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    johnwi3's Avatar
    johnwi3 Posts: 55, Reputation: 1
    Junior Member
    		  
    #1

    Mar 20, 2008, 03:02 PM
    New drain system
    Am I correct with the following drain sizes:
    Bathroom sinks 1 1/2 drain w/ 1 1/2 vent
    Kitchen sink 1 1/2 drain w/ 1 1/2 vent
    Stand up shower 2" drain w/ 2" vent
    Toilet 3" drain with 2" vent
    Shower/tub 2" reduced to 1 1/2 with 1 1/2 vent

    Also, what does anyone recommend when plumbing drains into a horizontal stack?
    Will tees be OK or are you better off with wyes?
    Thanks
    massplumber2008's Avatar
    massplumber2008 Posts: 12,832, Reputation: 1212
    Senior Plumbing Expert
    		  
    #2

    Mar 20, 2008, 03:08 PM
    Hi Johnwi3:

    Bathroom sink... correct
    Kitchen sink... correct by code (BUT, I run all kitchen sink waste lines 2"/1.5"vent)
    Shower............2" drain... only need 1.5" vent
    Toilet... correct
    Shower/tub combo... correct

    Tees are not allowed to pick up waste on horizontal pipes EVER!! SO, use wyes! You can use tee fittings for vents.

    Making progress I see... ;) Let me know your thoughts. Mark

    .
    johnwi3's Avatar
    johnwi3 Posts: 55, Reputation: 1
    Junior Member
    		  
    #3

    Mar 20, 2008, 04:44 PM
    Thanks,
    Progress is slowing happening. The 4" main drain you guided me on is inspected and passed. In the process of working on the 3" stacks to the bathroom, trying to dry fit everything before I glue it all. I'll post some pictures when I get it pieced together... Thanks again for the help, I'm sure I'll need more.
    massplumber2008's Avatar
    massplumber2008 Posts: 12,832, Reputation: 1212
    Senior Plumbing Expert
    		  
    #4

    Mar 20, 2008, 05:01 PM
    We are here when you need... Goodnight!
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