I got to work on the septic yesterday, added T,s to both the inlet and outlet. I did not see the post about not adding a T to the inlet until this morning. My research on the internet and my septic guy said I should have one, he said it helps ensure the solids go to the bottom. Internet research also said the same.
The inlet side had PVC pipe coming in so adding a T to that side was no problem. The outlet on the other hand was the old clay tile, what was sticking out of in the septic was pretty beat up. I had to did out the pipe and cut it off and add a fernco fitting to connect the pipes. The outlet was also at the same level as the inlet, the pipe had settled behind the tank. I had to break out some of the tank so the pipes would connect.
The T on the inlet side I went 12" down, and the outlet side I made the pipe 14" down. The pipe on the outlet side is now about two to three inches lower than the inlet.
I have attached a picture of the T and septic, WARNING, this is a picture of an open septic and may not be suitable for sensitive members.
I will now have to get the septic guy back out to pump it again. Thankfully I do not have to pay what some of you are paying, they must treat the stuff like toxic waste in your area to justify such prices. This time I will take the day off from work to remove the covers so he can get a good job done. It will be in a week or two as I am being sent out of town for work.