Bulkheads, Kingstons, and Through-hulls

Stainless AISI 316 intake strainer thru-hull fittings (also known as “Kingston” strainers) designed with a built-in scoop or grill to filter out debris. Available in sizes from 3/8" up to 1-1/2", these thru-hulls mount on the hull exterior (typically at the bottom or side) to serve as water intakes for engine cooling, generators, air conditioning systems, or livewell pumps. The external scoop cover has slots/holes that face forward (for scoop types) or flush grids (for low-profile strainers), allowing water in while keeping weeds, trash, or marine life out. Made from rugged 316 stainless steel, they ensure maximum flow and corrosion resistance. Internally, they connect to your seacock or hose like a standard thru-hull. These strainers are essential for protecting pumps and engines from clogging, and their polished stainless appearance complements any hull.

• Material: AISI 316 stainless steel – corrosion-resistant in seawater, strong construction
• Sizes: 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2" thread/pipe sizes to match intake hose/valve requirements
• Design: Scoop/strainer head on outside (with grill openings), threaded thru-hull body, interior nut for mounting
• Function: Intake water for engines, gensets, air conditioners, bait tanks – strainer prevents entry of debris for reliable cooling and pumping

High-quality threaded thru-hull fittings made from AISI 316 stainless steel, available in a range of pipe thread sizes from 3/8" up to 2". These thru-hull connectors (sometimes called bulkhead fittings) feature a flange/head on one end and male pipe threads on the other, allowing secure installation through the hull or tank wall of a boat. Ideal for intake or discharge ports, they pair with seacocks, ball valves, or hose connectors on the interior side. With superior corrosion resistance, these fittings ensure a watertight, long-lasting plumbing connection for bilge pump outlets, livewell drains, sink drains, engine cooling water intakes, and more.

• Material: AISI 316 stainless steel – marine-grade anti-corrosion construction
• Sizes: Available with male thread sizes 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2" (standard NPT/BSP as applicable)
• Design: Mushroom head/flange for outer hull, extended threaded shank to accommodate hull thickness and secure with a nut (if provided)
• Use: Thru-hull inlet/outlet for pumps, drains, and plumbing on boats – attach to valves or hoses inside

A 90-degree plastic hose adaptor designed to securely connect a Ø38 mm hose to tanks or hull fittings at a right angle. Made of white nylon for strength and durability in marine conditions.

• Tough white nylon construction – impact-resistant and non-corrosive in fresh or saltwater
• Connection size: 1¼″ internal threaded inlet and smooth 38 mm hose barb outlet
• 90° elbow design allows installation in tight spaces without kinking the hose
• Ideal for rigid water or fuel tanks – enables convenient angled routing of fluid lines
• Easy to install – screws into tank fitting and secures hose with a clamp for a leak-free connection

Self-bailing drain for inflatable boats (40mm cut-out diameter) with a one-way flap valve. Allows water to automatically exit the boat without letting it back in. Plastic construction with a locking cap and built-in debris strainer. Easy transom installation – keep your boat drier and safer.

• Non-return drainage: One-way flapper valve lets water flow out but closes against backwash.
• Safety cover: Lockable cap/door prevents leakage when the boat is stationary; can be opened for continuous draining underway.
• Integrated strainer: Screens out leaves and debris to prevent clogging of the drain.
• Dimensions: Fits ~40mm cut-out; plastic flange ~60mm wide; length ~11–15 cm (closed/open).
• UV-resistant, impact-proof material – durable for long-term use in fresh or saltwater.

A plastic 90° thru-hull fitting for 38 mm hose, designed to drain water outboard without bending the hose. The external flange sits flush on the hull, and the interior elbow directs the hose parallel to the surface.

• Made of impact-resistant, UV-stabilized plastic – will not corrode or degrade
• Integrated 90° elbow allows the hose to connect directly, saving space and preventing kinks
• Low-profile round outer flange provides a watertight seal against the hull
• Standard Ø38 mm hose barb – suitable for cockpit drains, pump outlets, etc., on most boats
• Easy hull/transom installation with included backing nut for secure tightening from inside

White plastic through-hull fittings for hoses, available in various diameters (from 15 mm to 38 mm). Used to route water through the boat’s hull – strong, lightweight, and non-corrosive, with easy installation and secure sealing via a locking nut.

• Made of UV-resistant, impact-proof plastic – will not corrode and ensures long service life
• Available sizes: Ø15, Ø18, Ø25, Ø32, Ø38 mm (to fit hoses of these inner diameters)
• Broad outer flange provides a tight fit and watertight seal against the hull
• Threaded neck with a plastic backing nut for secure inside fastening
• Versatile use – ideal for deck drains, bilge pump outlets, tank vent lines, and more

Flexible drain thru-hull for boats with an integrated non-return valve (one-way flap). Ø25 mm hose size, available in two length options – 120 mm and 150 mm – to suit different installation needs. Allows water to drain out automatically while preventing it from coming back in.

• Elastic tube/valve that opens under internal pressure (draining water out) and closes under external pressure (waves/backwash)
• Available in two lengths: 120 mm and 150 mm, to accommodate various transom thicknesses or desired extension beyond the hull
• White UV-resistant flexible material – withstands saltwater, sunlight, and temperature changes
• Easy installation through hull (25 mm hole) secured with a nut – the valve extends outside the hull to let water out
• Ideal for small boats, RIBs, and jet skis (3–5 m) – provides self-bailing when the boat is moving and protects against backflow when stationary

A plastic thru-hull fitting with an integrated non-return flapper valve, 25 mm diameter. Allows water to drain out through the hull while automatically closing to prevent backflow. Compact design for easy hull installation with included nut.

• Built-in one-way “flap” valve – lets water out but blocks incoming flow from outside
• 25 mm hose barb – fits 25 mm (1″) hoses for bilge pumps or drains
• Wide outer flange (54 mm) ensures watertight sealing and stability on the hull surface
• Plastic material (white) – non-corrosive, saltwater-proof and UV resistant
• Ideal for drain outlets near the waterline on small boats – protects against backwash from waves or when stopping

A : 33 mm

B : 25 mm

C : 84 mm

D : 54 mm

E : 40 mm

Durable plastic through-hull drain fitting with internal threads for a secure plug. Ideal for small craft bilge draining and transom installation, available in 27 mm, 30 mm, and 33 mm sizes.

• Sturdy UV-resistant plastic construction ensures long life in marine conditions.
• Internal thread allows use with a drain plug for watertight closure when needed (plug sold separately).
• Three size options (27, 30, 33 mm) to accommodate different boats and drainage requirements.
• Easy installation on boat transom or hull; includes locking nut for a tight, leak-free fit.
• Prevents water accumulation by enabling quick drainage of your boat when on trailer or at the ramp.

A unique automatic drain plug with neoprene flapper that self-bails your boat at speed. Designed for transom mounting, this Nautispeed valve opens on its own when you’re underway, draining water out and closing tight when stopped to block backflow.

• Automatically activates at approximately 30 km/h (planing speed) to release accumulated water.
• Neoprene flapper valve prevents backflow, keeping water from re-entering when the boat is stationary.
• No manual intervention needed – hands-free drainage for convenience and safety.
• Simple transom installation; fits standard drain tube openings for easy upgrade from a conventional plug.
• Ideal for small motorboats, RIBs, and speedboats that frequently get on plane and need quick self-bailing.