I am looking for a way to connect a condensate drain line (pump from HPWH and HP) to this sewer part:

enter image description here

The bottom part seems to be cast iron, the top part PVC. I do not know how they are connected.

If my understanding is right I may also need a p-trap. But there is not too much room. Is there a compact p-trap or a Y with p-trap ?

Since I do not have much experience yet with sewer line I’d appreciate if the answer is as detailed as possible (e.g., parts needed, how to disassemble the current line, how to put mate the new parts.

PS: The pipe that goes up is just the drain for the washer.

  • 1
    You're sure that's PVC and not ABS?
    – Huesmann
    Oct 30, 2023 at 12:49
  • Your local area may or may not want condensate in the sewer at all. In areas with limited water they usually do, in areas with treatment capacity issues they don't like having clean water added to the waste stream to be processed.
    – Ecnerwal
    Oct 30, 2023 at 13:05
  • @Huesmann I am not, I just assumed PVC but yes, ABS looks more correct.
    – divB
    Oct 30, 2023 at 18:31
  • @Ecnerwal Good point. I just looked up ordinance and it states "Air conditioning condensate may be discharged to the sanitary sewer or to permeable earth", so yes, it's allowed.
    – divB
    Oct 30, 2023 at 18:32


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