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Thread: Can I vent two sinks with a single foot vent upstream? thanks

  1. #1
    DIY Junior Member k52's Avatar
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    Default Can I vent two sinks with a single foot vent upstream? thanks

    I have an island sink and it is vented with a foot vent as required. Down stream about 8 ft. from this island sink (and foot vent) I have a kitchen sink against a wall with no opportunity to vent it. (It will be very hard to vent it like I did my island sink). Can it be wet vented using the 3 inch waste line that is from the vented island sink? (another way of asking is) Can the foot vent in an island vent two sinks where one is down stream of the foot vent?

    ALSO There has been some sugestion that the waste from a toilet even further upstream will empty the ptrap in the sink that is vented from the island sink upstream! Is that a problem?

    I can draw a picture if that helps!

    thanks k52

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    In the Trades Tom Sawyer's Avatar
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    what in hell is a foot vent? and yes, draw a picture.
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

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    Forum Admin, Expert Plumber Terry's Avatar
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    ALSO There has been some sugestion that the waste from a toilet even further upstream will empty the ptrap in the sink that is vented from the island sink upstream! Is that a problem?
    Well...........the reason for a proper vent is to prevent the toilet from siphon the traps farther down the line.
    Waiting for the picture.

  4. #4
    Plumber Winslow's Avatar
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    Quote Originally Posted by k52 View Post
    I have an island sink and it is vented with a foot vent as required. Down stream about 8 ft. from this island sink (and foot vent) I have a kitchen sink against a wall with no opportunity to vent it. (It will be very hard to vent it like I did my island sink). Can it be wet vented using the 3 inch waste line that is from the vented island sink? (another way of asking is) Can the foot vent in an island vent two sinks where one is down stream of the foot vent?

    ALSO There has been some sugestion that the waste from a toilet even further upstream will empty the ptrap in the sink that is vented from the island sink upstream! Is that a problem?

    I can draw a picture if that helps!

    thanks k52
    No you cannot do it that way, it requires either it's own standard vent or another island vent setup.

  5. #5
    Moderator & Master Plumber hj's Avatar
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    The question is NOT whether you can do it, but HOW can you do it. The way your question is posted you cannot do it that way.
    Licensed residential and commercial plumber

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