BurleyMike
New Member
Here are a couple pictures of the sewer lines in my dad's crawlspace. We are having a debate about venting. The shower drains into the line coming from the washing machine stand pipe. There is a vent on the roof above the laundry room which also has a shower in it. From my understanding you cannot use the washing machine line even though it is vented as a vent since when the washing machine is draining it could siphon the trap on the shower dry?
The second photo shows the line coming from the bathtub which only has a S trap on it. My dad says since it is so close to the main stack the main stack will act as a vent. I don't believe that works since the main stack has the toilet draining into it.
The second photo shows the line coming from the bathtub which only has a S trap on it. My dad says since it is so close to the main stack the main stack will act as a vent. I don't believe that works since the main stack has the toilet draining into it.