Ask Experts Questions for FREE Help !
Ask
    4diyman's Avatar
    4diyman Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Aug 25, 2012, 10:56 AM
    Can sinks on two floors share a drain
    Can a bathroom sink on two floors (one above the other) share a 1-1/2 inch drain pipe?
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #2

    Aug 25, 2012, 11:15 AM
    Yes, if both are trapped and vented. Good luck, Tom
    massplumber2008's Avatar
    massplumber2008 Posts: 12,832, Reputation: 1212
    Senior Plumbing Expert
    		  
    #3

    Aug 25, 2012, 12:46 PM
    Like Tom said, yes, two sinks on different floors can use the same drain line, BUT the sink on the top floor can't just connect into the vent from the sink below and that may complicate things for you... ;)

    Why are you asking this question... installing a sink upstairs or what?

    Back to you...

    Mark
    4diyman's Avatar
    4diyman Posts: 3, Reputation: 1
    New Member
    		  
    #4

    Aug 25, 2012, 06:50 PM
    Thanks to Tom and Mark for your answers.
    Mark, I'm adding a bathroom in the basement which includes a sink. I can use another available vent for the sink in the basement and will use a proper trap as suggested by Tom.

    Thanks again!
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #5

    Aug 26, 2012, 07:40 AM
    I can use another available vent for the sink in the basement
    How far away from the sink is this vent? Is this "vent" a dry vent or is some other fixture draining into it from above? Let me know Tom
    4diyman's Avatar
    4diyman Posts: 3, Reputation: 1
    New Member
    		  
    #6

    Aug 26, 2012, 07:27 PM
    Quote Originally Posted by speedball1 View Post
    How far away from the sink is this vent? Is this "vent" a dry vent or is some other fixture draining into it from above? Let me know Tom
    Turns out the 1-1/2 in pipe is a dry vent that leads to a 2" drain pipe in the floor below. The sink above uses a different drain pipe.

    This existing line should be perfect for the basement sink.

    Thanks again for your advise.
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #7

    Aug 27, 2012, 05:20 AM
    How far away from the sink is this vent? Let me know, Tom
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Is there a problem using one drain for two sinks? [ 1 Answers ]

Current bathroom vanity has one sink want to add another using same water lines and drain

Kitchen sinks won't drain at all [ 1 Answers ]

My double kitchen sink was a slow drain that has turned into a sink that does not drain at all. Help! If it is a venting problem where exactly do I look for a vent or an air admittance valve? These were mentioned in previous articles.. which is great if you know what and where they are! :) We...

My bathroom sinks will not drain [ 1 Answers ]

Help, the doulble lavatory in my kids bathroom will not drain. I have tried the small plunger and when I plung one, the water will fill up more in the other sink. Can you help me. Thanks, The woodlands, Texas

Can a toilet and a floor drain share a drain line? [ 1 Answers ]

Hello, Right now we have a main 4" cast iron sewer pipe running under our basement floor. The very last fixture on the run is a toilet. Can I remove the toilet, replace the final 90 degree elbow with a tee and replace the toilet in the same place, then extend the line a couple feet further and...

Slow drain both toilets, sinks, everything [ 2 Answers ]

I am fearing that in an effort to save time, I plugged up the mainline. I flushed some clumping kitty litter. It plugged the toilet. I plunged it like a hundred times. It freed. Fine for a couple days. Then, toilets fill up, don't go down right away. In the upstairs bathroom, if you...

View more questions Search