"Ross Hebeisen" wrote in message
...
just because you think i'm crazy do'snt mean i'm not. but i still think
i'm right in puttig the pex in the sand.
1) heat tends to go up not down

No, it doesn't . Heat go to places that have less heat. That can be any
direction. YO want insulation under hte pex to force the heat up.


2) ground holds it's own thermo temp

Yes, it is less than heated pex and will absorb the heat from it until it
gets to the center of the earth which is hotter.