Good afternoon, I have a 6y.o. icc excel chimney pipe that is an "out and up" setup for wood stove. My installer cleaned the system mid February 2020. Ever since the cleaning, I have noticed a loud clunk "da-dunk" coming from the wall if the stove is heating up from cold. Same thing happens when cooling off/going out. I have attached pictures of the pipe and tee, does this look ok? Thanks for your feedback
![Chimney pictures Chimney pictures](https://www.hearth.com/talk/data/attachments/265/265960-e513dc63905218744a8dfbe817bf12f2.jpg)
![Chimney pictures Chimney pictures](https://www.hearth.com/talk/data/attachments/265/265961-b01350b56990d0b29e41f7138f17ec23.jpg)
![Chimney pictures Chimney pictures](https://www.hearth.com/talk/data/attachments/265/265960-e513dc63905218744a8dfbe817bf12f2.jpg)
![Chimney pictures Chimney pictures](https://www.hearth.com/talk/data/attachments/265/265961-b01350b56990d0b29e41f7138f17ec23.jpg)