Flies
We're having a problem with flies i.e. fruit and sewer flies. Can't seem to get rid of them in our travel trailer. We've flushed and cleaned out the grey water pipes/holding tanks and all other drains...
Forum Discussion
bertnspike wrote:
SNIP
Then I hooked everything back up, starting with the sewer donut. I used my sewer hose support only on for the last 4 feet of hose, forcing a droop in the hose, which will have the same effect as a p-trap under a sink, in that it will stay filled with water, preventing any flies from coming up.
If you Google "sewer gnats" you'll learn all the juicy facts.
You did a lot of stuff that ought to work but the water in the sewer line won't help. The larvae came up through the water in my shower trap and then turned into flies. As flies they may also be able to get into the tanks via the roof vent.
