Anyway, here is what I did - I bought new Frostex heat cable and a new end and plug kit. I got the old removed and saved the old foam pipe wrap tubes that they used for insulation. They only used 1/2" insulation before - according to the Frostex instructions that only protected me to 20 degrees. Here in Iowa it can get -20 with no problem what-so-ever.
So I got the new heat cable attached to the pex, replaced the 1/2" foam tubes and secured them to the pex and then I took 16"w x 2" thick x 48" long pieces of multi purpose fiberglass insulation and wrapped that around the pex/foam tubes. I then took heavy - 6 mil I think plastic and wrapped that around the fiberglass/foam/pex.
I used some cement blocks to elevate the water line assembly off the ground. I also used some foam pipe insulation tubes to insulate down into the crock. I placed the heat cable about 18" down into the crock and back up so the plug end was up and out of the crock. I plan on placing some fiberglass insualtion in the crock too.
So, it was not too bad of a job...I have a nice amount of insulation and according to Frostex's chart we should be protected down to -40 degress or more. I hope it does not get that cold!
It was raining out today, but it was nice and dry under the house - excpet for a few spots that the plastic in damaged - that is the next project
Thanks to all for the tips I received!