Keep in mid that it's around 20 years old and mostly on my corn and pellet mix. 2 sections will need replacement after this year and a new top cap as well. Everything is 4" from the cleanout tee upwards and none are interlocked and if you can see any smoke leakage, more power to you as it's never leaked.
I made my own custom standoff's in the shop. I find the commercially made ones a bit to wimpy for my taste. Quite a long vertical run but I had to get the exit end high enough to be 'out in the breeze' so to speak.
I replaced the 3-4 last year, it was getting pretty bad. You can see my fresh air intake as well FAK or OAK or whatever you prefer to call it. I like the USSC intake as it comes screened from the factory and has an inside plate as well plus the kit comes with expandable foil hose too.
I made my own custom standoff's in the shop. I find the commercially made ones a bit to wimpy for my taste. Quite a long vertical run but I had to get the exit end high enough to be 'out in the breeze' so to speak.
I replaced the 3-4 last year, it was getting pretty bad. You can see my fresh air intake as well FAK or OAK or whatever you prefer to call it. I like the USSC intake as it comes screened from the factory and has an inside plate as well plus the kit comes with expandable foil hose too.