CAN/ULC-S520-M91

1.1 This Standard covers barrel-type hydrants with compression shut-off and slide gate shut-off, for general water works service. 1.2 Hydrants shall be designed for a minimum working pressure of 1000 kPa. 1.3 Hydrants of special design, including those having built-in hose gates, and hydrants designed for higher working pressure are not covered by this Standard. 1.4 Hydrants with replaceable sections or components that are specially designed with lower breaking points than the rest of the unit are not explicitly covered in this Standard. Except for the specially designed breakable sections or components, however, such hydrants shall conform to all other requirements of this Standard. 1.5 This Standard does not cover wet barrel type hydrants. 1.6 References to the setting and drainage of hydrants are not included in this Standard.