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Old 01-29-2016, 05:14 PM   #1
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Is this a vent or an additional drain?


Hi all,

I just bought this new home and had to expose laundry outlet box for a leaky stem that I was going to replace and found black MOLD..which sucked to say the least. But that isn't why I am here.

The laundry outlet box has two holes popped out for the drain, with one having a drip line from something in the attic, I assume AC coils (I live in AZ so that stuff is in the attic).

The laundry is below a bathroom which is the stack on the right. It branches over to the laundry outlet and splits into two. Is one of those required for a vent? or are they both drains one for the drip and one for the laundry? If it is vent I want to put in a new outlet box but only have one drain so I would extend the other up and install a studor vent. If it is just a drain for the drip I might extend it up and make sure the copper drip line is inside the drain and put it behind the drywall and only expose one drain.


Any help on what my configuration looks like it is doing would be helpful.

Thanks!


Sean
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Old 01-29-2016, 05:25 PM   #2
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you are correct on the 2 drains, but you dont want to hide anything behind the wall, can you drill the new washer box to fit a second drain? or get a second drain box? the way that is plumbed out is not code for my area....
PS now i have a crook in my neck trying to look at a sideways picture..LOL...
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Old 01-29-2016, 05:26 PM   #3
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Need a picture from the other side. HVAC drains are not supposed to be tied directly into DWV. If you ever get a backup, the waste will end up in the drip pan.



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Old 01-29-2016, 05:31 PM   #4
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I uploaded it the right way I don't know it is side ways!
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Old 01-29-2016, 05:32 PM   #5
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Thank you. I am not sure it is it the HVAC or not, but I don't know what else it would be. Above the laundry is 2nd floor bathroom and above that is HVAC. I also have a drain out the side of the house for the HVAC. It could be something that isn't even used anymore since I got a new HVAC system. Could be leftover from when they built it in 1997.

I will get you a pic from the other side.
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Old 01-29-2016, 05:33 PM   #6
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condensate drain is not tied in there is proper air gap...wow I can see it better now...lol
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Old 01-29-2016, 05:35 PM   #7
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So because it has space above the drain it is ok to have the condensation drain there because it is DWV over flows it won't go up the condensation drip line?
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Old 01-29-2016, 05:36 PM   #8
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if that pipe coming into the washer box is not used anymore you can cut it out and tie one drain into the new box and cap the other with a glue cap or fernco cap..
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Old 01-29-2016, 05:37 PM   #9
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Quote:
Originally Posted by Smahoney6 View Post
So because it has space above the drain it is ok to have the condensation drain there because it is DWV over flows it won't go up the condensation drip line?
100% correct
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Old 01-29-2016, 05:39 PM   #10
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Correct. If I can prove it isn't used anymore. That is what I have to figure out...if i can't figure it out I will leave it because I don't want to cut and cap it is used, whether incorrectly or not, I don't want water in the walls.

This is all extremely helpful, thank you so much. I thought they were both drains cause the main stack has the vent and it is at the bottom of the line so I won't suck out a p trap.
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Old 01-29-2016, 05:46 PM   #11
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grab a short piece of rubber tubing and hold it up to that pipe and give a blow, see if you feel any resistance , if not have someone go into the attic and listen for sound to see if you can locate it..
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Old 01-29-2016, 05:54 PM   #12
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Quote:
Originally Posted by ShtRnsdownhill View Post
grab a short piece of rubber tubing and hold it up to that pipe and give a blow, see if you feel any resistance , if not have someone go into the attic and listen for sound to see if you can locate it..
Great idea. I will do that this weekend.
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Old 01-29-2016, 06:14 PM   #13
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Just extend the condensate drain from the attic into the opening of the pipe. That is called and air break and is code compliant. The way they ran with an air gap is what caused water in your wall.

The plumbing to your right with the 2 inch pipe going up did some idiot tie a second floor drain into that? That would not be code compliant because a common vent is 2 fixtures on the same floor.

Last edited by Ghostmaker; 01-29-2016 at 06:16 PM.
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Old 01-29-2016, 07:22 PM   #14
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I have no idea. This is what I found when I exposed it. Could one be a vent? There is only one bathroom above it unless both sinks come down independently. I would be it is for both sinks above...god I hope those are vented correctly.
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Old 01-29-2016, 10:22 PM   #15
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Ok so the drip drain isn't from the HVAC, it is the Water Softener drain.
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