Section 162.027-3 - Design, construction, testing, and marking requirements(a) Each combination solid stream and water spray firehose nozzle required to be approved under the provisions of this subpart must be of brass or bronze, except for hardware and other incidental parts, which may be of rubber, plastic, or stainless steel, and designed, constructed, tested, and marked in accordance with the requirements of ASTM F 1546 or NFPA 1964 (incorporated by reference, see § 162.027-2 ).(b) All inspections and tests required by ASTM F 1546 or NFPA 1964 must be performed by an independent laboratory accepted by the Coast Guard under subpart 159.010 of this chapter. A list of independent laboratories accepted by the Coast Guard as meeting subpart 159.010 of this chapter may be obtained by contacting the Commandant (CG-ENG-4).(c) The independent laboratory must prepare a report on the results of the testing and must furnish the manufacturer with a copy of the test report upon completion of the testing required by ASTM F 1546 or NFPA 1964.USCG-2012-0196, 81 FR 48277, July 22, 2016