CSA C309:M90 (R2024)

Preface This is the second edition of CSA Standard CAN/CSA-C309, Performance Requirements for Glass-Lined Storage Tanks for Household Hot Water Service. This Standard covers electrically, gas-fired, and oil-heated storage tanks. It supersedes the first edition published in August 1977, shall be the standard. Dimensions have been converted to SI (metric) units, which values shall be standard. The yard-pound (Imperial) units given in parentheses are provided for information only. This standard was prepared by the Technical Committee on Electrical Storage-Tank Water Heaters under the jurisdiction of the Standards Steering Committee on the Performance of Electrical Products and was formally approved by these Committees. It has been approved as a National Standard of Canada by the Standards Council of Canada. Scope 1.1 This Standard applies to glass-lined storage tanks for household hot water service. Requirements are given for base metal, construction, glass lining, cathodic protection, inspection, and testing. 1.2 This Standard covers glass-lined storage tanks at the point of manufacture, having 610 mm (24 in) inside diameter and less, with a maximum working pressure of 1034 kPa (150 psi), and subject to maximum input limitations as follows: (a) electric - single element, 4500 W; (b) electric - double element, 4500 W upper, 4500 W lower, flip flop circuit (alternate operation); (c) oil-fired - 2.84 L/h (0.75 US gal/h) or less; and (d) gas-fired - less than 21 980 W (75 000 Btuh). 1.3 The values given in SI (metric) units are the standard. The values given in parentheses are for information only.