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3. The hose will be of a sufficient length where friction loss <br /> resulting from water flowing through the hose will not <br /> decrease the pressure at the nozzle below 30 psi. <br /> 4. The minimum water supply for the hose will be sufficient <br /> to provide 100 gallons per minute for a period of at least <br /> 30 minutes. <br /> d. The hose system must be properly maintained. Water <br /> supply tanks will be filled to the proper level and pressure <br /> must be maintained where pressure tanks are used. <br /> e. The hose system will be inspected at least annually and <br /> after each use to assure that all of the equipment and hose <br /> are in place, available for use, and in serviceable condition. <br /> f. Hemp or linen hose on existing systems will be unracked, <br /> inspected, and reracked using a different fold pattern at <br /> least annually. <br /> g. If the system or any portion is found not to be serviceable, <br /> it will be removed from service immediately and replaced <br /> with equivalent protection such as extinguishers or fire <br /> watches. <br /> 3. Automatic Sprinkler Systems <br /> All automatic sprinkler systems installed prior to 1981 are <br /> acceptable providing they comply with the National Fire Protection <br /> Association or the National Board of Fire Underwriters standards. <br /> a. The sprinkler design must provide the necessary discharge <br /> patterns, densities, and water flow characteristics for <br /> complete coverage in a particular workplace or zoned <br /> subdivision of the workplace. <br /> b. The automatic system must be provided with at least one <br /> automatic water supply capable of providing a designed <br /> water flow for at least 30 minutes. <br /> C. An auxiliary water supply or equivalent protection will be <br /> provided when the automatic water supply is out of service, <br /> except for systems of 20 or fewer sprinklers. <br /> ,J <br />