Well I went back to NAPA to verify it was the correct belt and they said it was, so I got another replacement. The counter guy said it the pulley is not out of alignment then it could be a bad bearing, and said that the belt was distorted due to excessive heat. I just replace that belt and I could not find a problem with either pulley or bearing, I heard nothing was I rotated them, and it seems as if everything is aligned correctly. Prior to leaving I have my local shop inspect and adjust all belt, and was told they were all correct. this is the 2nd time this same belt cause me a problem, the first time it just broke, and this time it came off. I would hate to think this belt will continue stopping me from using the motor-home, so far it has been the problem every time.
I have not yet found the reason for the battery drain, the motor-home ran with no problem until I turned it off and then it would not restart the entire bank of battier were all dead. I first thing that the alternator may have still been working but that would have been impossible because the water pump and the alternator belt is the same belt, so I don't know what was power the draining if the batteries were dead and the alternator was no longer powering it due to the broken belt.
I guess I will replace the radiator and replace both the water pump and alternator with a larger ones if this will solve my problem, but not sure it will if the root problem remains this damm belt
Also I have some concernn about my reefer. When it is plugged in to house power it cool great, but as soon as I unplugged it and turn it to DC, it warmed up some and seems as if it help to create my battery drain. I could have used propane but having to turn it off every time I fuel didn't seem like a good idea. This is a Norcold 3 way reefer that the PO replace the stock one with.