UL-1821 › Complete Document History
Standard for Thermoplastic Sprinkler Pipe and Fittings for Fire Protection Service

Complete Current Edition:
   CHANGE 05/17 - REVISION CHANGE - CODE B - May 5, 2017
   4TH EDITION - Thermoplastic Sprinkler Pipe and Fittings for Fire Protection Service - July 30, 2019

Obsolete Revision Information:
   3RD EDITION - Standard for Thermoplastic Sprinkler Pipe and Fittings for F - Aug. 25, 2015
   CHANGE 12/11 - REVISION CHANGE - CODE A - Dec. 15, 2011
   CHANGE 04/05 - REVISION CHANGE - CODE A - April 20, 2005
   2ND EDITION - THERMOPLASTIC SPRINKLER PIPE & - April 23, 2003
   1ST EDITION - THERMOPLASTIC SPRINKLER PIPE & - Jan. 1, 1994