scope:

This standard encompasses the design and performance requirements for 1 inch through 8 inch nominal size water flow detector testers. In cases where metric sized products are to be examined for Approval, test criteria comparable to the equivalent or nearest nominal size shall be used.

This standard encompasses both traditional mechanical type water flow detector testers (where the water flow detectors are tested by the passage of water past the vane), and electrical style (where the water flow past the water flow detector is electrically simulated).

Approval Standards are intended to verify that the product described will meet stated conditions of performance, safety and quality useful to the ends of property conservation.

Purpose

This standard states FM Approvals criteria for water flow detector testers for use in wet pipe sprinkler systems, for both new installations, and for retro-fit applications.

Approval criteria may include, but are not limited to, performance requirements, marking requirements, examination of manufacturing facility(ies), audit assurance procedures, and a follow-up program.