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  #1  
Old 9/2/18, 1:29 PM
Bill OCallaghan Bill OCallaghan is offline
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Default What's this short PVC stack near floor drain?

What's this short PVC stack near floor drain?-2018-09-01-11-53-23-jpg

What's this short PVC stack near floor drain?-2018-09-01-11-53-31-jpg

What's this short PVC stack near floor drain?-2018-09-01-11-53-39-jpg

It's a small commercial building.
Drain is located near the water heater & furnace.
Furnace has it's own floor drain.

Thanks' Bill O
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  #2  
Old 9/2/18, 1:45 PM
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Default Re: What's this short PVC stack near floor drain?

Based on the location I would say it was designed as the "air gap" for the water heater TPR valve.




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  #3  
Old 9/2/18, 3:59 PM
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Default Re: What's this short PVC stack near floor drain?

Yep. Looks like an indirect receptor for something. If it has a trap it and is connected to the sewer, it needs a trap seal.



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  #4  
Old 9/2/18, 4:37 PM
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Default Re: What's this short PVC stack near floor drain?

It is drain for a sink that cleans dishes and food preparation. It's code down here.
It is an open drain because if a closed drain where to clog it would contaminate the food and dishes..This will not happen with an open drain. It would just over flow on the floor.
Here is an example.





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Last edited by rlewis5; 9/2/18 at 4:47 PM..
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  #5  
Old 9/2/18, 8:17 PM
Bill OCallaghan Bill OCallaghan is offline
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Default Re: What's this short PVC stack near floor drain?

OK. Somewhere I've seen one of these in a modern basement filled with condensate drains. That explains the enlarged sink-like receptor.
In this case, the furnaces drained elsewhere and the water heater is electric. No water softener or HRV installed, etc
Thanks' for the input!
Bill O
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Old 9/2/18, 9:30 PM
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Default Re: What's this short PVC stack near floor drain?

Quote:
water heater is electric
So? please explain



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  #7  
Old 9/2/18, 9:52 PM
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Default Re: What's this short PVC stack near floor drain?

Quote:
Originally Posted by mlarson View Post
So? please explain
He's thinking "no products of combustion"??



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