Pipe Unions for Flammable and Combustible Fluids and Fire-Protection Service
standard by Underwriters Laboratories, 12/15/2014

Performance Requirements for Toxic Gas Detectors
standard by Underwriters Laboratories, 12/23/2010

DC Power Capacitors
standard by Underwriters Laboratories, 05/25/2016

Heating, Water Supply, and Power Boilers – Electric
standard by Underwriters Laboratories, 04/13/2004

Humidifiers
standard by Underwriters Laboratories, 04/25/2011