Upgrading your boat’s plumbing system is an exercise in functionality, durability, and aesthetics. The right parts can make a huge difference in the quality of your boating experience, but finding the right parts for your boat can be a challenge. To help you make sense of the vast selection of parts available, we turned to boating enthusiasts who have installed and used the parts themselves to learn what’s worth buying and what’s not.
Here are the best boat plumbing fittings you can buy.
Our Editor’s Best Boat Plumbing Fittings Reviews
- [ SPECIFICATIONS ]: Model: SFDS1-1125-01-1 | Size: 1⅛” | Height: 94.0 mm |D(mm): 64.0 | D1(mm): 23.7 | d(mm): 31.8 | d1(mm): 28.5 | di(mm): 25.6 | Material: Polypropylene | Weight: 0.065 kg | Color: White | 1-Pack
- [ ENGINEERED FOR MARINE PERFORMANCE ]: Designed for overflow drains, bilge outlets, and livewell plumbing, this fitting is ideal for marine applications where corrosion resistance and above-waterline sealing are critical to performance and safety.
- [ DURABLE POLYPROPYLENE CONSTRUCTION ]: Crafted from injection-molded polypropylene, this fitting resists damage from UV rays, saltwater, oil, and fuel, ensuring years of reliable use in demanding marine environments with zero metal corrosion risk.
- [ EASY INSTALLATION WITH SECURE SEALING ]: The broad mounting flange and precision-molded threads make it simple to install using standard marine tools, providing a secure, vibration-resistant seal with no need for complex equipment or adhesives.
- [ COMPLIES WITH ABYC STANDARDS ]: Meets ABYC safety guidelines for small craft fittings. Perfect for use in non-submerged plumbing systems on boats, kayaks, and RVs where safety, compliance, and durability are essential.
- Hose size: 1 1/2 inch I.D
- Stem length: 3 1/2 inch
- Max. Hull thickness: 1 1/4 inch
- Flange diameter: 3 inch
- Installation hole size: 1 7/8" to 2"
- Ideal Application: Perfect for use as a deck floor drain or vent port for bilge pumps, ensuring efficient water management. Please make sure to check the size before purchasing to ensure it fits your boat’s plumbing system properly.
- Versatile Usage: Suitable for a wide range of vehicles, including boats, yachts, trucks, tractors, and more.
- Quality: Made from premium PVC material, this 90 Degree Thru Hull Connector is designed to withstand tough environmental conditions.
- Connector Type: 90 Degree Thru Hull Fitting Connector, compatible with 3/4-inch fittings bilge pump drain, available in black color.
- Simple Installation: Designed for quick and easy installation, making it a convenient solution for boat plumbing needs.
- -High Quality: Heavy duty 316 grade stainless steel construction ensures its strength and durability.
- -Scope of Application: High reliability, widely used in boats, yachts, marine, cars,trailer, etc.
- -Good Performance: Surface with mirror polishing finish, strong corrosion resistance in the saltwater environment.
- -Installation: A compact size allowing installation near corners and in confined areas.
- Package Included:
1 x Boat Half Thread Thru Hull Fitting
1x Rubber gasket of matching size
- Material: Marine Grade 316 Stainless Steel Solid metal slab, Heavy Duty ,very strong, durable
- Customized gasket is more convenient to install
- Flange O.D:2-1/2"(62.5mm);Thread Length: APPROX.1-3/4"(44.5MM)Barb Length: 1-1/8"
- Horse ID Size:1-1/4" The detail size refer to the left pictures
- Thread O.D：Approx 1-5/8"
- -High Quality: Heavy duty 316 grade stainless steel construction ensures its strength and durability.
- -Scope of Application: High reliability, widely used in boats, yachts, marine, cars,trailer, etc.
- -Good Performance: Surface with mirror polishing finish, strong corrosion resistance in the saltwater environment.
- -Installation: A compact size allowing installation near corners and in confined areas.
- Package Included:
1 x Boat Half Thread Thru Hull Fitting
1x Rubber gasket of matching size
- 【HIGH QUALITY MATERIALS】Thru hull fitting is made of premium ABS material,sturdy and not easy to break,cannot rust and anti-UV,lightweight and impact-resistant.Thru hull fittings for boats 3/4 are smooth surface and strict tested to ensure the best quality,maximum corrosion resistance and durability in the saltwater environment,sunlight and other harsh marine conditions.
- 【PERFECTLY COMPATIBLE】: Through hull fittings for boats can be used in various marine systems, including water intakes, bilge pumps, livewell installations, and more. Please select the appropriate Thru-hull fitting size for your boat to ensure a correct and secure connection, prevent leaks and maintain the integrity of the hull.
- 【ESSENTIAL TOOL】Thru hull fittings are critical connections to ensure the safe and reliable operation of your ship's piping system. Its presence plays a key role in keeping functions running smoothly and preventing potential problems.It can directly replace old or damaged through-hull fittings.
- 【EASY TO INSTALL AND REPLACE】These boat thru hull fittings are easy to install and replace, there is no need for complicated tools.Replace damaged parts directly with these accessories and experience worry-free installation and removal, providing a convenient solution for boat maintenance that is easy for anyone to set up and use.
- 【WIDE APPLICATION】Thru drain connector is ideal for drainage holes, sink drainage and bilge pump overboard drains,their multipurpose functionality adds convenience to your boating experience, making it an essential component of your boats.In addition,through hull fitting tool also suitable for caravans / RVs, trucks and kitche etc.
- 【PERFECTLY COMPATIBLE】: Through hull fittings for boats can be used in various marine systems, including water intakes, bilge pumps, livewell installations, and more. Note:Please confirm the size information before buying to ensure a correct and secure connection, prevent leaks and maintain the integrity of the hull
- 【HIGH QUALITY MATERIALS】3/4 thru hull fitting 90 is made of premium ABS material,sturdy and not easy to break,cannot rust and anti-UV,lightweight and impact-resistant.Thru hull fittings for boats 3/4 are smooth surface and strict tested to ensure the best quality,maximum corrosion resistance and durability in the saltwater environment,sunlight and other harsh marine conditions
- 【ESSENTIAL TOOL】Thru hull fittings are critical connections to ensure the safe and reliable operation of your ship's piping system. Its presence plays a key role in keeping functions running smoothly and preventing potential problems.It can directly replace old or damaged through-hull fittings
- 【EASY TO INSTALL AND REPLACE】These boat thru hull fittings are easy to install and replace, there is no need for complicated tools.Replace damaged parts directly with these accessories and experience worry-free installation and removal, providing a convenient solution for boat maintenance that is easy for anyone to set up and use
- 【WIDE APPLICATION】Thru drain connector is ideal for drainage holes, sink drainage and bilge pump overboard drains,their multipurpose functionality adds convenience to your boating experience, making it an essential component of your boats.In addition,3/4 through hull fitting 90 degree also suitable for caravans / RVs, trucks and kitche etc
- Stainless steel thru-hull with straight barb for hose
- A good choice for scuppers, sink drains and bilge overboard drains
- Excellent seawater corrosion-resistant, and heavy-duty
- Easy to install
- 【PERFECTLY COMPATIBLE】: Through hull fittings for boats can be used in various marine systems, including water intakes, bilge pumps, livewell installations, and more. Note:Please confirm the size information before buying to ensure a correct and secure connection, prevent leaks and maintain the integrity of the hull.Not recommended for use below the waterline
- 【316 STAINLESS STEEL】3/4 thru hull fitting is made of premium 316 stainless steel,sturdy and not to break,cannot rust and anti-UV, and impact-resistant.Through hull fitting is smooth surface and strict tested to ensure the best quality,maximum corrosion resistance and durability in the saltwater environment,sunlight and other harsh marine conditions
- 【ESSENTIAL TOOL】Thru hull fittings are critical connections to ensure the safe and reliable operation of your ship's piping system. Its presence plays a key role in keeping functions running smoothly and preventing potential problems.It can directly replace old or damaged through-hull fittings
- 【EASY TO INSTALL AND REPLACE】These boat thru hull fittings are easy to install and replace, there is no need for complicated tools.Replace damaged parts directly with these accessories and experience worry-free installation and removal, providing a convenient solution for boat maintenance that is easy for anyone to set up and use
- 【WIDE APPLICATION】Thru drain connector is ideal for drainage holes, sink drainage and bilge pump overboard drains,their multipurpose functionality adds convenience to your boating experience, making it an essential component of your boats.In addition,bilge pump thru hull fitting 3/4 also suitable for caravans / RVs, trucks and kitche etc
Best Boat Plumbing Fittings Buying Guide
Before choosing the best boat plumbing fittings you should consider following options:
1. Types of pipe fittings: Every plumber has a favorite pipe fitting, and there are many kinds to choose from. Some of the more common ones include:
a. Ball valves: This is a great option to use in your plumbing system if you want something that is easy to operate and is durable. Ball valves can be found in a range of styles and materials.
b. Branch connectors: These are used to connect two pieces of pipe together. They come in a wide range of sizes and are designed to make the connection as tight as possible.
c. Caps: Caps are used to close off one end of a pipe, so that liquids can’t flow through it. They are usually made from rubber or plastic.
d. Cross connectors: These fittings are used to connect two parallel pipes together. They are often used in water heating systems and are widely available.
e. Elbows: One of the most widely used fittings, elbows can be found in a range of sizes and materials. They can help to change the direction of the flow in a pipe.
f. Strainers: These are used to catch debris before it reaches a pump or filter. They come in different sizes and are easy to install.
g. T connectors: These fittings are used to split a single pipe into two parallel pipes. They are often used in drain lines to combine two drains with the same diameter.h. Tees: These fittings are used to split a single pipe into two pipes of different diameters. They are widely used in water heating systems.
2. Types of pipe: You will also need to choose the type of pipe that you want to use in your system. There are a number of different types available and they are made from a range of materials.
Pipe that is made from copper is a popular option because it is easy to work with and is highly resistant to corrosion. PVC pipe is also widely used because it is cheap and easy to install.
You may also decide to use steel pipe in your plumbing system if you want something that is durable and easy to work with.
3. Pipe fittings compatibility: You will need to make sure that the fittings you choose are compatible with the type of pipe you want to install.
For example, you can’t use ball valves on pipes made from PVC because they will break from the stress. It’s important to do your research before you buy to make sure that everything will work together.
4. Cost: One of the most important factors to take into account when choosing fittings is cost. You will need to make sure that the fittings you choose are affordable.
Some types of pipe are more expensive than others, and the fittings can vary in price. You will need to make sure that you buy something that is within your budget.
What else you should know about boat plumbing fittings
1. What are the most common boat plumbing fittings?
The most common boat plumbing fittings are threaded, barb, and compression fittings.
2. What are the different types of boat plumbing fittings?
There are many different types of boat plumbing fittings, including those for fresh water, waste water, fuel, and more. Each type of fitting has a different purpose, and some are more specialized than others.
3. What are the benefits of using boat plumbing fittings?
The benefits of using boat plumbing fittings include a reduction in installation time, improved accuracy, and a cleaner finished product.
4. How can I ensure a proper fit for my boat plumbing fittings?
There are a few ways to ensure a proper fit for boat plumbing fittings. First, make sure that the fittings are the correct size for the pipe. Second, use a pipe wrench or similar tool to tighten the fitting onto the pipe. Finally, use Teflon tape or similar material to seal the fitting and prevent leaks.
5. What are some tips for installation of boat plumbing fittings?
Boat plumbing fittings can be a bit tricky to install, but here are a few tips to help make the process a bit easier:
– Make sure all the fittings are the correct size for your pipes.
– If possible, dry fit the fittings before you start applying any glue or sealant. This will help you to identify any potential issues before you get started.
– When you are ready to glue the fittings in place, be sure to use a good quality marine grade sealant.
– Follow the manufacturer’s instructions carefully and allow the sealant to cure fully before using the plumbing system.
Conclusion
On the market, there are numerous best boat plumbing fittings. Hopefully, the list of the top ten best boat plumbing fittings will save you time researching and deciding on the best one for you.