Installing utility sink next to washer/dryer
Asked Dec 28, 2008, 05:23 AM
I know this topic has been covered extensively, not only here but all over the web. The problem is that there is so much conflicting information out there. I have gathered the following from what I have read here. 1) It seems that if I want to do this by code, I can not just tap into the washer stand pipe, even though it has a trap and a vent, I would need to create a separate drain line and tap into the vent stack. Also I have read that I may be able to meet code tapping into the washer standpipe as long as I don't put a trap on the sink since this would create a double trap situation. The risk with this would be water backing into the sink basin during wash cycles. Correct me if I'm wrong with these assumptions. I have enclosed 3 pics of my situation. It is a 5 year-old house and the laundry area is in the basement as seen in the photos. The first pic shows the drain stack (vertical 5") on the left, the vent stack (Vertical 2")in the center and the washer stand pipe to the right. The second pic shows the sink where it will sit and the third pic shows the view from the sink drain point toward where it would need to connect. I am a very capable diy'er but plumbing is certainly not my strongest suit. I want to meet codes with this install and also I am not thrilled about water backing up into the sink basin during the wash cycle. So my question is; Looking at my pics, what is the best way to add a drain for my utility sink?