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Old 12-05-2006, 11:18 AM   #1
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Exploring bathroom addition on second floor


My house is walkout style with 2 floors. The basement is nicely finished. I have 2 bathrooms on the top floor and they're both on one end of the house. I'd like to add a powder room on the other end. This new bathroom will be within 10 feet (width wise) of a bathroom on the lower level. I can see that the waste stack venting comes up through a wall near where I'd like to put this extra powder room.

Am I screwed? I am thinking I will need to get into the plumbing below the floor line in the basement (which is concrete) to cut into the waste. I'll also need to cut into a wall on the lower level to add the piping for the waste lines. Am I correct?

Any outside the box ideas here?

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Old 12-06-2006, 10:39 AM   #2
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Exploring bathroom addition on second floor


Bump. Any plumbers here? Or have I not given enough info?

Thanks.

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Old 12-06-2006, 10:49 AM   #3
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Exploring bathroom addition on second floor


Yep.... you'll need to locate the nearest Wast to tie into..... and you might be able to use the existing vent as well.
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Old 12-06-2006, 07:59 PM   #4
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Exploring bathroom addition on second floor


Hi wease,

Sounds like you will need to do as your thinking, new line from basement and walls will have to open up, without seeing this, hard to say what you really need to do there.

Sorry for such a late reply.
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Old 12-07-2006, 07:18 AM   #5
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I am currently at the finishing stage of a 2nd story master bath addition. To say the least, getting the plumbing up there was the hardest part of the job. But now that it is done Im glad I did it. Plan on opening floors and walls.
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Old 12-10-2006, 09:15 AM   #6
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Exploring bathroom addition on second floor


The bathroom in the basement is set on the concrete floor. Any idea how you would find the piping under the concrete that would need to be exposed for the plumber? I don't want to pay him to dig up concrete.
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Old 12-10-2006, 09:24 AM   #7
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Exploring bathroom addition on second floor


If the main enters the slab in basement, then won't you have to do is find the main in the wall and tie a new wye in to take to the addition.
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Old 12-10-2006, 09:28 AM   #8
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Exploring bathroom addition on second floor


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If the main enters the slab in basement, then won't you have to do is find the main in the wall and tie a new wye in to take to the addition.
I think I understand, but wouldn't that have to be below the grade of the floor in the basement? Right now I'm assuming I need to chip up concrete to find this waste pipe to tie into. Are you saying I can tie into it in the wall above the toilet floor?
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Old 12-10-2006, 09:33 AM   #9
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Exploring bathroom addition on second floor


You have a basement, is there no toilet on the mainfloor? if there is, then find the where that line comes down the wall and enters the slab in basement, should be a 3 or 4" line, expose it there and see if you can take it from there. Draw a picture a post you floor layout for you old and wanted area of plumbing.
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Old 12-10-2006, 09:51 AM   #10
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That's the problem. I have 2 bathrooms on the top floor, both on the other end of the house. The closest bathroom on the top floor would be 55 feet from this new one and would need to snake through a stairway. Impossible.

The only option for connecting that I see is with the bathroom below it and about 10 feet to the side.
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Old 12-10-2006, 10:00 AM   #11
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Exploring bathroom addition on second floor


Yep that creates the problem, you will need to access the slab, and hope the turn does not head to the outside at that point or then you will need to get to the main from outside and bring in a new line.
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Old 12-10-2006, 10:14 AM   #12
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Exploring bathroom addition on second floor


Any idea how to go about finding the direction of the waste vent in that lower bathroom? Do I start at the source and just start ripping stuff up? or do I start at the wall where the plumbing will travel down through and work my way ... somewhere.
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Old 12-10-2006, 10:20 AM   #13
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Exploring bathroom addition on second floor


Most sewer will take the shortest route to city sewer. Sometimes if you know where the cleanout is at outside, remove the cap, look down in it, that might tell you how it's running out of house. If no idea, then start the the point where main enter the slab and follow it.

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