GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter Instagram YouTube Icon Navigation Search Icon Main Search Icon Video Play Icon Plus Icon Minus Icon Picture icon Hamburger Icon Close Icon Sorted

Community and Q&A


Dickfry | Posted in Building Code Questions on

I have a high-efficiency  tankless hot water heater. new construction all plastic pipe,can I run the condensation drain into the sewer line which goes out to a concrete septic tank?

GBA Prime

Join the leading community of building science experts

Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports from the field.


  1. Expert Member
    Akos | | #1

    Yes, but you should put a neutralizer on it. The condensate is acidic and you might not want to dump into your septic tank.

    I like the ones with little pouches in it, you can refill them limestone shavings from the garden center.

Log in or create an account to post an answer.


Recent Questions and Replies

  • |
  • |
  • |
  • |