UL 448B:2017-12 Residential Fire Pumps Intended for One- and Two-Family Dwellings and Manufactured Homes

UL 448B:2017-12 Residential Fire Pumps Intended for One- and Two-Family Dwellings and Manufactured Homes. 1.1 These requirements cover fire pumps intended for use in water-supply systems for one- and two-family dwellings and manufactured homes. 1.1 effective December 23, 2010 1.2 The pumps covered by these requirements are intended for installation and use in accordance with the Standard for the Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes, NFPA 13D. 1.2 effective December 23, 2010 2 Components 2.1 Except as indicated in 2.2, a component of a product covered by this standard shall comply with the requirements for that component. 2.1 effective December 23, 2010 2.2 A component is not required to comply with a specific requirement that: a) Involves a feature or characteristic not required in the application of the component in the product covered by this standard, or b) Is superseded by a requirement in this standard. 2.2 effective December 23, 2010 2.3 A component shall be used in accordance with its rating established for the intended conditions of use. 2.3 effective December 23, 2010 2.4 Specific components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specified limits, and shall be used only under those specific conditions. 3 Units of Measurement 3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 3.1 effective December 23, 2010 4 Undated References 4.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 4.1 effective December 23, 2010 5 Glossary 5.1 For the purpose of this standard, the following definitions apply. 5.1 effective December 23, 2010 5.2 CORROSION-RESISTANT MATERIAL — A material having resistance to corrosion equivalent to or exceeding that of a brass or bronze alloy, or series 300 stainless steel. 5.2 effective December 23, 2010 5.3 PRESSURE, MAXIMUM WORKING — For performance tests specified in this standard, the maximum pressure developed at the pump discharge flange under any condition of intended use determined by the sum of the maximum net pressure developed by the pump and the allowed positive suction pressure. For production tests, this value may be lower, based on the conditions imposed by the particular installation for which the pump is...