scope:

This standard encompasses the design and performance requirements of vane-type waterflow alarm indicators for use in aboveground automatic sprinkler systems designed and installed in accordance with FM Global Property Loss Prevention Data Sheets.

This Approval Standard encompasses Nominal Pipe Size (NPS) 1, 1-1/4, 1-1/2, and 2 inch vane-type waterflow alarm indicator that are installed in piping via threaded connection.

This Approval Standard encompasses NPS 2, 2-1/2, 3, 4, 5, 6, and 8 inch vane-type waterflow alarm indicators that are installed in piping via a pre-cut hole in system piping with a U-bolt connection.

The minimum rated working pressure for vane-type waterflow alarm indicators evaluated using this standard is 175 psi (1205 kPa).

This standard is 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 Approval requirements for vane-type waterflow alarm indicators for installations in automatic sprinkler systems. Other applications shall be evaluated on a case-by-case basis.

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