Al G.
New Member
My basement has a typical 3-piece bathroom rough-in. The vanity and toilet are along one wall and the bathtub drain is along the opposite wall. The stub out for the vanity tees into a 2" PVC that goes into the floor and a 1 1/2" PVC extends vertically to tie in with the vent in the laundry room above (confirmed with pre-drywall photos). The bathtub drain is a 2" PVC that extends about 3" up from a plastic housing/cover embedded in the concrete. I cut open the plastic and the PVC goes into crushed stone about 8" below floor level. No trap in sight. The center of this pipe is about 63" from where the finished wall will be on the vanity/toilet side. Seems a little far but manageable.
Would the bathtub trap typically be below the crushed stone? I'm a little hesitant to cut the cap off the pipe to check just yet since so little extends above the floor. I assume there is a trap and that the entire bath is vented by the vent extending up from the vanity drain. Is that reasonable? If I understanding venting correctly, if there is a trap then I can't run a vent upward from the PVC since it would be upstream of the trap. Thus my assumption that it's wet vented from the other vent pipe. If there's not a trap then would I put the trap in the floor cutout, tee into the 2" PVC and then extend the vent upward to tie in with the other vent pipe?
I'm considering putting in a shower instead of a tub. Can I put in a short horizontal (with proper slope) and then turn to vertical within the floor cutout, thus putting the shower drain toward one end of the shower? Alternatives would be to run the horizontal above the floor to the center of the shower pan, requiring the shower floor to be a step up from the main floor, or to cut into the concrete to run the horizontal just below floor level.
I appreciate your thoughts.
Would the bathtub trap typically be below the crushed stone? I'm a little hesitant to cut the cap off the pipe to check just yet since so little extends above the floor. I assume there is a trap and that the entire bath is vented by the vent extending up from the vanity drain. Is that reasonable? If I understanding venting correctly, if there is a trap then I can't run a vent upward from the PVC since it would be upstream of the trap. Thus my assumption that it's wet vented from the other vent pipe. If there's not a trap then would I put the trap in the floor cutout, tee into the 2" PVC and then extend the vent upward to tie in with the other vent pipe?
I'm considering putting in a shower instead of a tub. Can I put in a short horizontal (with proper slope) and then turn to vertical within the floor cutout, thus putting the shower drain toward one end of the shower? Alternatives would be to run the horizontal above the floor to the center of the shower pan, requiring the shower floor to be a step up from the main floor, or to cut into the concrete to run the horizontal just below floor level.
I appreciate your thoughts.