UL Standards free download UL 565-2013 pdf download – Liquid-Level Gauges for Anhydrous Ammonia and LP-Gas UL 565-2013 pdf download - Liquid-Level Gauges for Anhydrous Ammonia and LP-Gas. 4 Assembly 4.1 A gauge, when not assembled by the manufacturer as a unit, shall be arranged in as few subassemblies as practical; and shall... 02-12 Download Now