i think you can totally vent into the sewers, but you should be sure that your vented air cannot be tracked back to your house.

For instance, you would need to be far enough away from a 'service tunnel' so that your sewer line meets your neighbors before it can be accessed. If they could walk though the tunnel and look at individual house lines, they would probably smell your sewage & your buds. If it is the entire neighborhood, they could not check every house.
ShroomDr Reviewed by ShroomDr on . Venting into sewer line... I've been searching the forums for some info on whether anybody has ever Tee'd directly into a main sewer line before. I live in a rural area and have my own septic system. I know gas's rise but after they've travelled through those shit lines and up through the holding tanks, would that not change the smell considerably? Or would it JUST be changing where the odor come's out, as by the septic field? I read one thread whereby the fellow was going to vent up through his bathroom vent on the Rating: 5