UL Subject 213
Standard for Rubber Gasketed Fittings for Fire-Protection Service (CSDS Proposal, 9/2/2011)
standard by Underwriters Laboratories, 09/02/2011
UL Subject 2523
Standard for Solid Fuel-Fired Hydronic Heating Appliances, Water Heaters, And Boilers (CSDS Proposal, 9/2/2011)
standard by Underwriters Laboratories, 09/02/2011