But we never:
- had or used a garbage disposal in conjunction with a septic system
- flushed things you shouldn't flush (condoms, sanitary napkins, etc.)
- poured industrial-strength cleansers or other toxic waste down the drain.
In 17 years of experience with two septic systems, we had to have one of them pumped, once...
So far, one pair of toddler briefs have gone down (he's 3 and was potty training...), and one feminine product (Mrs. A forgot one time). They haven't broken the pump yet. We also didn't have a strainer on the kitchen sink drains for quite a while, but that has been remedied.