No sewer connection means every drain runs to a tank. Solids build up, so it needs emptying every few years. Put it off and solids clog the trench: drains back up and the yard smells. Council also wants the system kept in order. We pump out, inspect, repair and upgrade septic on Central Coast rural blocks. Tell us what the drains are doing and where the block is.
Get a Quote →Older rural and semi-rural properties across the Central Coast - particularly around Somersby, Kulnura, Mangrove Mountain, Jilliby, Yarramalong, Dooralong, Peats Ridge and Calga - often run a traditional septic tank rather than a newer AWTS. These systems rely on solids settling in the tank and liquid effluent dispersing through an absorption trench. The tank needs desludging as solids build up, generally every 3-5 years depending on household size, and the conditions on your Council approval to operate still apply.
A pump-out removes accumulated sludge and scum before it overflows into the absorption trench and clogs it - which is the single biggest cause of septic system failure and the most expensive to fix. Inspections check tank condition, baffle wear, and whether the absorption trench is still dispersing effluent properly.
Removal of accumulated sludge from the septic tank, generally needed every 3-5 years depending on household size and tank capacity. Cost depends on tank size and how easily the pump truck can access it.
Tank condition, baffle and absorption trench checks, useful before buying a property or when you notice slow drains or odour. Cost depends on the size of the system and how much of the trench needs assessing.
Baffle replacement, lid and riser repairs, and absorption trench remediation when a system is underperforming but not yet at end of life. Priced by what has failed and how much trench work is involved.
Full upgrade from a traditional septic system to an Aerated Wastewater Treatment System, often required when a septic system reaches end of life or a block's absorption capacity is no longer sufficient. Cost depends on system size, site access and how much irrigation field work is involved.
Central Coast Council's on-site sewage page lists the systems used where there is no sewer, including septic tanks draining to absorption trenches or evapotranspiration beds, and septic tanks emptied by pump-out. Every system must be registered with Council and hold an approval to operate, and an old tank being replaced must be decommissioned under NSW Health Advisory Note 3.
A pump-out system, where a tanker empties the tank instead of it draining to a trench, is no easy way out here. Central Coast DCP 2022 (Chapter 3.3) does not allow new homes on vacant land, or subdivisions, to rely on one. It is only approved where an existing building's system is failing and there is not enough room for a replacement, or no other workable option. For development on flood-prone land, the same chapter requires the treatment tank to sit above the 1% AEP flood contour and the land application area above the 5% AEP contour. In defined drinking water catchments, systems are not to sit on land below the 1% AEP contour.
Rain matters too. Bureau of Meteorology averages for Gosford AWS, which only has records from 2013, show March as the wettest month at 214.9 mm and September the driest at 63.0 mm. Wet ground takes effluent more slowly, so a trench that copes in September can struggle after a wet March. When you enquire, say when the problem started and whether it follows rain.
Send an enquiry if your property is on septic in Calga, Somersby, Peats Ridge, Kulnura, Mangrove Mountain, Jilliby, Dooralong or Yarramalong, or anywhere else on the Central Coast without a sewer connection.
Tell us what you need and where the property is.