This part of IS0 9093 specifies requirements for metallic through-hull fittings, seacocks and hose fittings that specifically form part of water intake and discharge lines, and for wet exhaust outlets used in small craft of up to 24 m length of hull. Through-hull fittings for other purposes are not covered. This part of IS0 9093 applies to seacocks and through-hull fittings with cylindrical pipe threads in accordance with IS0 228-1, and with joints for conical pipe threads in accordance with IS0 7-1, with nominal
diameters of l/4 in, 3/8 in, l/2 in, 3/4 in, 1 in, 1 l/4 in, 1 l/2 in, 2 in, 2 l/2 in, 3 in or 4 in.
NOTE 1 The reasons for developing this part of IS0 9093 are that detail dimensions of components of water intake and discharge lines, and wet exhaust outlets passing through a craft hull differ considerably, thus limiting the interchangeability of these parts.
Um die leichte Austauschbarkeit von Seeventilen und Schläuchen bzw. wassergekühlten Auspuffleitungen sicherzustellen, wurden die Anforderungen und Abmessungen für diese Teile aber für die an die metallische Außenhautdurchführung festgelegt. Die Anforderungen beziehen sich auf Wasserfahrzeuge bis 24 m Rumpflänge.