Doug Elerath

I have a Separett. No peat or shavings or anything. I have no house plants. Per blower-door test my house is essentially air tight except for Lunos ventilation system and the Separett exhaust fan. I clean all air filters regularly. I get no bugs in my house - no flys, spiders, etc. Yes, essentially air tight. EXCEPT  I get fungus gnats in my toilet, usually mid-late summer. Any idea where they might come from? Spontaneous generation? I poop them out?

İ had this problem as well. My pee-line empties into my septic and has a trap to keep the smells away. The trap plugged up. Cleaned the lines and replaced the trap. I now pee in a bottle (male, so it is easy) and at the end of the day empty it into the pee-hole at the front of the toilet and then follow that with enough water to clear the line. Not the most conservative approach, but my line no longer clogs. A friend had his line go directly out of his house, but bugs crawled into his house through the open line.