Plumbing vent through cold air vent??

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  #1  
Old 03-26-07, 01:14 PM
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Plumbing vent through cold air vent??

I have to run a plumbing vent clear across my basement. Would it be a problem to cut open my cold air return duct and run the plumbing vent inside the duct?

thanks....
 
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Old 03-26-07, 03:15 PM
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Why would you do that?
 
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Old 03-26-07, 03:20 PM
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Just thought it might be easier than drilling holes in 50 studs to across the basement....
 
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Old 03-26-07, 04:45 PM
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But this sounds like you are crossing the joists. If cold air returns similarly cross the joists they hang down below the joists. (Therefore your new pipe could hang right next to it.) If you plan on crossing one joist, let's say, in order to then go upwards some and enter a cold air return up inbetween the joists...then all you'd have to do is pick another joist cavity and go in between IT.

You already know what an inspector would say, I bet. They'd say something like, ..."if the pipe broke and the HVAC was on, gas could be transmitted throughout the entire house".
 
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Old 03-26-07, 06:55 PM
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Where I am this is strictly forbidden.
Plumbing vents carry potentially poisonous
gasses.
 
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Old 03-27-07, 10:36 AM
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Vent thru cold duct

Bad idea, sorry.
 
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Old 03-27-07, 04:51 PM
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OK - I will ditch that idea. I could run it beside the duct but I was trying to make the soffit as small as possible....

Maybe I will drill the 30 or 40 holes and go through the outside wall then.....
 
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Old 03-27-07, 05:41 PM
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So in essence, you would drill all those holes, weakening the floor some, simply to make the box-out around the already hanging-down cold air return, as small as possible? And that is the reason for not hanging the pipe next to it? If it were me, I'd choose not to drill holes out of my joists. Who is going to care if your soffit is 16 inches wide or 19 inches wide?
 
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Old 03-27-07, 05:50 PM
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Don't put so much energy and time into a project like that. Like dave said, don't weaken your walls, just run it along your duct work. It will be best in the end. Not to mention you will need 30+ coupling and make 30+ cuts just to put it in the wall!
 
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