EN  16582-1 Clause 5.4）4.6.4Stairs4.6.5Load-bearing  test4.7Permissible  openings4.8Crushing and entrapment hazards4.9Filtration  and circulation4.9.1General4.9.2Spas  that do not rely on circulation and filtration4.10Pipe  Work4.11Suction  System4.12Water  treatment and chemical standards4.13Heating4.14Energy  efficiency4.15Covers  and cabinets4.15.1General4.15.2Cover  lifters4.16Accessories  and features4.16.1Accessories4.16.2Use  of non-water treatment chemicals4.16.3Electrical  accessories5Point  of purchase information6Installation,  operation and maintenance manual7Marking

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