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Need help planning DWV for basement laundry room
Hi,
I'm adding a laundry room to my finished basement, and need some help/advice planning for the drains before I start breaking my slab. My planned space is roughly 88" x 61"; I know - a tight squeeze for a laundry room. I'm planning to put washer/ dryer on one wall of the room, sink on the opposite wall, and a 30" door in the middle. I can relatively easily plumb a 4" main drain into the room under the washer. I am thinking that it would make for a good place to put a BWV as I can easily hide the access panel under the It would tie into the main 4" running under my slab just outside my basement bathroom and just before the BWV that protects the bathroom fixtures (hence the desire for another BWV in this room). I was also thinking a floor drain in the middle of the room would make sense as well, being a laundry room and all. My question / issue is that I am not sure how to run all the lines safely and to code (am in Montreal, Canada). From what I understand, I need a wet primer for the floor drain. Am I allowed to put the 3 fixtures (floor drain, sink and washer) all behind the BWV? If so, I assume that the sink/washer would act as the wet primer for the floor drain. However, can the washer foam out the floor drain due to the extra pressure it needs to clear the BWV? If I am allowed, what is the best way to run the required drain lines coming from the 4" BWV? I've attached a pic to give you a better idea of the space layout, and my initial idea for the BWV placement. BTW, the BWV inlet would be about 9-8" below the slab at this point. I've tried to sketch out what I think would make sense for plumbing, but I have no idea if this is appropriate or not. I realize that I have no vent in this room, so was considering using a SureVent under the sink. My logic being that it would vent the washer pipe at the same time since it is "above". If this generally okay, does it matter that the floor drain doesn't have its own vent? Thanks, Eric |
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