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RPM Diffusion — Professional Marine Valves

Through-hull

A through-hull fitting, or skin fitting, provides a watertight passage through the hull for an intake or a discharge. It is held by an inside nut; a seacock or a hose tail is then screwed onto it.

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Models range from DN8 to DN200, in bronze, brass, chrome-plated brass or 316 stainless steel, including a mirror-polished version. The Guidi range includes several series: standard or countersunk head, 2000, Export, Speedy and L (long body) series, a through-hull with hose tail, and versions with a grille or a plug.

The Guidi data sheets for items 1260 (bronze) and 1121 (brass) state RINA approval, compliance with UNI EN ISO 9093-1 and a parallel ISO 228-1 thread; in bronze, the 8-inch size has an M216 x 3.5 thread. ISO 9093, revised in 2020, covers seacocks and through-hull fittings for craft up to 24 m.

Below the waterline in seawater, the site's seawater intake configurator recommends bronze or stainless steel rather than brass. It then suggests the seacock, hose tail, hose and clamps that match the chosen through-hull.

Brands: Guidi and RPM.

23 products