Greeting! I need some advice on my basement wet bar plumbing. I'm working on the rough in now and will use 1 and 1/2 inch schedule 40 PVC as the web bar sink drain pipe. The sink is about 7ft away from my utility room where the 4 inch main drain pipe goes into ground sewage (see the red circle in photo). I plan to route the 1-1/2" sink drain horizontally (the black line) to the utility room and tie in to the main stack. I will use an air admittance valve at the sink to protect the p-trap from being siphoned. I went to homedepot and found two fittings (wyv vs a tee) that might work for me. Here are my questions:
1. Is it even allowed to tie the sink drain to the main line like this? I do want a bar sink but definitely don't want all the "junks" leaving the house to possibly get in the sink since it is at the basement low point. My plan is to add a one way check valve to mitigate it. If Q1 is a no no, then I'd have to use a drain pump.
2. If Q1 is yes, then should I use a wye+1/8 bend or a sani-tee fitting to tie in my sink drain? I personally like wye, but saw something like wye+1/8 bend is prohibited for siphoning the p-trap. But in my case, I have a AAV, would it be acceptable?
Thanks for your input!
1. Is it even allowed to tie the sink drain to the main line like this? I do want a bar sink but definitely don't want all the "junks" leaving the house to possibly get in the sink since it is at the basement low point. My plan is to add a one way check valve to mitigate it. If Q1 is a no no, then I'd have to use a drain pump.
2. If Q1 is yes, then should I use a wye+1/8 bend or a sani-tee fitting to tie in my sink drain? I personally like wye, but saw something like wye+1/8 bend is prohibited for siphoning the p-trap. But in my case, I have a AAV, would it be acceptable?
Thanks for your input!
