i was finally able to get the gas stove pipe out of the wall (up and into chimney). what i found was a round terra cotta pipe 8" or so. I also was able to open the cleanout door on the outside of the chimney. when i looked thru the cleanout door i measured and found about a foot or so rise to where the flex pipe is coming thru and up. now putting in the xxv with the pipe coming up top then elbow into the chimney wall. this is where i am not sure if i should go with solid pipe with a "T" so i can use the cleanout that is nice and convenient. hence my question.....how often should i be cleaning the chimney and should i take advantage of the cleanout....thanks.
jim
jim