Australia
The absorption trench: how it's built, how long it must be, and the reserve area nobody mentions AS/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. → AWTS explained: what an aerated system costs to buy, run and keep legal (Australia 2026) An 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. → Council approval for a septic system: the two approvals, the fees, and the one that doesn't transfer when you sell Section 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. → Composting toilets in Australia: what's accredited, what it costs, what it's like (2026) The 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. → Grease trap cleaning: cost, frequency and trade waste rules (Australia 2026) What 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. → How a septic tank actually works — and why the soil does most of the job (Australia) The 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. → Septic safe products: what the evidence says, and what the label doesn't (Australia) Toilet 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. → What a septic system really costs in Australia (2026): every line of the quote Tank 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. → Installing a septic system in Australia: the eight steps, the two inspections, the paperwork What 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. → Septic tank problems: a diagnostic order, cheapest fix first (Australia) Slow 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. → Septic tank pump out: cost, frequency and the rules (Australia 2026) What 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. → Septic tank smell: what the location of the odour tells you (Australia) Rotten 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. → What size septic tank do I need? The formula, the minimums, and why bedrooms decide it AS/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. → When to replace a septic tank — and what it costs (Australia 2026) Lifespan 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. → Worm farm wastewater systems in Australia: what's accredited, what they cost, and the servicing claim that isn't true Vermifiltration 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. →
Local council · state EPA — Every install or replacement needs council approval, and AS/NZS 1547:2012 governs design. Pump-outs every 3–5 years are standard council practice — budget for them.