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Thanks Wayne for all the thoughts! Here are some follow ups from me on them. Correct, no irrigation. I agree that 35 gpm seems high and I was simply basing that off of the Chart A 103.1(2) that provides a conversion from water fixture supply units to GPM. However, I have since started to read...

Hi, My two main questions are: 1. Which of the Appendix A 105.1 charts would I use for PEX pipe? 2. Do the below calculations seem correct? :) I'm in Seattle where the city uses the UPC with some local changes (2021 Seattle Plumbing Code) and, for a large 2-unit residential remodel...

Point noted about the kitchen sink/laundry vent size - thanks! For the change from 2" to 3" for the wet vent, I was reading this section: 908.2.2 Size. The wet vent shall be sized based on the fixture unit discharge into the wet vent. The wet vent shall be not less than 2 inches (50 mm) in...

Thanks for the feedback Wayne. Here is an updated version that also shows the kitchen/laundry (and a basement utility sink) that you asked about. I just used Microsoft Paint to make the diagrams. I'm sure there is a fancier way but Paint is pretty simple to use and gets the job done. Also, I...

I'm planning my drain/vent system for a remodel of my house. Since I'm in Seattle, I'm using this resource https://www.kingcounty.gov/depts/health/environmental-health/piping/plumbing/~/media/depts/health/environmental-health/documents/plumbing/horizontal-wet-venting.ashx which calls out the...