There can be many attractive advantages to selling your city or suburban home and relocating to a house out in the country -- clean air, low crime, the endless wonders of Australia's unique wildlife. Unfortunately, moving to a rural area can also mean forgoing some of the conveiniences found in more urbanised areas, and many homes in more isolated areas rely on septic tanks and other off-grid sewage disposal systems, in lieu of linkages to full-blown sewer systems, to dispose of their sewage and waste.