https://ozseptic.com/Independent guide to septic tanks, AWTS and on-site wastewater in Australia: council rules, real prices and maintenance. We don't sell tanks.en-AU https://ozseptic.com/worm-farm-system/https://ozseptic.com/worm-farm-system/Thu, 09 Jul 2026 12:00:00 GMTVermifiltration explained, the four systems on the NSW Health wet composting register, real effluent results, and why one accreditation certificate mandates quarterly servicing the marketing says you don't need. https://ozseptic.com/septic-tank-replacement-cost/https://ozseptic.com/septic-tank-replacement-cost/Thu, 09 Jul 2026 12:00:00 GMTLifespan by material, why concrete tanks rot from the crown down and not the floor up, the RMIT finding about pre-1980 Victorian tanks, decommissioning costs, and the renovation that forces a $24,000 upgrade. https://ozseptic.com/what-size-septic-tank/https://ozseptic.com/what-size-septic-tank/Thu, 09 Jul 2026 12:00:00 GMTAS/NZS 1547 design flows, the bedrooms-plus-one rule, the capacity formula S + (DF × N), state minimums, and the sludge allowance that quietly sets your pump-out interval. https://ozseptic.com/septic-tank-smell/https://ozseptic.com/septic-tank-smell/Thu, 09 Jul 2026 12:00:00 GMTRotten egg outside before rain, sewer gas in the bathroom, or a stink over the trench — three different faults with three different fixes. What the plumbing code requires, and when odour becomes a council matter. https://ozseptic.com/septic-tank-pump-out/https://ozseptic.com/septic-tank-pump-out/Thu, 09 Jul 2026 12:00:00 GMTWhat a septic pump-out really costs in Australia, how often your state requires one, who is legally allowed to do it and what the service report must say. Independent — we don't pump tanks. https://ozseptic.com/septic-tank-problems/https://ozseptic.com/septic-tank-problems/Thu, 09 Jul 2026 12:00:00 GMTSlow drains, gurgling, backup, ponding, lush grass, odour — the causes ranked by what they cost to fix. Plus what heavy rain really does, the tank that floats if you pump it, and the roots you cannot cut out. https://ozseptic.com/septic-tank-installation/https://ozseptic.com/septic-tank-installation/Thu, 09 Jul 2026 12:00:00 GMTWhat each stage produces and who signs it, who may lawfully install, the pre-backfill hold point, approval timeframes by state, and the installation mistakes that fail a system before it runs. https://ozseptic.com/septic-safe-products/https://ozseptic.com/septic-safe-products/Thu, 09 Jul 2026 12:00:00 GMTToilet paper, laundry detergent, bleach and additives. What Australian councils actually require, what independent testing found about sodium, and which claims exist only on marketing pages. https://ozseptic.com/grease-trap-cleaning/https://ozseptic.com/grease-trap-cleaning/Thu, 09 Jul 2026 12:00:00 GMTWhat grease trap cleaning costs by trap size, how often your water authority actually requires it, how the trap is sized, and what non-compliance really costs. Independent — we don't clean traps. https://ozseptic.com/composting-toilet/https://ozseptic.com/composting-toilet/Thu, 09 Jul 2026 12:00:00 GMTThe composting toilets everyone reviews on YouTube are not on the NSW accredited register. What that means for a house versus a caravan, real 2026 prices, emptying intervals and the greywater rule nobody mentions. https://ozseptic.com/council-approval-septic-system/https://ozseptic.com/council-approval-septic-system/Thu, 09 Jul 2026 12:00:00 GMTSection 68 explained, approval to install versus approval to operate, published council fees, renewal by risk band, penalties — and why the buyer of your house must apply for a new approval within two months. https://ozseptic.com/awts-aerated-wastewater-treatment/https://ozseptic.com/awts-aerated-wastewater-treatment/Thu, 09 Jul 2026 12:00:00 GMTAn AWTS is an appliance with a mandatory service contract, not a tank. Real install prices, the quarterly servicing law, measured electricity use, the desludging interval councils actually state, and what happens when the blower dies. https://ozseptic.com/absorption-trench/https://ozseptic.com/absorption-trench/Thu, 09 Jul 2026 12:00:00 GMTAS/NZS 1547 construction detail in millimetres, the full design loading rate table by soil category, setbacks from bores, dams and boundaries, and the 100% reserve area councils require. https://ozseptic.com/septic-tank-cost/https://ozseptic.com/septic-tank-cost/Mon, 06 Jul 2026 12:00:00 GMTTank prices by material and size, the full install broken into line items, state-by-state ranges, septic vs AWTS vs sand filter over ten years, and the fees councils actually publish. Independent — we sell nothing. https://ozseptic.com/how-a-septic-tank-works/https://ozseptic.com/how-a-septic-tank-works/Sun, 05 Jul 2026 12:00:00 GMTThe tank removes only 25–35% of the organic load. What the three layers do, what the baffle and outlet filter are for, how the trench and its biomat treat the rest, and how AS/NZS 1547 sets the trench length.