I’m not OP, but when I did this, it was so allow me to run a pipe cleaning tool in each direction to clear blockages.

Thank you but it sure is not exciting

I was going to say, this is God tier DIY. I paid a plumber like $2k to install one for me.

permission was granted by the surrounding soil, neither did it intervene, nor did it stand its “ground” ;-)

Depends on the state and jurisdiction.

I was a health dept inspector that focused on septic systems and a homeowner installing or repairing a cleanout would not be something we would require a permit. It would be considered a minor repair or plumbing work on the building sewer unrelated to the functionality of the disposal system–just needs to be watertight.

And the regulations in my state are some of the nations most stringent on this kind of stuff.

Exactly. Well kinda because it’s still shitty work even with the clean out.

This tee fitting is designed to be snaked both ways

A wye fitting is designed to be snaked one direction

For example, you’d use a wye fitting after a gutter. If you’re going to snake it, it will not be in the direction of the gutter. You’re not sending the snake up the gutter. The wye would allow you to snake the portion of pipe you need easier.**

If this was in the middle of a long sewer pipe with no other clean outs near by. Then the tee is probably the better choice.

Its cast iron. And I assume its somewhere warm and dry if its that close to the surface.