Če je cev sestavljena iz več delov, morajo biti ti sestavljeni bodisi s posebnimi konektorji, ki omogočajo, da ostane cev polna, ali s priključnim sistemom, ki je zaščiten z zaščitno oznako ali pa pri katerem posameznih delov praktično ni mogoče razstaviti brez posebnega orodja.
If the hose comprises several components, these shall be assembled either by means of a special connector to keep the hose full or by a connection system which is either sealed or ensures that the components are virtually impossible to separate without a special tool.