Septic Tank Tips Tips For A Healthy Efficient Septic SystemHave your septic pumped out regularlyAllow as little grease or fat into the systemDo not dispose of non-biodegradable materials into your septic. (eg. plastic, nappy liners or sanitary products)Do not dispose of old medicines or large amounts of disinfectant into your septicKeep trees and shrubs with large root systems well clear of your septic and dispersment lines