I have a down flow system (ie: a furnace on top of an a-coil) and I noticed that it does not have a p-trap on the condensation line. Given that it is a down flow setup it appears the trap would have to go through the floor into the crawl and back out again. Is there a solution for this issue besides an electric pump?
If I live in an area that is mostly requiring heat is there any water going down this line? I am assuming that there is only water buildup when AC is used.