Squints2See
Member
Hello all,
I am helping a friend rough in the plumbing for a basement bathroom. There was an existing bathroom there but he had to terror out the entire concrete floor and start over due to broken pipes underneath the concrete.
I have poorly drawn a mockup of what I am looking to do. I have researched things as best as I can and have found out that in my neck of the woods the 2009 IPC is what is used. However, there are no inspections done where my friend lives, so although I do want the plumbing to perform properly, I will not have to contend with a picky inspector.
Based on my research (and I apologize in advance if I get some of this wrong) the IPC does allow wet venting with one vent for two bathroom groups as long as it is on the same floor, which this is. And I seem to recall reading that based on a 3" drainline, the furthest fixture can be up to 12' away from the vent. (Im not sure I am understanding that right though; Table 906.1 of the IPC)
So here are my questions:
1. Would it be better to have the toilet directly inline with the drain, (using a 3"x3"x2" tee-wye) or have it branching off of the main drain as shown in the optional placement in the drawing?)
2. Should I go with my original plan of having two vents coming together (as shown in purple), or can i use one 2" vent (as shown in the dashed green) as long as it is placed close enough that it is within 12' of the farthest fixture?
3. Is it better to have the vent upstream from the toilet (as indicated in the purple option), or downstream from the toilet?(as indicated with the dashed green option)
4. Could I use 1 1/2" line for the vents instead of 2" if I do the vent placement shown in purple?
The main drainline will be 3", and will tie into the 4" drain that currently exists and exits the house. The floor drain, shower floor drain, and washer drain will be 2", as well as the sink and the utility sink until it gets to the p-trap.
All help (especially sooner than later!) would be greatly appreciated, as I am starting this Saturday morning.
Thanks again,
I am helping a friend rough in the plumbing for a basement bathroom. There was an existing bathroom there but he had to terror out the entire concrete floor and start over due to broken pipes underneath the concrete.
I have poorly drawn a mockup of what I am looking to do. I have researched things as best as I can and have found out that in my neck of the woods the 2009 IPC is what is used. However, there are no inspections done where my friend lives, so although I do want the plumbing to perform properly, I will not have to contend with a picky inspector.
Based on my research (and I apologize in advance if I get some of this wrong) the IPC does allow wet venting with one vent for two bathroom groups as long as it is on the same floor, which this is. And I seem to recall reading that based on a 3" drainline, the furthest fixture can be up to 12' away from the vent. (Im not sure I am understanding that right though; Table 906.1 of the IPC)
So here are my questions:
1. Would it be better to have the toilet directly inline with the drain, (using a 3"x3"x2" tee-wye) or have it branching off of the main drain as shown in the optional placement in the drawing?)
2. Should I go with my original plan of having two vents coming together (as shown in purple), or can i use one 2" vent (as shown in the dashed green) as long as it is placed close enough that it is within 12' of the farthest fixture?
3. Is it better to have the vent upstream from the toilet (as indicated in the purple option), or downstream from the toilet?(as indicated with the dashed green option)
4. Could I use 1 1/2" line for the vents instead of 2" if I do the vent placement shown in purple?
The main drainline will be 3", and will tie into the 4" drain that currently exists and exits the house. The floor drain, shower floor drain, and washer drain will be 2", as well as the sink and the utility sink until it gets to the p-trap.
All help (especially sooner than later!) would be greatly appreciated, as I am starting this Saturday morning.
Thanks again,
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