QUICK ANSWER

Parawewa's bio septic system does not require gully bowser emptying or mechanical servicing under normal residential use, but homeowners should avoid flushing non-biodegradable items, harsh chemical drain cleaners, and excess grease, and should schedule a visual inspection after unusually heavy monsoon flooding. These simple habits protect performance for the full 10-Year written warranty period.

"Maintenance-free" doesn't mean "ignore it completely" — it means the demanding, recurring maintenance of a traditional pit (gully bowser bookings, mechanical servicing) isn't required. A handful of simple household habits go a long way toward protecting the system's biological balance over the long term.

Do:

  • Use standard household detergents and cleaning products in normal quantities — the bacterial culture inside the tank tolerates typical domestic use.
  • Spread laundry loads throughout the week rather than concentrating very high water volume into a single day, particularly for larger households.
  • Schedule a visual inspection after unusually heavy or prolonged monsoon flooding, as covered in our monsoon impact guide.
  • Keep the inspection access point clear and unobstructed by landscaping or parked vehicles.

Don't:

  • Flush non-biodegradable items: Wet wipes, sanitary products, cigarette butts, and similar solids don't break down and can accumulate in the chamber.
  • Pour large quantities of cooking oil or grease down the drain: Grease can coat and slow the biological filter media over time.
  • Use excessive harsh chemical drain cleaners: Occasional normal use is fine, but heavy chemical dosing can disrupt the bacterial culture the system relies on.
  • Drive heavy vehicles directly over the tank or access chamber: Unless the installation was specifically engineered for vehicle loading, keep heavy loads off the tank footprint.

Following this simple checklist is generally all that's needed — there's no scheduled servicing plan to book, no annual contract to renew, and no gully bowser call to make under normal residential conditions.