Modular Terrace Kit MTK2 Grimy Brick Chimney One Pot
A single pot chimney in the same brick. Although it's the same nominal height as the 4 and 8 pot versions, I've dropped it down closer to the level need for the outhouses. (In the screenshot I've dropped it down further to -50)
The screenshot shows a section of completed unit with the components lined up behind. CH1P is the first chimney from the left.