Three Sinks, One Drain?

Users who are viewing this thread

thegallery

Member
Messages
31
Reaction score
0
Points
6
Location
Philly, Europe
I'm way ahead of myself, but I'm just buying a place that has a finished basement with a separate entrance. So I'm considering putting in a mini kitchen and bathroom as an 'in-law' suite. I'll have plenty of questions in this regard down the line...

But right now I'm wondering if I can drain three sinks into one drain hole? There is only one drain for the laundry deep sink in the basement now. But the way I'm seeing the layout I could actually have the kitchen sink, the bathroom sink, and the deep sink all adjacent to each other (in the corners of their respective rooms). Center line to the drains would all be within 30" of each other. Could I utilize the one deep sink drain line to drain them all? Even perhaps a dishwasher too?

I plan to use an up-flush system for the toilet and shower, though everything will be very close the the main drain of the house. I don't know how deep it goes but I know the deep sink drain ties into it below ground. If I find out I can dig out a trench and hook it up, to code, relatively easily I will, but my guess the the up-flush will be best.... ahead of myself again...
 

Geniescience

Homeowner
Messages
2,137
Reaction score
4
Points
0
Location
humid summers hot, humid winters cold
DFU's, and venting

Check out Drain Fixture Units (DFU). This will answer your question. You have to measure the inside diameter of the drain pipe, easy to do if you measure the circumference of the pipe and post that information here.

The bigger question, after you get your "Yes" answer, is how you will bring sufficient venting to the drains. More drains, more vents needed, to prevent having one draining fixture suck water out of the adjacent P traps and therby allow sewer gases to come back up the drain and into the house.

david
 

hj

Master Plumber
Messages
33,600
Reaction score
1,037
Points
113
Location
Cave Creek, Arizona
Website
www.terrylove.com
drains

There is no correct answer to your question until you show us how you plan to make the connects, otherwise the answers will be YES, NO, or MAYBE, it all depends on how you finish the job.
 
Top
Hey, wait a minute.

This is awkward, but...

It looks like you're using an ad blocker. We get it, but (1) terrylove.com can't live without ads, and (2) ad blockers can cause issues with videos and comments. If you'd like to support the site, please allow ads.

If any particular ad is your REASON for blocking ads, please let us know. We might be able to do something about it. Thanks.
I've Disabled AdBlock    No Thanks