jrn8265 wrote:I have a koker and I shut her down and do a full cleaning (including all pipes and flue) every 6 weeks or my draft starts to fall.
If you replace your 90 degree elbows with T's you can clean the pipes at will without shutting down. I can't amagine a vertical flue would need to be cleaned much. The flyash falls to the bottom.
This pic doesn't show it but there is also a T at the bottom where the pipe comes out of the boiler. You can clean out all the flyash in a couple minutes without ever shutting down.