[RussWhite]

Tom and Chester,

Thanks for reading the thread and helping with my thoughts and ideas. I actually have a good view up through the ( I'm calling it a chimney ) all the way to the top and can see the sky. The issue is how would one remove the exhaust pipes that have a welded 90 on the bottom that will not pull up through the chimney.
Newell has not responded to my email inquiries.

For now I am concentrated on the other end where the black pipe and union are located. I need to get all that replaced and it is rusted together very well. I have been getting help from Roger who suggests I put a long bar into what is left of the exhaust fittings and try to turn it out from the bottom of the boiler. He says the boiler fitting is very well welded and strong. He advises not to jerk as that would risk shearing the bolts that hold the boiler to the bottom of the enclosure.
He included a figure from the AquaHot installation manual which shows the maximum length of the exhuast pipe and number of bends. It appears Newell exceeded those recommendations. He stated he had never seen an installation with a union. I think the union is there to allow the pipe to fit between two fixed end locations. You would not need it if the pipe just ended under the coach like the installation manual shows.
I still have the fiber-optic camera on my wish list, but I don't think it will assist in this project. Thanks guys!