Mocoondo wrote:
1. The septic process works because of anaerobic bacteria, which is bacteria that thrives in the absence of oxygen. If you tee into a drain line that opens to the surface, you are admitting air into the system and will kill off a lot of your "good" bacteria.
You could add a p-trap to prevent this and to prevent the smell when you open the home dump station. Use a 45 deg bend down, 90 deg back up and 45 deg to horizontal again in the horizontal part of the system and you're good to go. That's what I did anyway and it works perfectly.
You also want to make this higher than the septic pipe tie in, so no house stuff runs into this p-trap.
You'll get something like this.
----------v-----------\________
----- is rv pipe and _____ is house pipe
The p-trap is being cleaned by the grey water.
Edit FYI: we don't have a septic tank. Our house black and grey water go straight into the city sewer because water sanitizing stations prefer it that way.