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WaldenL · 01-16-2009, 01:41 PM

Dumb question here... Any reason the OP couldn't just vent the kitchen sink out the sidewall by the sink? (Might be aesthetic reasons, I'm looking for a plumbing one) Must the vent go vertically through the roof? I don't see why.

ponch37300 · 01-16-2009, 02:38 PM

The vent is on the drain side of the trap so it would let out any/all sewer gases which i don't think anyone would want to walk by their house and smell sewer gases or open the window and have the house smell like a sewer.

Wildie · 01-16-2009, 04:10 PM

Quote:

Originally Posted by Nestor_Kelebay

Your drawing shows a 22 1/2 degree elbow on a 1 1/2 inch drain line.

I understand that you might need a 45 to get the vent vertical. My point is that I've never seen a 22 1/2 degree elbow in the smaller plastic pipe sizes like 1 1/2 inch. Do they exist?

Look again Nestor, it takes a 180 degrees to reverse direction. There's one 90 at the the top, so the other two must be 45's!

Wildie · 01-16-2009, 04:16 PM

Quote:

Originally Posted by ponch37300

Thanks for all the help guys. I think i understand most of it now. I made a little drawing(I'm definitely not an artist!) of a two story house with a toilet on each level by the main stack. Then the kitchen sink on the other side. When i vent the kitchen sink can i tie into the main stack in between the 1st floor and 2nd floor or is this considered wet venting and not good? Should i just run the sink vent up to the attic and tie into the main stack above all the drains? Also if i have a sink in the 1st floor bathroom how would i vent that? Can i tie it into the main stack on the 1st floor or would this also be wet venting? Or do i have to run this all the way up to the attic and tie into the main stack above the drains for the 2nd floor fixtures? Thanks again for your knowledge

A vent should not connect to the main stack, where excrement passes by! Some will find its way into the vent and eventually the vent will plug!

ponch37300 · 01-16-2009, 05:15 PM

Thanks wildie..Is that considered wet venting? So my best option would be to run the vent to the attic and then tie into the main stack or use a mechanical vent?

Wildie · 01-16-2009, 05:40 PM

Quote:

Originally Posted by ponch37300

Thanks wildie..Is that considered wet venting? So my best option would be to run the vent to the attic and then tie into the main stack or use a mechanical vent?

Yes! annnd Yes!

I have used mechanical venting, and they work well also!