A new law signed by the governor of Illinois in
early August allows fire protection districts to give financial incentives to
people who install automatic fire sprinkler systems in their homes.
The most commonly used steel pipe for sprinkler systems is black steel pipe. Copper tubing is another piping material listed for sprinklers in NFPA 13. Also, plastic pipe (namely, CPVC and PEX tubing) is permitted for certain types of sprinkler systems.