I have a septic system and lift station with an open vent pipe about 3 feet off the ground. As can be expected, I often get a smell from this vent if I'm in my back yard. I've been looking at different filters that can be installed over the vent pipe to control the odor. I was wondering if these filters really work and if so which type works the best? Or, is there a better way to control the odor?















