[chrismorse]

The most trouble free system is a gravity system, that is “stuff” flows continuously down hill from house to tank and finally down to the leach field.
If your house, and or tank are below the leach field, (or sewer), the effluent must be pumped UPHILL for disposal. This means you are dependent on electricity to move it, so I consider a generator a must have for our more frequent outages.

I’ve done two major remodels, developing living space, (kitchen and bath/laundry), below the main floor of the house. Both required upsizing of the pump tank and moving the pump/tank to well below the shower/toilet elevation, to ensure that if the power goes out, the downstairs unit will not flood.

+1 on Neil’s recommendation for risers with lids for all septic tanks.

Chris