Got the new Jotul 600 up and running!

Nice stove, and nice place!
Two questions:
Why did you go with a "t" instead of an elbow? I would think an elbow would make for easier cleaning? Getting to that T looks like it ain't going to be fun.
What is the piping running outside the house for? If it is for wood burning appliance, it doesn't look braced very well or plumb, and also does not look like it meets the 10/2/3 rule?
Not knocking, just curious, and thinking about stability & safety.

I went with a T- connector instead of an elbow because the T - connector allows any creosote that happens to fall down the liner to build up in the two inches below the T in the removable cap. I previously had a stove connected with a 90 elbow out the back of the stove and when some creosote flaked off the pipe and landed in the elbow between cleanings I ended up with a chimney fire when that pile of creosote ignited one day.

The pipe outside the house is a vent pipe for my propane hot water heater. It seems to pull a good draft and I've never had any problems with fumes in the garage. It was installed before I bought the house and the previous owner ran it like that for ten years, as well. I recently had the hot water tank replaced and the licensed plumber didn't say anything to me about it being a problem.

Nick..wow. Do you feel like you just discovered you had a case of old vintage nitro glycerin in the trunk of your car that had worn out shocks?

Do you mean, did I feel like I got lucky that my house didn't burn down from a creosote fuelled chimney fire ? If so , then the answer is ,yes !