Apartment Plumbing Drainage 1

[@beatrizsilvaprieto]

very practical and clear video, Thanks, I am learning a lot from this

[@bimitup]

Thank you Beatriz

[@8acoach]

Thanks for the info, very helpful

[@bimitup]

You are welcome 8a.

[@jayblake682]

Alex,I have a quick question. Do both outlets on the sink family have drainage fixture units corresponding to them. If so, is it double counting the DFU’s? I typically see a double bowl sink using a continuous waste with one p-trap. Thanks so much for these videos. They’re very informative.

[@bimitup]

Hi Jay. Great question! Many times you will find one of the outlets connected with an offset strainer or with an elbow/extend to the tail-piece, so a single p-trap is trapping both sink outlets. The (2) most common configurations are as below: www.homedepot.com/p/1-1-2-in-White-Plastic-Slip-Joint-Sink-Drain-Outlet-Waste-HDC9121AB/316415495 www.homedepot.com/p/Everbilt-1-1-2-in-White-Plastic-Slip-Joint-Sink-Drain-Center-Outlet-Waste-C9123AB/205153786 The downside of that method is that if for some reason your p-trap gets clogged, you are left with a useless sink (until you unclog it); as opposed to when you have 2 p-traps, if you clog one of them, at least you can flow water out of the other bowl. Regarding the fixture units, most codes based on International Building Code (IBC) will call for 2 DFU per sink, regardless of the number of bowls (maybe because the faucet will pour water either in one bowl or the other; so, what I typically do is: - For single bowl sink: I make WFU = 2, so 2 DFU flow out of the only drain outlet connector - For double bowl sink: I make WFU = 1, so 1 DFU flows out of each connector, and by the time they go together down the stack (regardless of the configuration), they add up to 2 DFU. Man, this one got me typing for a while, I might even create a quick video out of it =)

[@jayblake682]

@@bimitup I thought you might have 1 DFU per outlet on the double bowl sink, but I wasn’t sure. Thanks for the reply.

[@bimitup]

@@jayblake682 You are welcome Jay