There have been many types of septic tanks on the market over the years going from partition tanks to the single chamber then multi-chamber round and now the multichamber oblong.
It is important you know what sort of tank you have so that when your tanks needs cleaning you can either have the lids dug off or be able to tell your cleaner what type of tank it is so they know where to dig otherwise it could end up costing more.
As recommended by Councils and Empting Operators, you should service you tank at least every 3 years. If you do not empty your tank regularly, you run the risk of blocking your water disposal system. Just remember every litre of water you use in your house, whether it be toilet, shower, bath, laundry, or kitchen use, it all goes into your septic and must go back into the ground some way. The average house uses approximately 3000litres every 4 days, this is a lot of water to get rid of.
WATER DISPOSAL SYSTEMS
Boulder Holes: Older houses mostly had boulder holes which was just a deep hole filled with rocks. These are not favourable today because of water getting into underground aquifers.
A trench dug down approximately .5 to 1 metre filled with clean metals then pipe then more metal. This method is still favoured by councils today.
Used in wet areas, basically a field tile put in about surrounding ground level.
TANKS WITH WATER TREATMENT
These come in all shapes and sizes but are basically a normal tank that collects the solids and then the water goes on to be treated through aeration and sometimes chemicals so water can be reused for plant irrigation. This is the same no matter what shape of type of tank you have. There are products on the market that claim to reduce cost by extending the time between emptying. This may be so but in most cases in my experience, it costs more for the product in the long run than emptying your sceptic on a regular basis.