You can keep your septic tank in good working order by avoiding putting certain products into the system. Many products fill the tank with solid material, which will decrease the efficiency of your septic system and many become solid in the system, or on its way into the system, and can block the passageway.
Be sure all members of the family know what not to flush or put down drains:
Large Food Particles
Non-biodegradable Toilet Paper
Powdered Laundry Detergents
Arts and Crafts Remnants (i.e. Glue)
Paints or Paint Thinner