I think I mentioned in another post that a highway is coming thru where our house was, and we have moved it and are building a new house.
Any way I have my H2 Hardy temporarily hooked up 25' behind our house sitting on two railroad ties, I ran two pex lines to the house, put them in cheap foam pipe insulation and wrapped them in reflextix and taped it about every 6 inches. It is just laying on top of the ground.
It is doing a whole lot better than it did the past 12 years when it was buried 3' deep in 6" pvc pipe with no insulation.
It snowed overnight and didn't melt on top of the reflectix. I am impressed at this point.
I can't believe a local installer just buries the pex 18" in the bare ground.