Question for the plumbers on the forum. I am removing a bath tub and replacing it with a free standing tub. The existing vent line connection was hidden behind the tub and did not stay entirely within the wall and the joist bay. With the new tub this will be exposed so i want to run the vent under the floor and entirely within the wall.
Here is what it currently looks like. For some reason, not sure why, they had the vent stack bump out 45 from the wall and then Y into the drain line as shown. What I want to do is take almost this same setup in regards to the 2" to 1 1/2 reducing tee but move it down the 2" drain line a few inches and rotate it to the left 90 degrees. Then have the tub drain run off the Y and have the vent line just connect inline with the drain line. This will keep it under the floor, within the joist bay then i will come up through the bottom plate and connect to the vent line where its already in the wall.
I also wont need the two tub drain connections since the new tub has the overflow drain connecting to the main bottom drain with in the tub. Similar to how a bathroom sink works. So i will just run the p trap under the tub and not have the additional 1 1/2" line running up to connect to the overflow.
My change seems simple and straight forward and keeps air behind water the whole way. I am not changing the pitch of the drain line. I just want to eliminate the Y from running up.
Does this seem correct? Am I missing something? If I am not explaining this correctly let me know. The only reason i am wondering is my way seems easier than what they had originally done so i am not sure why they did it the way they did. Seems like all they avoided was drilling a hole in the bottom plate. Your thoughts?
Here is what it currently looks like. For some reason, not sure why, they had the vent stack bump out 45 from the wall and then Y into the drain line as shown. What I want to do is take almost this same setup in regards to the 2" to 1 1/2 reducing tee but move it down the 2" drain line a few inches and rotate it to the left 90 degrees. Then have the tub drain run off the Y and have the vent line just connect inline with the drain line. This will keep it under the floor, within the joist bay then i will come up through the bottom plate and connect to the vent line where its already in the wall.
I also wont need the two tub drain connections since the new tub has the overflow drain connecting to the main bottom drain with in the tub. Similar to how a bathroom sink works. So i will just run the p trap under the tub and not have the additional 1 1/2" line running up to connect to the overflow.
My change seems simple and straight forward and keeps air behind water the whole way. I am not changing the pitch of the drain line. I just want to eliminate the Y from running up.
Does this seem correct? Am I missing something? If I am not explaining this correctly let me know. The only reason i am wondering is my way seems easier than what they had originally done so i am not sure why they did it the way they did. Seems like all they avoided was drilling a hole in the bottom plate. Your thoughts?
