Every week or so I get calls from customers and potential customers asking about their septic tank and how it works.
I Like to use a 1250 gallon, two compartment septic tank. This will not be the right size for every need, but makes a great example.
It is 109 inches long by 68 wide and approximately 78 inches tall. The inlet hole for the waste water and material is 64 inches’ center of the hole up from the bottom of the tank. A 4-inch drain pipe goes through it with a “T” pipe glued to it on the inside of it. The “T” will have 4 in pipe approximately 18 inches long going vertical down to the middle of the tank. The outlet hole is at the other end of the tank placed 4-inches lower with a 14-inch down-pipe again.