The key to avoiding costly septic system repairs is preventative maintenance. Regularly inspecting and cleaning your septic tank can help you identify potential issues before they become expensive problems. Additionally, be mindful of how much water you use on a daily basis, as too much water can put strain on the system and lead to costly repairs. Furthermore, it's important to avoid flushing items that don't break down easily, such as baby wipes or plastic bags, as these can clog up the system and require repairs. Finally, make sure to contact a qualified professional if any problems do arise so they can be addressed in an timely fashion without breaking the bank.