Fire hydrant spacing and type of hydrant, by type of land development. See Table 57.507.3.2.
1. Every first story dwelling unit, first story guest room, and all first story portions of any commercial or industrial building must be within 300 feet of an approved fire hydrant.
2. All fire hydrants shall have 2 1/2-inch x 4-inch outlets or 4-inch x 4-inch outlets and conform to the minimum standards of the American Water Works Association for wet barrel hydrants. A minimum of one fire hydrant is to be provided at each intersection. “Built-up” type single 2 1/2-inch outlet hydrants (6-inch pipe surmounted by an angle valve) shall be used in areas having a static water pressure of 210 P.S.I. or more.
3. Streets with raised median center dividers, excessive traffic loads, or more than 80 feet in dedicated width require the installation of hydrants on both sides of the street. Additional intermediate hydrants are required in areas where restricted access, depth of lots, or blocks exceeding the maximum hydrant spacing intervals exist.
Type of Land Development | Net Land Area Served Per Hydrant | Distance Between Hydrants on Roads and Fire Lanes | Type of Hydrant |
Low Density Residential | *150,000 Sq. Ft. | 600 Ft. | 2 1/2-inch x 4-inch Double Fire Hydrant |
High Density Residential & Neighborhood Commercial | *100,000 Sq. Ft | 300 - 450 Ft. | 2 1/2-inch x 4-inch Double Fire Hydrant |
Industrial & Commercial | *80,000 Sq. Ft. | 300 Ft. | 2 1/2-inch x 4-inch Double Fire Hydrant or 4-inch x 4-inch Double Fire Hydrant |
High Density Industrial & Commercial | *40,000 Sq. Ft. | 300 Ft. | 4-inch x 4-inch Double Fire Hydrant |
*This figure will be systematically reduced where greater fire-flow is required due to restricted access, depth of lots, length of blocks, or additional hazards.