If you hold a septic reservoir, does the hose from your sink and shower travel within too?
Answers: Yes absolutely. Every drain contained by your house goes directly to your septic reservoir. The function of a septic tank is to contain single the sut, crap, toilet paper, and natural garbage that you drain. It sends the hose on into a drywell which disperses the water spinal column into earth.
And the wash machine, too. Unless you tube it somewhere else, like into the courtyard.