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UL 1726 Ed. 4-2024

Automatic Drain Valves for Standpipe Systems - Published Date: December 3, 2024

This new Fourth Edition of UL 1726 dated December 3, 2024 includes the following changes:  – Add 300 series stainless steel to list of corrosion resistant materials, 5.1;  – Add new Metallic Materials section, Section 6;  – Update wording of the Leakage Test, 11.1 and 11.2;  – Change hydrostatic pressure requirement to four times rated working pressure, 12.1 and 12.2;  – Add new section Installation Instructions; and  – Editorial revisions and formatting updates throughout this Standard.

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