The frequency of pumping depends on a few factors.
Septic tank drainage problems.
The grey water is allowed to pass through the tank and out into the underground drain field lines in your yard.
A septic tank soakaway is a drainfield of perforated pies laid in paralell trenches on 300mm of washed drainage stone.
Structural damage leading to leakage.
But aside from these non organic materials finding their way into your tank there are other causes of common septic system issues.
However if drain field pipes become clogged this issue could back up the rest of the system.
The most common cause of septic system problems and failure is their septic system absorption component more commonly known as a drainfield becoming.
Problems with flushing or slow drainage could mean that there is a block in one of the pipes.
These soakaways are for roof water only and are illegal for sewage effluent.
Water backup in toilets and drains is not normal.
These issues usually signal a clogged drain or full septic tank.
Septic tanks gradually fill with solid waste.
This however is not true.
Blockages causing flooding within the system including roots blocking pipes.
Once the tank is full of solid waste you may experience sewage backups in the toilets or slow drains in tubs and sinks.
Most common septic tank drainage problems and failures are due to the drainage field and not to the septic tank itself.
There is one thing certain about a septic tank drainage field it will at some stage fail.
Septic tank problems and septic tank solutions.