Here in PA (atleast my county) it's required to be pumped every 3 years. My house has a 1000 gallon tank with regular style leach field. I'll probably do it every 2 years as even though it's only two of us we are heavy "users" and refuse to go the 1 ply toilet paper route. We do use septic safe paper and if wipes are needed they go in the trash can. I also only do one load of laundry per day if multiple loads are required. No excess grease down the drain and I try an paper towel down pans before hand. I typically use the dish washer (light wash cycle most times) as they use less water than hand washing. Ridex, or the like, once a month.
I have a really nice access port to the tank in my yard (makes me believe it was recently redone), but at this point really don't want to open it up and look down there
I have a really nice access port to the tank in my yard (makes me believe it was recently redone), but at this point really don't want to open it up and look down there