Be prepared that often visible plumbing problems are only the tip of the problem with plumbing systems, especially if you are living in an older house or apartment. While most plumbing problems can be fixed, occasionally replacement of the main lines may be required to bring your house or residence back up to code and to prevent further problems.
Septic systems need regular maintenance and also will need to be pumped if the enzyme level is low in the holding tank and the solid materials are not breaking down. Any signs of water in the grass or soil over the tank or around the tank may be a sign that the tank is not draining properly and is backing up.
