TY - RPRT TI - Comparison of fire sprinkler piping materials: steel, copper, chlorinated polyvinyl chloride and polybutylene, in residential and light hazard installations PY - 1994 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST IR 5339 DO - 10.6028/NIST.IR.5339 ER -