CAN/CSA-C309-M90 (R2014)

1. 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.