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Section 903.3.5, Water supplies, shall be amended to read as follows: <br />"903.3.5, Water supplies. Water supplies for automatic sprinkler <br />systems shall comply with this section and the standards referenced in Section <br />903.3.1. The potable water supply shall be protected against backflow in <br />accordance with the requirements of this section and the International <br />Plumbing Code. For connections to public waterworks systems, the water <br />supply test used for design of fire protection systems shall be adjusted to <br />account for seasonal and daily pressure fluctuations based on information <br />from the water supply authority and as approved by the fire code official. <br />"Water supply as required for such systems shall be provided in <br />conformance with the supply requirements of the respective standards; <br />however, every water-based fire protection system shall be designed with a <br />10 psi safety factor. Reference Section 507.4 for additional design <br />requirements." <br />Section 903.3, Installation requirements, shall be amended by adding Section <br />903.3.9, Automatic sprinkler system room access, to read as follows: <br />"903.3.9 Automatic sprinkler system room access. The entrance to <br />the riser room or area of fire appurtenances will be labeled." <br />Section 903.4, Sprinkler system supervision and alarms, shall be amended to add <br />a paragraph after the exceptions, to read as follows: <br />"Sprinkler and standpipe system water -flow detectors shall be <br />provided for each floor tap to the sprinkler system and shall cause an alarm <br />upon detection of water flow for more than 45 seconds. All control valves in <br />the sprinkler and standpipe systems except for fire department hose <br />connection valves shall be electrically supervised to initiate a supervisory <br />signal at the central station upon tampering." <br />Section 903.4.2, Alarms, shall be amended to add a second paragraph, to read <br />as follows: <br />"The alarm device required on the exterior of the building shall be a <br />weatherproof horn/strobe notification appliance with a minimum 75 candela <br />strobe rating, installed as close as practicable to the fire department <br />connection." <br />Section 905.2, Installation standard, shall be amended to read as follows: <br />28 <br />