kingcledus
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I am replacing a tub with a walk-in shower and struggling with finding a proper solution to vent the new 2" drain. From reading discussions in these forums I know the old drain was not ran properly, I will spare the details, but I would like some feedback on a couple possible options I have come up with to attempt to fix it properly. I don't think either is perfect, but my options are pretty limited without major destruction.
It is a second story bathroom, drain is a 3" PVC stack. I have a toilet and sink feeding into the 3" stack (each with their own 2" vent) and trying to add another 2" drain. My new shower drain will be located within about 16" from the 3" vertical stack. Here are the options I have come up with (picture included):
1. Connect the arm of my 2" P-trap directly into the 3" stack via san-T. This would be a wet vent situation with a toilet and sink upstream.
2. Add a dry vent before dropping into the stack. Problem is the vent will be a 90 elbow ontop of a San-T and have to run horizontal about 3' to the wall before going vertical. I know I can't tie into another vent until I get above the flood level of the other fixtures, but I wasn't sure about running the vent horizontal for a few feet. It would still be a few inches above the P-trap arm.
Link to drawing:
http://www.ddotsolutions.com/ddot/options.jpg
It is a second story bathroom, drain is a 3" PVC stack. I have a toilet and sink feeding into the 3" stack (each with their own 2" vent) and trying to add another 2" drain. My new shower drain will be located within about 16" from the 3" vertical stack. Here are the options I have come up with (picture included):
1. Connect the arm of my 2" P-trap directly into the 3" stack via san-T. This would be a wet vent situation with a toilet and sink upstream.
2. Add a dry vent before dropping into the stack. Problem is the vent will be a 90 elbow ontop of a San-T and have to run horizontal about 3' to the wall before going vertical. I know I can't tie into another vent until I get above the flood level of the other fixtures, but I wasn't sure about running the vent horizontal for a few feet. It would still be a few inches above the P-trap arm.
Link to drawing:
http://www.ddotsolutions.com/ddot/options.jpg