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 17.111.10 KP Female Y Joint is designed for splitting or combining flow within 12 mm semi-rigid polyethylene pipe systems. Featuring three push-fit female connections and manufactured from high-resistance food-grade plastic, it provides a reusable solution for marine and potable water plumbing installations.
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$ 37.32
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1-2 weeks delivery time The Osculati 17.111.12 KP in-line coupling is designed for joining two sections of 12 mm semi-rigid polyethylene pipe. Featuring a push-fit connection system and manufactured from non-toxic high-resistance food-grade plastic, it allows quick installation and provides a fully reusable connection for marine and potable water systems.
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$ 13.35
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1-2 weeks delivery time The Osculati 17.111.14 KP fitting is a 90° elbow connector combining a 12 mm push-fit female connection with a hose-tail outlet. Designed for semi-rigid polyethylene pipe systems, it enables quick integration between pipework and flexible hose installations.
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$ 26.40
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1-2 weeks delivery time The Osculati 17.111.13 KP fitting combines a 90° elbow push-fit connection for 12 mm polyethylene pipe with a 3/8" male threaded outlet. Designed for compact plumbing layouts, it enables changes in pipe direction while connecting to threaded equipment.
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$ 55.50
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1-2 weeks delivery time The Osculati 17.111.19 KP intermediate lever tap is a shut-off valve designed for 12 mm semi-rigid polyethylene pipe systems. Equipped with a manual lever control and push-fit connections, it allows quick installation and convenient flow control in potable water and marine plumbing applications.
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$ 13.32
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1-2 weeks delivery time The Osculati 17.111.35 KP Safety Clips are retaining clips designed for use with KP 12 mm quick-connect plumbing fittings. They provide additional connection security and help prevent accidental release of the push-fit coupling during operation or maintenance.
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$ 3.77
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1-2 weeks delivery time The Osculati Polyethylene Water Pipe is a flexible 12 mm plumbing pipe designed for marine freshwater systems. Manufactured for high impact resistance, chemical resistance, and flexibility, it is available in red for hot water applications and blue for cold water systems. Both versions are supplied in 100 m rolls and rated for a working pressure of 7 bar.
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$ 224.98
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1-2 weeks delivery time The John Guest Speedfit 15 mm Female-to-Female Straight Coupling is designed for connecting two sections of 15 mm pipe in watertight water installations. Using Speedfit quick-connect technology, the fitting combines stainless steel gripping teeth and an integrated O-ring seal to provide a secure, airtight, and reusable connection without special tools.
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$ 7.73
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1-2 weeks delivery time The John Guest Speedfit 15 mm 90° Female-to-Female Elbow is designed for changing pipe direction in watertight water systems. The push-fit connection combines stainless steel gripping teeth with an O-ring seal to provide a secure and reusable connection for 15 mm pipe installations.
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$ 7.17
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1-2 weeks delivery time The John Guest Speedfit 15 mm 90° Female Tee is designed for creating branch connections in 15 mm water systems. Featuring three push-fit ports, stainless steel retaining teeth, and an integrated O-ring seal, it provides a watertight and reusable connection for plumbing installations.
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$ 11.43
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1-2 weeks delivery time The John Guest Speedfit 15 mm x 1/2" Female Brass Connector combines a 15 mm push-fit pipe connection with a 1/2" female brass thread. Designed for watertight plumbing systems, it provides a secure transition between Speedfit pipework and threaded components.
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$ 14.78
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1-2 weeks delivery time The John Guest Speedfit 15 mm x 3/8" Female Brass Connector is designed for connecting 15 mm pipe to 3/8" threaded components. The fitting combines Speedfit push-fit technology, stainless steel retaining teeth, and an O-ring seal to provide a watertight and reusable connection.
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$ 13.71
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1-2 weeks delivery time The John Guest Speedfit 15 mm x 3/8" Male Brass Connector is designed to connect 15 mm pipework to components with a 3/8" female threaded port. Featuring Speedfit push-fit technology, stainless steel retaining teeth, and an integrated O-ring seal, it provides a secure, watertight, and reusable connection.
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$ 13.47
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1-2 weeks delivery time The John Guest Speedfit 15 mm x 1/2" Male Brass Connector is designed for connecting 15 mm pipe to equipment with a 1/2" female threaded connection. The fitting combines Speedfit push-fit technology with a brass threaded outlet for quick installation and long-term reliability.
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$ 12.86
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1-2 weeks delivery time The John Guest Speedfit 15 mm x 1/2" Brass Tee Connector is designed for creating branch connections between 15 mm pipework and 1/2" threaded plumbing components. The fitting combines Speedfit push-fit technology with a brass threaded branch connection for secure and reusable installation.
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$ 28.15
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1-2 weeks delivery time The John Guest Speedfit 15 mm x 1/2" Female Brass Elbow combines a 90° elbow fitting with a 1/2" female brass thread. Designed for compact plumbing installations, it enables directional pipe routing while providing a secure threaded connection.
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$ 21.22
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1-2 weeks delivery time The John Guest Speedfit 15 mm x 1/2" Male Brass Elbow is designed for connecting 15 mm pipework to 1/2" female threaded components while changing pipe direction by 90°. The fitting combines Speedfit push-fit technology with a brass threaded outlet for fast and reliable installation.
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$ 31.34
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1-2 weeks delivery time The John Guest Speedfit 15 mm Tube Insert is designed for use with 15 mm Speedfit pipe systems. The insert provides internal support to the pipe and is recommended for ensuring proper connection performance and long-term reliability in water installations.
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$ 1.58
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1-2 weeks delivery time The John Guest Speedfit Spare Silicone O-Ring is a replacement sealing component for Speedfit plumbing fittings. Manufactured from silicone, it is designed to maintain the watertight sealing performance of compatible John Guest Speedfit connectors.
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$ 1.94
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1-2 weeks delivery time The John Guest Speedfit 150 mm Pipe Curve is designed to guide and support pipe bends in plumbing installations. Supplied with a fastening screw, it provides a controlled bend radius and secure pipe positioning for Speedfit systems.
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$ 13.81
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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.