How do I avoid problems?

For septic tanks: Avoid excessive usage of household detergents or bleaches; these upset the biological balance of the system. Do not overload the system by connecting rain or water drains to septic tanks or cesspools.

For cesspools: check the level in the tank regularly, do not let it overfill. Have it emptied at regular intervals: these will become more frequent if you install a dishwasher for instance.