At a recent home inspection in Baltimore County I found this odd plumbing fix. See here how the condensation line drains to the toilet tank! Ingenious but wrong! The fix for this is really simple because there is a sump
How does a sink trap work?
The sink trap retains a small amount of water after the fixture is used. This water in the trap creates a seal that prevents sewer gas from passing from the drain pipes back into the occupied space of the home