Originally Posted By: jpeck
This post was automatically imported from our archived forum.
The IRC is not specific about this.
"Condensate from all cooling coils or evaporators shall be conveyed from the drain pan outlet to an approved place of disposal."
But what is "an approved place of disposal."?
I would recommend a sanitary sewer connection in the case of the photo, through an indirect waste air gap and a trap. This is because that is an option specified in the Standard Mechanical Code, which more clearly states what can be done.
M1411.3 Condensate disposal. Condensate from all cooling coils or evaporators shall be conveyed from the drain pan outlet to an approved place of disposal. Condensate shall not discharge into a street, alley or other areas so as to cause a nuisance.
1997 Standard Mechanical Code
M304.8.3 CONDENSATE DISPOSAL PLACE. Condensate from all cooling coils or evaporators shall be piped from the drip pan outlet to a suitable disposal place where it will not cause a nuisance as follows:
1. Units larger than 3 tons (10.6 kW) nominal capacity shall drain to a sanitary sewer drain through an indirect waste, storm sewer drain or an approved French drain.
2. Units 3 tons (10.6 kW) and smaller capacity may terminate in gutter or roof drain, on a concrete pad or other location subject to approval of the mechanical official.
3. Condensate drains from rooftop units may spill on rooftop providing the condensate does not drain into a street or alley, or other areas of sufficient amount to be a menace.
I forgot to add, it would also need a sanitary tee at the vent, not just drilled into it .