90° Elbow Thru-Hull Connector for Ø38 mm Hose (Plastic)

This 90° elbow thru-hull fitting combines the function of a scupper (hull drain) and a hose connector in one unit. It’s specifically designed for marine drainage systems – for example, routing water from the cockpit, deck, or a pump discharge directly overboard. With the integrated interior elbow, a 38 mm hose can run parallel to the hull immediately after the opening, which simplifies hose routing in tight spaces and prevents kinks. The plastic material is resistant to salt and chemicals, ensuring long service life under harsh conditions.

• Applications: Ideal for medium to larger boats (~6–9 m) equipped with self-bailing cockpits or large drain outputs. Commonly used as a deck scupper to drain rainwater from the cockpit, as an outlet for high-capacity bilge pumps, or for livewell/baitwell drains where a large diameter is needed for fast outflow
• Installation: Install by cutting a circular hole in the hull matching the fitting’s threaded section. Insert the thru-hull from the outside, then thread on the provided locking nut from the inside. It’s advisable to apply marine silicone around the outer flange for extra waterproofing. Before fully tightening, orient the elbow barb inside to point toward the direction where your hose will run. Once aligned, tighten the nut securely to clamp the fitting to the hull (ensure the flange is snug and sealed)
• Design: The external flange is broad and flat, allowing a good seal against the hull and distributing the nut’s clamping force to prevent cracks. The internal 90° elbow arm is molded in one piece – no seams that could leak. The hose barb is precisely sized for standard 38 mm hose, ensuring a tight fit; secure the hose with a clamp for complete leak-free performance
• Material: The plastic used is UV-stabilized, so prolonged sun exposure won’t make it brittle. It also withstands temperature swings and can handle contact with fuels or oily bilge water that might be present, meaning it will hold up in engine compartments or bilges without degrading
• Advantages: Using this 90° thru-hull eliminates the need for an additional elbow fitting inside – reducing the number of connections (and potential leak points) in your system. You achieve a clean exterior look, as only the low-profile round flange is visible on the outside with no protruding parts. The all-plastic design means no metal to rust and it’s lighter in weight compared to metal thru-hulls, contributing less stress on your hull structure