


Using a propylene glycol solution instead of water in a trap.Any environmental impact from its discharge is negligible compared to the contents that can be flushed out of a flooded basement. Mineral oil tends to be a better option, as it does not go rancid, where vegetable oil does.

The oil floats on the surface of the water and creates a liquid seal preventing further evaporation. Pouring a small amount of vegetable or mineral oil into the drain to just cover the trap's water surface.Routinely adding water to the floor drain.In infrequently used floor drains where such a primer does not exist, evaporation can be mitigated a few different ways:
