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 Soil stack with two WC on different floors
Author: walldocmp (ME)

Would it be acceptable to have two WC on different floors on a 3" soil stack with no vent off the toilets other then the soil stack. Here is picture of what I mean.


Thanks for the help.

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 Re: Soil stack with two WC on different floors
Author: hj (AZ)

NO!!!!

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 Re: Soil stack with two WC on different floors
Author: packy (MA)

drain the shower into the toilet pipe and it will be fine.
if you have the height, put a san tee into the vertical toilet riser.
keep the shower vent 2 inch as well.

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 Re: Soil stack with two WC on different floors
Author: walldocmp (ME)

Thanks for the quick response. So I need a 2" vent for the first floor WC but the 2nd floor WC can just use the stack as its vent correct? Not sure if a can get the shower drain to the toilet drain. But just to clarify is this what you mean?

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 Re: Soil stack with two WC on different floors
Author: packy (MA)

that would do it. but if the shower is on that side you could put a Y into horizontal part of the toilet drain. i suggested draining into the vertical because if the shower were on the left side then you would have to make a 180 deg turn to tie into the horizontal.
anyway, it is always much easier to draw lines on a paper than it is to actually install the pipes so they look like those lines.

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 Re: Soil stack with two WC on different floors
Author: walldocmp (ME)

Thanks again. One last question for now. If I put a y into the horizontal section of the toilet drain to connect the shower does the y have to be tilted so it comes in at 45 degrees above the horizontal or is horizontal ok.

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 Re: Soil stack with two WC on different floors
Author: packy (MA)

horizontal, while not being perfect, is OK since the branch is washed by the draining shower water.

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 Thanks for the help! :)
Author: walldocmp (ME)

Thanks for the help!



Edited 1 times.

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