ULC CAN/ULC 548:2015 (R2025) Standard for Devices and Accessories for Water Type Extinguishing Systems

PREFACE

This is the Fourth Edition of CAN/ULC 548, Standard for Devices and Accessories for Water Type Extinguishing Systems.

This Edition of the Standard has been formally approved by the ULC Standards Technical Committee on life safety accessory devices.

This Standard has been developed in compliance with the requirements of SCC for accreditation of a Standards Development Organization.

Only metric SI units of measurement are used in this Standard. If a value for measurement is followed by a value in other units in parentheses, the second value may be approximate. The first stated value is the requirement.

Appendix A, identified as Normative, forms a mandatory part of this Standard.

In Canada, there are two official languages, English and French. All safety warnings must be in French and English. Attention is drawn to the possibility that some Canadian authorities may require additional markings and/or installation instructions to be in both official languages.

This Fourth Edition National Standard of Canada is based on, and now supersedes, the Third Edition CAN/ULC-S548-08.

Attention is drawn to the possibility that some of the elements of this Canadian standard may be the subject of patent rights. ULC Standards shall not be held responsible for identifying any or all such patent rights.

Requests for interpretation of this Standard should be sent to ULC Standards. The requests should be worded in such a manner as to permit a “yes” or “no” answer based on the literal text of the requirement concerned.

This CAN/ULC 548 Standard is under continuous maintenance, whereby each revision is approved in compliance with the requirements of SCC for accreditation of a Standards Development Organization. In the event that no revisions are issued for a period of four years from the date of publication, action to revise, reaffirm, or withdraw the standard shall be initiated.

Comments or proposals for revisions on any part of the Standard may be submitted at any time. Proposals should be submitted via a Proposal Request in the Collaborative Standards Development System (CSDS) at https://csds.ul.com.

This Standard is intended to be used for conformity assessment.

SCOPE

1.1 This Standard contains requirements for alarm initiating devices, supervisory detecting devices and accessories for automatic water supply control valves for attachment to water type extinguishing systems (such as, but not limited to wet, dry, pre-action and deluge type sprinklers, residential sprinklers, water mist suppression systems, water spray fixed extinguishing systems, water motors, gongs and standpipe systems), as follows:

A Alarm initiating devices, including but not limited to:

(i) Vane and paddle type waterflow switches; and

(ii) Pressure actuated waterflow switches;

B Supervisory indicating devices, including but not limited to:

(i) Pressure supervisory switches;

(ii) Shut-off valve position supervisory switches;

(iii) Water level supervisory switches; and

(iv) Temperature supervisory switches.

C Accessories for automatic water supply control valves, including but not limited to:

(i) Water motors and gongs; and

(ii) Other electrical and non-electrical components or units commonly used.

1.2 Valve position supervisory devices may be of a design suitable for the supervision of gate, butterfly, ball or post-indicator type valves.

1.3 The requirements of this Standard cover devices suitable for installation in ordinary (non-hazardous) indoor and outdoor locations.

1.4 The products covered by this Standard are intended for installation in accordance with the following:

A CAN/ULC 524, Standard for Installation of Fire Alarm Systems;

B CSA C22.1, Canadian Electrical Code, Part I, Safety Standard for Electrical Installations;

C NFPA 13, Standard for the Installation of Sprinkler Systems;

D NFPA 14, Standard for the Installation of Standpipe and Hose Systems;

E NFPA 15, Standard for Water-Spray Fixed Systems for Fire Protection; and

F NFPA 750, Standard on Water-Mist Fire Protection Systems.