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Old 01-27-2012, 11:20 PM   #1
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Sewage line and vent design new basement bath


What would be the best/easiest way to run the sewage lines and vents in this layout (or a similar layout). I have attached a basic layout sketch. The less concrete I have to bust out the better.

Does the toiled need a vent or is it close enough to the main line/vent to be considered vented? Can the shower and tub lines be vented together?

Here are actual photos of my sewage pipes:


https://lh5.googleusercontent.com/-C.../IMG_00401.jpg

https://lh5.googleusercontent.com/-w...G_0041text.jpg

Thanks for any advice.
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Last edited by JayRay; 01-27-2012 at 11:45 PM.
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Old 01-27-2012, 11:26 PM   #2
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Sewage line and vent design new basement bath


The toilet looks fine

Run a 2" to the tub, put a 2" Y in for the shower, Bring the 2" up and back to the vent

Run a 1 1/2" to the sink and bring the 1 1/2" up at a min 6" above the sink level and back to a vent

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Old 01-27-2012, 11:29 PM   #3
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Sewage line and vent design new basement bath


Is the new layout upstairs or in the basement?
Where is the existing stack located on the drawing?
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Old 01-27-2012, 11:34 PM   #4
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Sewage line and vent design new basement bath


I guess I didn't need to post the upstairs bath pictures, that caused some confusion. The main stack is on the left of my drawing, in blue. The new layout is of the basement. Thanks.
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Old 01-27-2012, 11:44 PM   #5
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Sewage line and vent design new basement bath


The problem you may have is that the distance from the building drain to the tub and will you have the difference in elevation you will need to get proper slope for the 2" pipe
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Old 01-27-2012, 11:51 PM   #6
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Sewage line and vent design new basement bath


Also depends what code you’re under. Under our code you would need two vents in that system. Maybe one depending on the distance between fixtures.
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Old 01-28-2012, 01:30 AM   #7
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Sewage line and vent design new basement bath


I am fairly certain I can get the required slope in the 2" tub pipe. Where does the vent have to come off the main tub line? Thanks for the replies.
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Old 01-28-2012, 10:25 AM   #8
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Sewage line and vent design new basement bath


Bring the vent to the end of the run for both the sink and tub
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Old 02-04-2012, 05:17 PM   #9
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Sewage line and vent design new basement bath


The line from the tub to the main sewage line is 9 feet, I don't think I can wait to vent it at the end of the run can I (unless I run 3 inch lines)? For further clarification the large vertical red line is the main vent, the smaller vertical red line on the right is a vent that was added later by someone else for a small basement bathroom that was subsequently torn out. The horizontal red line is the main sewage line going outside the house, the clean out is right below the main vent stack. The main sewage line running out of the house in the basement is pretty deep, that is why I think I can get the required slope in my tub line. I'm rethinking my layout now however, anything to make all that concrete removal easier.

Cheers.

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