I’ve inherited a basement finishing job that I'm unsure of how to vent.
My mom bought a home that was built in 1945, 5 years ago the old homeowner found a crack in the cast iron stack where it entered the concrete floor in the basement and was leaking. It was removed and all plumbing was then replaced with new pex water lines (house also had galvanized water lines at that time) and ABS drains/main stack. Due to the damage from the leak they gutted the basement and were planning to remodel, but never got around to it. When they had the plumbing replaced, they opted to rough in a 2nd bathroom for the house in the basement.
Fast forward 5 years and now this is my problem. I've attached a quick sketch of the layout I'm dealing with. The question I haven't been able to answer is how they planned to vent the new bathroom. Being an older home, the only vent is via the main stack that is between 8' to 14' feet away of the new bath, I have found that they added air admittance valves to the laundry riser and the kitchen sink, so my gut is telling me this was their plan for the basement bath.
In addition to this, they have been pumping a condensate line for the air conditioner through the ceiling to the laundry riser. They're also running the water softener drain the same way. I'd like to remove this line and add in a riser (shown in green) in the utility area by tapping off the shower drain. Is this even possible?
My thoughts are:
1: Vent lav and toilet via air admittance valve in the vanity
2: Vent shower via air admittance valve in wall it shares with linen closet
3: Tie into shower drain with new riser for water softener and condensate pump
Am I heading in the right direction here?
Unfortunately adding a new vent to the system will require some serious surgery and is pretty much off the table unless there is absolutely no other way to make this happen.
Thanks,
M.
My mom bought a home that was built in 1945, 5 years ago the old homeowner found a crack in the cast iron stack where it entered the concrete floor in the basement and was leaking. It was removed and all plumbing was then replaced with new pex water lines (house also had galvanized water lines at that time) and ABS drains/main stack. Due to the damage from the leak they gutted the basement and were planning to remodel, but never got around to it. When they had the plumbing replaced, they opted to rough in a 2nd bathroom for the house in the basement.
Fast forward 5 years and now this is my problem. I've attached a quick sketch of the layout I'm dealing with. The question I haven't been able to answer is how they planned to vent the new bathroom. Being an older home, the only vent is via the main stack that is between 8' to 14' feet away of the new bath, I have found that they added air admittance valves to the laundry riser and the kitchen sink, so my gut is telling me this was their plan for the basement bath.
In addition to this, they have been pumping a condensate line for the air conditioner through the ceiling to the laundry riser. They're also running the water softener drain the same way. I'd like to remove this line and add in a riser (shown in green) in the utility area by tapping off the shower drain. Is this even possible?
My thoughts are:
1: Vent lav and toilet via air admittance valve in the vanity
2: Vent shower via air admittance valve in wall it shares with linen closet
3: Tie into shower drain with new riser for water softener and condensate pump
Am I heading in the right direction here?
Unfortunately adding a new vent to the system will require some serious surgery and is pretty much off the table unless there is absolutely no other way to make this happen.
Thanks,
M.