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Existing buildings which require standpipes under Section 15-16-090(d) only, shall use the following design requirements to comply with this code:
1. Such building is equipped with one four-inch inside standpipe riser where the ground area of the building does not exceed 20,000 square feet and an additional four-inch inside standpipe riser where the ground area of the building is over 20,000 square feet.
2. Each such standpipe riser is equipped, in the basement and on each floor level, with a one and one- half inch connection with 75 feet of hose attached, and also a two and one-half inch valve and connection provided with standard Chicago fire department thread.
3. In such buildings, equipped throughout with an approved system of automatic sprinklers, sprinkler risers, which are not less than four inches in diameter, may be used in lieu of inside standpipe risers.
4. Such building is equipped with a siamese pumper connection.
5. The standpipe or sprinkler risers are maintained wet at all times.
6. The piping, fittings and equipment used in connection with such risers shall be capable of withstanding the water pressure required for fire extinguishment.
7. The location and equipment of such risers are approved by the fire commissioner.
(Prior code § 91-100; Amend Coun. J. 10-30-96, p. 31261, § 1; Amend Coun. J. 5-18-16, p. 24131, § 132)