First off I want to thank everyone for a free education very, very helpful. I think the question has been answered . Plastic is out of the question period. I still don't understand how to remove the proper Pex fittings, if I cut the crimp ring off , how is it possible to pull the tube off of the bar...

More Floor pictures

Repaired
I have more pictures to show a lot more steps.
The floor joist are 2x6 on 21 inch centers and run parallel to the side rails, which left no support under a 400lb refer

Wow that's a good video those are the ones installed by the factory.
First picture is under the sink, the small blue line is from R/O system to the ice maker.
had lots o mold to clean up.

I found this on the net,,, these are what we have !!

http://www.pplmotorhomes.com/parts/rv-p ... ttings.htm


http://mobilehomedepotmi.com/mh_catalog1/flair-it.html


I agree they used improper products at the factory

Thanks
Jim

Greg

The tube has not cracked.
All the fittings are white either plastic or maybe nylon, all the homes with problems have the same fittings.
Absolutely no metal any where, that is why I choose the metal Sharkbite fittings.
There are no crimp rings.
Jim

We have Blue for cold water and The Red for hot water. The tubing itself did not crack just the white fittings. I just checked the ones I cut out there are NO metal crimps they have plastic type crimps or maybe you call them compression fittings. I will try to post more info on those with some pictu...

I have reply to this one. We purchased a 2006 used mobile home and in short the crimped fittings on the Pex tubing have cost me thousands of dollars. A point to remember , you can't take those crimped fittings apart, you have to cut the tubing to remove them. In %100 of my replacements the tubing is...