Well it's been just over a year and since installing the unit I have not had a problem with my septic system. This has saved me a lot of money because I was pumping about every month or so. Had the system pumped and installed the unit and have not had I problem.i would highly recommend this unit. cutomer service is great they answered any questions I had both before I purchased the unit and during instalation. UNIT DOES WHAT THEY SAY