comments on it.

    I'll know soon enough and plan on charging for it's use, no matter what the task.

    Speshaw taknawedgie koams wit dey praic!!!
    Read what the end of this sentence means.

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