One reason why you need a professional septic system professional to maintain your sewage system is because they understand the system better than anyone else. They have been keeping these systems in business for years, know where they are weak and where they need to make adjustments so your system works at its peak efficiency. Also, they have seen many problems that you may experience with your septic system and can give you the best advice on how to fix them. If you have a problem that needs to be addressed, it is much better to let the professionals handle it rather than doing it yourself.