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

Airtight drains that still allow water to flow

qofmiwok | Posted in General Questions on

I’m trying to build a super tight and dry house.  I have 4 drains in my basement going to a sealed sump pump.  Unfortunately my builder didn’t follow the plans and also connected the garage drain to the sump. So now I have a big air leakage path as well as chemicals & fumes from the garage flowing through the sump which could then come up through the floor drains. 

Is there an airtight check-valve that would keep air from coming up those drains, but open when water pressure is detected to allow it to flow out?   

I found this waterless trap seal, seems like it might work?


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


    Just to confirm - there are no traps?

  2. qofmiwok | | #2


    1. Expert Member

Log in or create an account to post an answer.


Recent Questions and Replies

  • |
  • |
  • |
  • |