I am on my 6th year with the system. When I thought I needed to replace my entire drain field and estimates ranged from $6000 to $15000 I had to try your product. Now 6 years later I have not had to drain my septic except for the first month after I installed it. I was doing it every two months and it was getting closer to every month. At $350 per month to drain at 72 months, I have saved over $24000 and it still just humming along in my yard. What an excellent product.