Where to place Tankless Water Heater Condensation Line

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Mike McKinzie

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I am planning on installing a tankless water heater in my attic. Where would you recommend that I run the condensation line and how much water will be coming through it. The drain for the A/C unit is right next to where I will install the water heater and it empties into a pipe which I believe leads to the sewer.
IMG_20170321_144150045.jpg IMG_20170321_144219366.jpg
I seem to have two options. I can run pvc across the attic and outside or I can tie into the A/C drain. What would you recommend?
 
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ColeMaude

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I have placed inside store room. I have another option to place outside the wall.
 

Stuff

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I would drain to the existing pipe but verify where it is going, properly trapped, etc. Some locales don't want untreated condensate going into the sewer so check with your permit office.

Also, condensate line from a/c coil does not seem to have a trap so cold air is being pushed into the drain. Someone insulated the pipe instead most likely because it was sweating. Get that fixed and check for an overflow switch/sensor.
 

Sylvan

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I would check the Galvanized Tee on your gas line as normal plumber /gas fitters do not use galvanized unless it is subject to moisture and if this was the case why would they mix black steel and galvanized?
 

Dana

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Natural gas condensate is mildly acidic, and plastic is the right material for condensate drains, even if it's buffered with a neutralizer cartridge. (Who is going to check and maintain the neutralizer if it's an a 130F attic?)
 
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