In 1999 the City Council authorized the use of CPVC pipe as an approved material for certain types of sprinkler installations. DOB has prepared a table (below) summarizing the locations where CPVC pipe can be used. Also note that the DOB has promulgated a Rule (29-09) which sets forth other requirements for using CPVC pipe for sprinklers (e.g. individuals installing pipe must have certification of training from manufacturer on site, minimum cure times for solvents, etc.)  

Installation Types / Location	CPVC Pipe	Steel Pipe
Wet Sprinkler systems	X	X
Dry Sprinkler Systems		X
One and two family dwellings	X	X
Manufactured homes	X	X
Residential dwellings up to six stories in height	X	X
Commercial Buildings	X
Commercial Floors in mix use buildings (up to six stories in height)		X
Residential floors in mix use buildings (up to six stories in height)	X	X
Risers or branch lines passing through Commercial floors		X

Note: There are many restrictions and cautions when using CPVC pipe and fittings. (See Rule 29-09)