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Old 06-19-2013, 09:11 AM  
bud16415
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It’s hard to envision a condensate line back flowing. But code is code I guess.

If it were mine I would just poke a bigger hole in the cover or take the cover off.



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Old 06-19-2013, 10:17 AM  
nealtw
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I can't see the back flow thing but, drill the hole and put a T in it, leave the top of the T open. Not sure how you get it 2" above when the pipe is always laying on the floor.



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Old 06-19-2013, 11:01 AM  
mudmixer
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If you have a basement or utility area with other appliances (water heaters, wash machines, dehumidifiers, etc. the drain should already have a trap, but needs a slotted open cover to allow surface water in.

You could buy a cheap plastic drain cover and cut a hole large enough to to accept and open "L" turned downward.

Dick

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Old 06-19-2013, 04:30 PM  
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Quote:
2" clearance is typical for an air gap.
So the pipe laying on the floor beside the drain is no good either then. It needs to be raised 2" up off the floor?
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Old 06-19-2013, 05:16 PM  
nealtw
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Quote:
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So the pipe laying on the floor beside the drain is no good either then. It needs to be raised 2" up off the floor?
I am a non beleiver, I would want to know the language in the code, out here we see these things with an elbow down, we also see them connected to the floor drain below the level of the floor and I have seen one hooked to the overflow in the back of a bathtub. This has to do with air venting behind water, so I suspect if the rest of the screen is open to the air, the trap will not syphin empty problem solved. There has to be more to the rule than just a distance above.
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Old 06-19-2013, 09:33 PM  
nealtw
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So after a little digging,
AS I understand it, the AC unit can or will draw air thru this line back to the unit and if the sewer backs up could pull sewer into the unit (I guess everything out here is against code)
So cut the pipe in the vertical drop and add a funnel and leave an air gap for the water to fall 2" into the funnel and elbow the pipe into the drain at the floor.
Then you will be the only person that is to code.

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Old 06-27-2013, 09:31 AM  
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Just add a p-trap to the condensate line where it comes out of the condenser.

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Old 06-27-2013, 09:51 AM  
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Just add a p-trap to the condensate line where it comes out of the condenser.
Care to explain the need for a trap here.
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Old 06-27-2013, 04:12 PM  
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The P-trap with water in the trap prevents pulling the "sewer gas" from the drain when the blower is running. Just stick the pipe into the drain grate.

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Old 06-27-2013, 05:00 PM  
nealtw
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Most of this discussion was around the air gap and I under stand the trap if you were going straight into a sewer pipe but for the same reason that line would have to be vented. Now that I understand the reason for the gap I see no reason for a trap too.
Are you suggesting a trap instead of a gap, you still need a clean air vent or an air gap so water dosn't get sucked into the AC



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