UL 2443 BULLETIN

Abstract

Scope: General  Each shipment of flexible sprinkler hose with fittings shall be provided with installation instructions that shall include at least the following: a)Reference to use in accordance with NFPA 13, 13D or 13R; b)Largest K-factor and orifice diameter of sprinkler intended to be connected to the fitting; c)Lengths of available flexible sprinkler hose with fittings; d)Equivalent length values of the assemblies; e)Instructions for securing the hose with fittings to the anchoring components; f)Instructions for securing the anchoring components to the building components. If intended for use with drop ceilings, reference to specific ceiling constructions such as intermediate and heavy duty ceilings as described in the Standard Specification for the Manufacture, Performance, and Testing of Metal Suspension Systems for Acoustical Tile and Lay-in Panel Ceilings, ASTM C635 when installed in accordance with the Standard Practice for Installation of Metal Ceiling Suspension Systems for Acoustical Tile and Lay-In Panels, ASTM C636; g)Information related to the permitted installation orientation and bending of the flexible sprinkler hose including the minimum bend radii; h)Pressure rating; i)Maximum ambient temperature rating; j)Intended use in wet systems dry systems or both wet and dry systems; k)Indication as to whether the hose and fittings have high flexibility or limited flexibility; and l)Intended use for direct connection to fire sprinklers.; m)Nominal size of inlet and outlet.; n)Maximum span between end brackets where the span is not fixed; and o)Reference to the compatible rubber gasketed fitting if the inlet connection is provided with a proprietary groove.