A well-designed septic tank and leach field will be completely maintenance free if you are careful about what goes into it. We limit the amount of cleaning products that go into the system. The happier the enzymes down there are, the better. I use white vinegar for all my cleaning, and I use as little dish detergent as I can. We had them pump the septic tank contingent to our purchase 20 years ago. We haven't had a single problem since then.
Baltimore Sewer Service