I used to have to empty my septic tank every 4 months. After putting in this system I just had it pumped after 2 years (because I was afraid it would be bad). The guy that pumped it said it could have went another year or 2. Just on saving from pumping cost of 180 per the system has paid for itself 2 times over in 2 years. Unbelievable! Also my drain field is no longer wet or even damp! If you have a septic system get this and save even on a working septic tank. Can not thank you enough for this invention.