2. Cleanout Plug A cleanout plug is the device that controls the flow of wastewater and sends it down the sewage pipe. If it is broken or missing, sewer gasses will flow back into your basement. SOLUTION: Remove the drain grate and inspect the cleanout plug to see if it is in good...
We can both understand the reasons for thinking an outdoor septic vent using charcoal might freeze (moisture) and then stop working- but I suspect the requirement to remove the vent in cold weather is product dependent. Let's ID the specific brand and product that you're using there in ...