FM Approvals 1056


Sight Drains for Automatic Sprinkler SystemsFM Approvals / 01-Dec-2010 / 19 pages

This standard states FM Approvals criteria for sight drains for use in automatic sprinkler systems. They are used to allow visual verification that water is flowing through a pipe. Typical installations include main drain lines and in close proximity to inspector's test devices when discharge flow is not readily visible

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