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    cbutterjr's Avatar
    cbutterjr Posts: 1, Reputation: 1
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    #1

    Jun 29, 2007, 11:03 AM
    Venting an island drain
    I'm relocating a kitchen sink onto an island. The island is "down stream" on the 4" waste line from the existing kitchen sink. Does the island require a separate vent?
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
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    #2

    Jun 29, 2007, 11:35 AM
    Quote Originally Posted by cbutterjr
    I'm relocating a kitchen sink onto an island. The island is "down stream" on the 4" waste line from the existing kitchen sink. Does the island require a separate vent?
    Yes, all fixtures that have a trap will require a vent. A island vent, see image) is a special vent for island sinks. While this drawing says 1 1/2" i would pipe with 2". This drawing gives you a general idea but you don't have to follow it fitting by fitting, just follow the gereral layout. Good luck, Tom
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