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.
|
1-2 weeks delivery time The Osculati PP T-Connector is manufactured from polypropylene (PP) and designed for branching water lines in marine plumbing systems. Available in diameters from Ø10 mm to Ø25 mm, these hose connectors provide a simple and reliable solution for creating T-junctions in freshwater, drainage, and general onboard water distribution systems.
|
$ 10.89
Diameter, mm:
| ||
|
1-2 weeks delivery time The Osculati Nylon Y-Connector is designed for splitting or combining water flow in marine plumbing systems. Manufactured from nylon, it provides a reliable three-way hose connection for water hoses with diameters from Ø8 mm to Ø16 mm. Available in multiple sizes, the fitting is suitable for freshwater distribution, drainage, and general onboard plumbing applications.
|
$ 81.58
Diameter, mm:
| ||
|
1-2 weeks delivery time The Osculati Nylon Thru-Hull Hose Connector is manufactured from white nylon and designed for through-hull water transfer and drainage applications. Suitable for 19 mm and 20 mm hoses, the fitting features a through-hull mounting design with a 127.4 mm overall length and a Ø20/25.7 mm threaded section for secure installation in marine plumbing systems.
|
$ 5.37
-
+
| ||
|
1-2 weeks delivery time The Osculati High Strength Thermopolymer Bulkhead Hose Fitting is a 90° through-bulkhead connector designed for marine plumbing and fluid transfer systems. Manufactured from high-strength thermopolymer, it provides a secure hose connection through bulkheads, tanks, lockers, and compartments. Available in four sizes with thread options from 1/2" to 1" and hose tail diameters from 11/13 mm to 26/29 mm, it includes a retaining nut for reliable installation.
|
$ 5.93
Diameter, mm:
| ||
|
1-2 weeks delivery time The Osculati Universal Hose Adapter Reducer is a multi-step hose connector designed to accommodate a wide range of hose diameters in marine plumbing, bilge, drainage, ventilation, and water transfer systems. Available in two versions covering hose sizes from 13 mm to 58 mm, the adapter can be trimmed to the required diameter for a secure and customized hose connection.
|
$ 26.11
Diameter, mm:
| ||
|
1-2 weeks delivery time The Osculati High Strength Thermopolymer T-Joint Fitting is designed for combining two drainage lines into a single skin fitting connection. Manufactured from durable high-strength thermopolymer, it features female threaded connections and is available in four configurations with thread sizes from 1/2" to 1". The fitting is recommended for installations where two outlets must be drained through a single hull outlet.
|
$ 8.88
Size:
| ||
|
1-2 weeks delivery time The Osculati Diesel Fuel Line Non-Return Check Valve is an inline one-way valve designed for installation in diesel fuel systems. It prevents fuel backflow and helps maintain fuel supply within the pipeline. Available for 8 mm, 10 mm, and 12 mm fuel hoses, it is suitable for marine diesel fuel installations and fuel transfer circuits.
|
$ 15.17
Diameter, mm:
| ||
|
1-2 weeks delivery time The Osculati Polypropylene Check Valve is a multipurpose one-way valve designed to allow water flow in a single direction only. Manufactured from polypropylene and fitted with an internal rubber flapper, it features stepped hose-tail connections that can accommodate multiple hose diameters. Available in two size ranges covering hose sizes from 13 mm to 38 mm.
|
$ 9.96
Diameter, mm:
| ||
|
1-2 weeks delivery time The Osculati Multi-Size Hose Connector with Integrated Check Valve is a versatile one-way connector designed for marine plumbing and water transfer systems. Featuring a quick connection system and integrated check valve, it allows flow in a single direction while simplifying installation and maintenance. Available in two stepped hose-tail versions covering hose diameters from 13 mm to 38 mm.
|
$ 14.80
Diameter, mm:
| ||
|
1-2 weeks delivery time The Whale In-Line Check Valve is a universal non-return valve designed to prevent reverse flow in marine plumbing systems. Featuring a polypropylene body and nitrile duckbill valve, it allows liquid flow in one direction only. Available in two stepped hose-tail versions for 19/25 mm and 25/38 mm hose connections, it is suitable for drainage, bilge, and wastewater applications.
|
$ 33.26
Diameter, mm:
| ||
|
1-2 weeks delivery time The Osculati Brass Check Valve is a non-return valve designed for installation in fluid pipework to prevent backflow. Manufactured from brass, it is suitable for plumbing and onboard fluid transfer systems where one-way flow control is required. Available with female threaded connections from 1/2" to 1-1/2".
|
$ 9.72
Size:
| ||
|
1-2 weeks delivery time The Osculati 17.111.01 KP quick coupling is a straight female-to-female connector designed for 12 mm semi-rigid polyethylene pipe systems. Manufactured from non-toxic high-resistance food-grade plastic, it features an instant snap-in connection system that allows fast installation by simply pushing the tube into the fitting and securing it with a fastening clip. Fully reusable and suitable for potable water and marine plumbing applications.
|
$ 31.27
-
+
| ||
|
1-2 weeks delivery time The Osculati 17.111.02 KP quick coupling is a 90-degree female-to-female elbow fitting for 12 mm semi-rigid polyethylene pipe. Designed for compact plumbing installations, it provides a quick push-fit connection while allowing pipe routing around corners without additional adapters. Manufactured from non-toxic high-resistance food-grade plastic and fully reusable.
|
$ 31.27
-
+
| ||
|
1-2 weeks delivery time The Osculati 17.111.03 KP quick coupling is a 90-degree female tee fitting designed for branching 12 mm semi-rigid polyethylene pipe systems. Featuring a push-fit connection system and food-grade plastic construction, it allows quick creation of secondary plumbing lines while maintaining a secure and reusable connection.
|
$ 36.44
-
+
| ||
|
1-2 weeks delivery time The Osculati 17.111.04 KP fitting combines a 12 mm quick-connect female coupling with a 3/8" female threaded connection. Designed for plumbing systems using semi-rigid polyethylene pipe, it enables fast integration of threaded components while maintaining the convenience of a push-fit installation system.
|
$ 38.57
-
+
| ||
|
1-2 weeks delivery time The Osculati 17.111.05 KP fitting combines a 12 mm quick-connect female coupling with a 1/2" female threaded connection. Designed for potable water and marine plumbing systems, it provides a reusable push-fit connection for rapid installation and maintenance.
|
$ 41.99
-
+
| ||
|
1-2 weeks delivery time The Osculati 17.111.06 KP quick coupling combines a 12 mm push-fit female connection with a 3/8" male threaded fitting. Designed for semi-rigid polyethylene pipe systems, it provides rapid installation and easy integration with threaded plumbing components. Manufactured from non-toxic high-resistance food-grade plastic and fully reusable.
|
$ 25.24
-
+
| ||
|
1-2 weeks delivery time The Osculati 17.111.07 KP quick coupling features a 12 mm push-fit female connection and a 1/2" male threaded fitting. Designed for marine plumbing and potable water systems, it enables rapid installation of semi-rigid polyethylene pipe while providing a secure threaded connection.
|
$ 26.57
-
+
| ||
|
1-2 weeks delivery time The Osculati 17.111.08 KP cylinder joint is designed for connecting 12 mm semi-rigid polyethylene pipe to a 3/8" male threaded connection. Manufactured from high-resistance food-grade plastic with a brass threaded insert, it provides a reusable quick-fit solution for potable water and marine plumbing systems.
|
$ 49.47
-
+
| ||
|
1-2 weeks delivery time The Osculati 17.111.09 KP cylinder joint combines a 12 mm push-fit connection with a 1/2" male threaded fitting. Designed for potable water and marine plumbing systems, it provides fast installation, easy maintenance, and full reusability.
|
$ 59.37
-
+
| ||
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.
Contuct us to shop best fittings for your boat.
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.