Beach:
In Santa Clara County when I called for my footing inspection I presented the municipal inspector my Soils engineers approval letter, my Chapter 17 Special inspection letter, my structural engineer's structural observation of the foundation letter, and my General Contractor's Chapter 17 letter, then we started walking the footings, the first one had an old PVC sprinkler line running through the corner of the footing, the inspector asked: "What's that plastic doing down there?", I said it's an old abandoned sprinkler line." He said: "Get it out of there, we don't allow any plastic in my jurisdiction." I called a man to remove it, we walked the rest of the footings and he found nothing wrong, he then checked to see if the plastic had been removed and signed me off.
In 1968 I was remodeling the Building Department in the basement of the old San Leandro City Hall, the CBO was inspecting my work, he came to me saying he was going to Hawaii and introduced me to the Deputy Building Inspector who would be handling my work while he was gone. I made a wisecrack about only building inspectors could afford to vacation in Hawaii, he said: "The plastic pipe industry is paying for it, I'll take their money but it'll be a cold day in Hell before they'll ever put plastic pipe in my town." It's 44 years later and he's long gone, but San Leandro still doesn't allow plastic pipe, from their current website (highlighted in yellow in the original):
It should be noted that the above codes have been modified by the State of California and the City of San Leandro to include various additional requirements based on local conditions. For instance, the Plumbing Code has been amended to prohibit the use of plastic pipe (i.e. ABS and PVC) within the drain, waste and vent system of a building. And the structural provisions of the Building Code have been modified to address earthquake design standards. ¹
They don't mention fire sprinkler pipe, but it carries the same social stigma.
BTW, maybe the German pipe doesn't have the terrific rate of lineal expansion as our CPVC? Also, that 5,417 square foot home I'd put down a permit valuation of $2.7 million, the AHJ would argue for $5.4 million, we'd compromise somewhere in between, the permit valuation would be the basis for the assessment and the Assessor would go nuts if he got the permit records showing a home built in an area of $6 million lots at $175.37 a square foot, I don't know what you guys do in Tinseltown, but you can't build the foundation for that around here.
¹
http://www.sanleandro.org/depts/cd/bldg/bldgcodes.asp