FalconTime
New Member
I have an improperly drained kitchen sink and utility sink situation that I am cleaning up (including permits and inspections).
I think that my question is specific to Wisconsin plumbing code. To the best of my knowledge, section 905.5 of the UPC explicitly allows a design like shown below (correct me if I am wrong). However, I can not find any clarity in Wisconsin plumbing code if this is allowed or not. Is the following design allowed in Wisconsin (and UPC, for that matter)?
If it is not allowed, I think could add a vent stack that starts with a wye connection below the washer standpipe sanitary tee. I believe this could be a double wye connection, with the other side serving the utility sink drain per SPS 382.31(4)(b)(1), which states: "The connection of the vent stack to a drain stack shall be at or below the lowest branch drain connection to the drain stack." I know it's not an ideal design, but if the first option doesn't work, it lets me keep the utility sink at a standard height and prevents problems with the standpipe top and trap heights.
Any answers to the bolded question above and the alternative approach if it is not allowed would be greatly appreciated. I haven't posted here before, but this forum has been a great help to me when it came to supply line sizing and a shower install.
I think that my question is specific to Wisconsin plumbing code. To the best of my knowledge, section 905.5 of the UPC explicitly allows a design like shown below (correct me if I am wrong). However, I can not find any clarity in Wisconsin plumbing code if this is allowed or not. Is the following design allowed in Wisconsin (and UPC, for that matter)?
If it is not allowed, I think could add a vent stack that starts with a wye connection below the washer standpipe sanitary tee. I believe this could be a double wye connection, with the other side serving the utility sink drain per SPS 382.31(4)(b)(1), which states: "The connection of the vent stack to a drain stack shall be at or below the lowest branch drain connection to the drain stack." I know it's not an ideal design, but if the first option doesn't work, it lets me keep the utility sink at a standard height and prevents problems with the standpipe top and trap heights.
Any answers to the bolded question above and the alternative approach if it is not allowed would be greatly appreciated. I haven't posted here before, but this forum has been a great help to me when it came to supply line sizing and a shower install.