CAN/ULC-S507-92

1. Scope 1.1 These requirements cover the construction and operation of 9 Litre stored pressure water type fire extinguishers. 1.2 Stored pressure water type fire extinguishers shall also comply with the requirements of the Standard for the Rating and Fire Testing of Fire Extinguishers, and Class D Extinguishing Media, CAN/ULC-S508. 1.3 A stored pressure water type fire extinguisher is one employing a single chamber for both the extinguishing media and the expellant gas. 1.4 These extinguishers shall be charged with water. EXCEPTION: When stored or used in temperatures below 0°C, an antifreeze(loaded-stream or alkali-metal-salt) solution shall be used. NOTE: Reference to each applicable Test Method for a requirement is indicated by the letters TM and the appropriate clause number in parentheses in the right hand margin.