Thank you to all who have replied with their tips and suggestions, it is much appreciated.
Thankfully this cracked pipe is not in the kitchen slide. Our 2003 Dynasty Chancellor model has only 2 slides, both on driver's side with the kitchen slide being the shorter depth 18 inch one. This cracked pipe is directly above the wet bay (where the kitchen pipe exits the shower floor then the pipe travels directly into the gray tank) therefore no slide movement to cause this break. This broken pipe is stationary (but obviously has some stress from something). Thank you for researching my unit for that common kitchen slide pipe break issue.
I still haven't decided how I'm going to repair this pipe. We are using the bathroom sinks to dispose kitchen water, that buys me some time to decide on the best, less intrusive repair. Once I get it fixed, I'll post how I did it. I have tools and I have repaired many things on this coach (full-timing in it since 2012). I have used the JB Weld product for several successful repairs which is why that solution was my first thought. However being concerned that the repair might not last due to any pipe stress, it leads me to consider a more permanent fix. We'll see.
Thank you again to all who have responded with your ideas and thank you to other Monaco owners who may have a suggestion or tip for repair. Also, thanks for the "good luck" wishes. I'll need all I can get on this one.
RonCindy, 2003 Dynasty Chancellor