septic tank diagram

A septic tank diagram shows how septic content is processed by means of bacteria breaking it down. Waste water and solids enter in the inlet where they sit and slowly separate into a sandy sludge. I don't know who thought up the idea of making a septic tank, but it really was a great idea considering how efficiently it works.

septic system


septic tank diagram

The intake from the the house main septic line receives waste water and solids in the first chamber. Water flows over the top of this chamber into the second chamber. Solids break down and sink to the bottom. The interesting part is that after the bacteria break down the solids, there is only just a tiny amount left. This turns into the sandy sludge.

Almost everything turns into a liquid and flows out to the drain field. The sandy sludge at the bottom of both chambers will build up over several years. This is why we need to pump septic tanks about every five years or so. Still, when you consider how much gunk the septic tank receives and how long a tank can go without being pumped out, it's pure science at work.

Ok, so it's just kind of a cool system, I don't daydream about septic systems.


Septic tanks are very reasonably priced. The price of the excavation will depend on many factors but compared to the cost of installing a drain field with leeching system as in the old days, modern septic tanks, Infiltrator chambers and excavation are very cheap.

If you can have the septic line from the house to the tank, the tank, and the drain field all excavated at once, you will get a better deal on the excavation costs.

septic-tank-diagram top of page