TechInstructor
Member
My tub drain (from a clawfoot tub) will be located only a few inches away from the branch drain. I had my plans reviewed by the county inspector and he told me that I didn't need a vent on that drain. Since there's no vent, I'm not sure of the correct fittings to use to connect from the trap to the horizontal branch drain.
I've considered doing this.
The wye on the left will be part of the branch drain. The trap would have a horizontal pipe connected it to the 45 elbow that is connected to the wye on the right. (Sorry, I didn't have any short pipe to dry fit into the joints so you have to imagine that the pipe is there.)
The problem with this plan is that the trap weir may be more than 24" (vertical distance) from the tub drain. It may fall within the parameters, but I"m trying to have a contingency plan ready in case it doesn't.
One option I've considered is to rotate the wye, thereby raising the height of the connection. However, I'm concerned if by doing so, I would be creating some sort of S-trap.
Like this (only the branch drain location would be on the left, not on the right)
****
Another option would be to locate the trap higher up, and then use a LS 90 elbow to connect into the branch drain. However, would this not be considered an S-trap?
What is the minimum horizontal distance from a trap, before a LS elbow can turn to vertical without creating an S-trap?
Are there any other fittings that I can use to connect the tub drain to the horizontal branch without using a Sani-tee and vent?
Thanks in advance for your advice.
PS. I am aware that this pipe is over-sized (2" trap to 3" line) for the job. Just didn't think sizing up would hurt anything.
I've considered doing this.
The wye on the left will be part of the branch drain. The trap would have a horizontal pipe connected it to the 45 elbow that is connected to the wye on the right. (Sorry, I didn't have any short pipe to dry fit into the joints so you have to imagine that the pipe is there.)
The problem with this plan is that the trap weir may be more than 24" (vertical distance) from the tub drain. It may fall within the parameters, but I"m trying to have a contingency plan ready in case it doesn't.
One option I've considered is to rotate the wye, thereby raising the height of the connection. However, I'm concerned if by doing so, I would be creating some sort of S-trap.
Like this (only the branch drain location would be on the left, not on the right)
****
Another option would be to locate the trap higher up, and then use a LS 90 elbow to connect into the branch drain. However, would this not be considered an S-trap?
What is the minimum horizontal distance from a trap, before a LS elbow can turn to vertical without creating an S-trap?
Are there any other fittings that I can use to connect the tub drain to the horizontal branch without using a Sani-tee and vent?
Thanks in advance for your advice.
PS. I am aware that this pipe is over-sized (2" trap to 3" line) for the job. Just didn't think sizing up would hurt anything.