Marine Skin Fittings

Marine Skin Fittings for Through-Hull Plumbing

Marine skin fittings create inlet or outlet points through the hull for plumbing systems such as drains, pump discharges, cooling water, tank vents or other service lines. Because these fittings sit at a critical connection point, selection should be based on the application, size, material, hose connection and access around the installation area.

For replacements, carefully identify the existing opening size and the connected hose or fitting type before ordering. A skin fitting may look simple, but a mismatch can affect how the hose sits, whether clamps have enough contact area and how the surrounding plumbing is supported. If the old fitting is being removed due to damage or age, inspect the connected hose and nearby hardware at the same time.

Matching fittings to the plumbing run

Skin fittings are commonly paired with marine valves, hose tails, clamps, gaskets and strainers. Consider how the part will be serviced after installation. A fitting tucked behind a panel can make later checks difficult, while tight bends in the hose can place unnecessary strain on the connection.

• Confirm hull opening size, hose size and connection type before replacing a fitting.
• Check whether the fitting is for drainage, intake, venting or discharge use.
• Leave room for clamps, hose bends and inspection access.
• Review the wider marine plumbing supplies category if other parts in the same run also need attention.

For pumps, toilet systems and general pipework, browse their own category pages to narrow down the right part.