farmerisland
New Member
Hello,
This is an update/new question from my last post. My home has old all copper DWV from 1960 and earlier, with even older cast iron at basement level-down, that I'm replacing with PVC. Plumbing noise isn't an issue; I really don't want to do expensive cast. The current copper has pinholing.
My question today though is, since I'm opening up the floor to remodel in a bigger upstairs bathroom, and it's going to be all new lines, if this is my opportunity to fix a multi generational venting issue. I realize I'll have to probably have to cut open some lath & plaster to do so. I've attached a current diagram for reference.
Where I live rurally, I have zero code inspection to worry about, but I want to do the project right, having everything work correctly. I have attached a diagram I drew that shows how the current upstairs bath (1960) dumps right into the main stack, which is how the main floor bath (1945) vents up through the roof.
What is the best way to fix this? Would it be better/easier to run a separate waste line from upstairs down to below the main floor to tie in? Or is it better to keep the same main stack as drain for upstairs, but run a new vent pipe up from main floor bath fixtures, tying together in attic? If I can limit vent stacks through wet venting I will. Obviously this current dropping from floor to floor is not proper. I've commonly had problems with dry traps, sewer gas, and vent gurgling.
This is an update/new question from my last post. My home has old all copper DWV from 1960 and earlier, with even older cast iron at basement level-down, that I'm replacing with PVC. Plumbing noise isn't an issue; I really don't want to do expensive cast. The current copper has pinholing.
My question today though is, since I'm opening up the floor to remodel in a bigger upstairs bathroom, and it's going to be all new lines, if this is my opportunity to fix a multi generational venting issue. I realize I'll have to probably have to cut open some lath & plaster to do so. I've attached a current diagram for reference.
Where I live rurally, I have zero code inspection to worry about, but I want to do the project right, having everything work correctly. I have attached a diagram I drew that shows how the current upstairs bath (1960) dumps right into the main stack, which is how the main floor bath (1945) vents up through the roof.
What is the best way to fix this? Would it be better/easier to run a separate waste line from upstairs down to below the main floor to tie in? Or is it better to keep the same main stack as drain for upstairs, but run a new vent pipe up from main floor bath fixtures, tying together in attic? If I can limit vent stacks through wet venting I will. Obviously this current dropping from floor to floor is not proper. I've commonly had problems with dry traps, sewer gas, and vent gurgling.