Marine plumbing fittings are essential components for maintaining reliable water flow and connections on boats. These fittings, including pipe to hose adapters, hose barbs, and thru-hull fittings, ensure secure and leak-resistant plumbing systems for onboard freshwater, fuel, and drainage applications. Marine plumbing fittings also include various pipe fitting and drain components that contribute to a well-functioning onboard system. High quality hardware, such as threaded connectors and barbed fittings, ensures secure and efficient water flow for drainage and supply lines. Regular replacement of worn or corroded fittings is essential to maintain the integrity of the plumbing system, preventing leaks and ensuring long-term reliability in marine environments.
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1-2 weeks delivery time The Osculati 17.276 Series Brass Male/Male Extension Sleeves are threaded pipe extensions designed to increase connection length in plumbing, marine, fuel, and industrial piping systems. Manufactured from corrosion-resistant brass, these fittings feature male threads on both ends and are available in multiple thread sizes from 3/8" to 1"1/2 and lengths from 60 mm to 200 mm.
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$ 9.36
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1-2 weeks delivery time The Osculati 17.278 Series Brass Male/Female Extension Sleeves are threaded extension fittings designed to increase the distance between pipe components while maintaining a secure connection. Manufactured from durable brass, these fittings feature male and female threaded ends and are available in thread sizes from 3/8" to 1" with lengths of 20 mm and 40 mm.
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$ 4.42
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1-2 weeks delivery time The Osculati 17.316 Series Brass Linear Distribution Manifolds are designed for distributing fluids through multiple branch connections from a single main line. Manufactured from solid brass with a 50 mm centre-to-centre outlet spacing, these manifolds are available with 2 to 6 outlets, featuring 1" or 1"1/4 main line connections and 1/2" branch outlets.
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$ 35.08
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1-2 weeks delivery time The Osculati 17.409 Series Brass Compression Joint 90° Male is designed for connecting copper pipes to male threaded fittings at a 90° angle. Manufactured from durable brass and fitted with a biconical brass sealing system, it provides a secure, leak-resistant connection for plumbing, marine, fuel, and industrial installations. Available for 8 mm, 10 mm, and 12 mm copper pipes with 1/4" or 3/8" male threads.
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$ 4.26
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1-2 weeks delivery time The Osculati 17.412 Series Brass Compression Joint Straight Female is designed for connecting copper pipes to female threaded fittings. Manufactured from durable brass and equipped with a biconical brass sealing system, it provides a secure, leak-resistant connection without soldering. Available for 8 mm, 10 mm, and 12 mm copper pipes with 1/4" or 3/8" female threads.
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$ 4.06
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1-2 weeks delivery time The Osculati 17.408 Series Brass Compression Joint Straight Male is designed for connecting copper pipes to male threaded fittings. Manufactured from durable brass and equipped with a biconical brass sealing system, it provides a secure, leak-resistant connection without soldering. Available for 8 mm, 10 mm, and 12 mm copper pipes with 1/4" or 3/8" male threads.
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$ 3.47
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1-2 weeks delivery time The Osculati 17.410.02 Brass Compression Tee Joint is designed for branching 10 mm copper pipe systems. Manufactured from durable brass and equipped with O-ring sealed compression connections on all ports, it provides a secure, leak-resistant connection without soldering. Suitable for marine, plumbing, fuel, pneumatic, and industrial applications.
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$ 11.54
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1-2 weeks delivery time The Osculati 17.410.20 Brass Compression Joint 90° Elbow is designed for creating right-angle connections in 10 mm copper pipe systems. Manufactured from durable brass and fitted with integrated O-ring sealing on all compression connections, it provides a secure, leak-resistant installation without soldering. Suitable for marine, plumbing, fuel, and industrial applications.
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$ 8.65
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Osculati Polypropylene Skin Fitting with Hose Adaptor – White Plastic, 15-51 mm Hose, 1/2"-2" Thread
1-2 weeks delivery time The Osculati Polypropylene Skin Fitting with Hose Adaptor is a white plastic through-hull fitting designed for above-waterline installations. Available with hose adaptor sizes from 15 mm to 51 mm and thread sizes from 1/2" to 2", it features overall lengths from 75 mm to 116 mm and flange diameters from 43 mm to 78 mm. Suitable for marine drainage, ventilation, and water transfer systems where lightweight corrosion-resistant fittings are required.
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$ 3.93
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1-2 weeks delivery time The Osculati White Plastic Fully Threaded Skin Fitting is a through-hull connector manufactured from white plastic and designed with a fully threaded body for secure installation. Available in thread sizes from 1/2" to 1-1/2", it features body diameters (A) from 21 mm to 48 mm, overall lengths (C) from 70 mm to 110 mm, and flange diameters (D) from 43 mm to 78 mm. Suitable for marine plumbing, drainage, and ventilation systems requiring a lightweight corrosion-resistant through-hull fitting.
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$ 3.93
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1-2 weeks delivery time The Osculati 90° Elbow Plastic Skin Fitting is a white plastic through-hull connector fitted with an integrated 90° hose adaptor for compact hose routing. Designed for above-waterline installations, it is available with 19 mm, 25 mm, and 38 mm hose connections, thread diameters of 33 mm or 47 mm, and overall lengths from 36 mm to 40 mm. Suitable for marine drainage, ventilation, and water transfer systems where a right-angle hose connection is required.
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$ 18.40
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1-2 weeks delivery time The Osculati 90° Elbow Plastic Skin Fitting is a white plastic through-hull connector supplied complete with a fastening ring. Designed with a 90° outlet for efficient hose routing, it is available in 3/4", 1", and 1-1/2" sizes with hose connections of 20 mm, 25 mm, and 38 mm. Threaded section diameters range from 26 mm to 48 mm, installation hole diameters from 27/30 mm to 50/51 mm, overall heights from 84 mm to 114 mm, and flange diameters from 50 mm to 72 mm.
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$ 68.46
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1-2 weeks delivery time The Osculati Nylon 90° Elbow Skin Fitting features a nylon body with a mirror-polished stainless steel visible flange and an integrated 90° hose connector. Available in 3/4", 1", and 1-1/2" sizes, it supports hose diameters of 20 mm, 25 mm, and 38 mm. The fitting features flange diameters from 45 mm to 70 mm, overall heights from 79 mm to 107.5 mm, and outlet lengths from 53 mm to 70 mm, providing a durable and visually attractive through-hull solution for marine plumbing systems.
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$ 18.45
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1-2 weeks delivery time The Osculati White Plastic Skin Fitting is a compact through-hull connector manufactured from white plastic and fitted with an integrated 90° hose adaptor. Designed with a 1" connection and 33 mm threaded diameter, it features an overall length of 42 mm and is available with either a 19 mm or 25 mm hose adaptor. Suitable for marine drainage, ventilation, and water transfer systems where a right-angle hose connection is required.
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$ 18.18
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1-2 weeks delivery time The Osculati Black Nylon Skin Fitting combines a black nylon body with a mirror-polished stainless steel visible flange for a durable and professional finish. Available with hose tail sizes from 13 mm (1/2") to 51 mm (2"), thread diameters from 22 mm (7/8") to 57 mm (2-1/4"), body lengths from 82.5 mm to 111 mm, and flange diameters from 38 mm to 75 mm. Suitable for marine plumbing, drainage, and water transfer installations requiring a corrosion-resistant through-hull fitting with an exposed stainless steel finish.
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$ 10.70
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1-2 weeks delivery time The Osculati White Nylon 90° Through Hull Drain is manufactured from white nylon and fitted with a mirror-polished stainless steel visible flange. Designed with a 90° hose connection, this fitting is available for hose sizes from 16 mm to 50 mm and thread sizes from 1/2" to 2". Depending on the version, overall dimensions range from 42 mm to 90 mm in length, with flange diameters from 37 mm to 74 mm, making it suitable for a wide variety of marine drainage and plumbing installations.
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$ 19.11
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1-2 weeks delivery time The Osculati White Nylon 90° Through Hull Drain is manufactured entirely from white nylon and features an integrated 90° hose adaptor for compact hose routing. Available with hose tail diameters from 16 mm to 50 mm and thread sizes from 1/2" to 2", this fitting offers overall lengths from 42 mm to 90 mm and flange diameters from 37 mm to 74 mm, making it suitable for a wide range of marine drainage and plumbing applications.
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$ 6.23
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1-2 weeks delivery time The Osculati Long Skin Fitting is manufactured from nylon/fiberglass and supplied with an integrated hose connector. Available for hose sizes 19/20 mm, 29/32 mm and 38 mm, with thread sizes 1" 3/8 and 2" 1/4. Depending on the version, body diameter ranges from 35 mm to 57 mm, overall length from 144 mm to 165 mm, and flange diameter from 86 mm to 95 mm. Designed as a long through-hull fitting for marine drainage and plumbing installations.
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$ 12.79
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Osculati Long Nylon/Fiberglass Skin Fitting with Hose Connector and Check Valve – 38-52 mm Hose Tail
1-2 weeks delivery time The Osculati Long Skin Fitting with Check Valve is manufactured from nylon/fiberglass and supplied with an integrated hose connector and non-return valve. Available for hose diameters of 38 mm and 52 mm with a 2" 1/4 thread, these long-body through-hull fittings feature body diameters of 57 mm, overall lengths of 122-166 mm, and flange diameters of 45-95 mm. Designed for marine drainage systems where backflow prevention is required.
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$ 23.15
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1-2 weeks delivery time The Osculati Long Skin Fitting is manufactured from nylon/fiberglass and fitted with a stainless steel visible head and integrated hose connector. Available for hose diameters of 19/20 mm, 29/32 mm and 38 mm with thread sizes 1" 3/8 and 2" 1/4. Depending on the version, body diameter ranges from 34 mm to 57 mm, overall length from 148 mm to 172 mm, and flange diameter from 86 mm to 95 mm. Designed for marine drainage and discharge systems where a polished stainless steel finish is required.
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$ 20.76
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What are the key differences between marine plumbing fittings and standard household plumbing fittings?
Marine plumbing fittings differ from standard household plumbing fittings in their materials and design, as they must withstand constant exposure to water, salt, and pressure variations. Fittings for boats, such as bronze pipe to hose adapters, 316 stainless steel connectors, and nylon hose fittings, are corrosion-resistant and designed for durability in harsh marine environments. Additionally, components like seacocks, hose clamps, and pipe plugs ensure secure and leak-free connections, preventing failures that could lead to water intrusion or system malfunctions.
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How does a pipe to hose adapter help connect different plumbing components on a boat?
A pipe to hose adapter allows seamless connection between rigid plumbing components and flexible marine hoses, ensuring compatibility across different boat plumbing fittings. Commonly made from stainless steel, brass, nylon, or Marelon, these adapters provide a secure and watertight transition for water intake, drainage, and fuel lines. Available in various sizes and thread types, they help maintain reliable plumbing connections on decks, hulls, and tanks while resisting corrosion in harsh marine environments.
How does a 90 degree elbow fitting help in routing boat plumbing lines?
A 90 degree elbow fitting is essential in boat plumbing as it allows for efficient redirection of water flow in tight spaces, preventing kinks in hoses and reducing strain on connections. Made from durable materials like plastic or NPT brass, it ensures a secure and leak free transition between pipes and hoses. With options like barbed or swivel designs, these fittings simplify installation and maintenance, making them a vital accessory for any marine plumbing system.