Top 10 Best thru hull fitting in 2026

Last Updated - 6/11/2026

🏆Best Choice

SEAFLO

SEAFLO ¾” Thru Hull Fitting Marine Boat, Polypropylene, Plastic Drain Overflow Connector, Corrosion Resistant Saltwater Safe, Transom Mount, Bilge Port Deck Outlet, 4-Year Warranty (White, 1-Pack)

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•[ SPECIFICATIONS ]: Model: SFDS1-0750-01-1 | Size: 3/4” | Height: 80.0 mm |D(mm): 50.5 | D1(mm): 19.0 | d(mm): 27.0 | d1(mm): 19.0 | di(mm): 11.5 | Material: Polypropylene | Weight: 0.033 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.

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$6.99

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YOQVQOY

YOQVQOY 2Pcs Thru Hull Fitting(3/4"), Marine Through Hull Connector Fitting for Boats, Black

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•Durable Material: Corrosion-resistant for long-lasting use in marine environments
•Universal Fit: Designed for 3/4" hoses for secure connections
•Optimal Size: Dimensions are H - 80mm, D - 50.5mm, D1 - 19mm, d - 27mm, d1 - 19mm, d2 - 11.5mm
•Easy Installation: Quick and hassle-free setup for all users
•Value Pack: Includes 2 fittings, offering more value for your money

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$9.99

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SEACHOICE

Seachoice 90-Degree Angled Thru-Hull Connector, White Finish, 0.75 in.

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•Ensures a reliable thru-hull connection
•Fits ¾ inch inside diameter hose
•Flange: 1-1/2 inch
•Max Hull Thickness: 3/4 inch
•Made of hi-impact white plastic
•Manufacturer part number 50-18131

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$11.68

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EEYAD

316 Stainless Steel Boat Thru-Hull Fitting Drain for 3/4" I.D. hose

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•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

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$15.99

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ORLANG

3/4in Thru Hull Fittings for Boats, ABS Plastic Through Hull Fitting, Thru-Hull Connector Fitting, Boat Plumbing Fittings Accessory, Thru Drain Connector for Boats, Yachts, Marine (Black)

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•【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.

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$5.87

$7.99

-27%

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SEACHOICE

Seachoice Extra Long Thru-Hull Fitting w/Broad Flange for 1-1/8 in. ID Hose, 3 in. Long Thread, White

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•Designed for installation in thick transoms or side walls
•For applications where up to 2-1/2 inches of thread are required
•Constructed of molded high-impact plastic that won't rust
•Fits 1-1/8 inch inner diameter (ID) hose
•Fits hulls up to 3-3/8 inches thick
•Not recommended for use below the waterline
•Manufacturer part number 50-18181

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$15.90

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Five Oceans

Five Oceans 1/2-Inch Thru-Hull Fittings for Boat, White Injection Molded Polypropylene, Barbed, Resist Harsh Conditions - FO1866

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•VERSATILE COMPATIBILITY: Thru-hull fittings for boats fit a 1/2-inch (13mm) hose diameter, ideal for scupper, sink drain, and bilge pump overboard discharge applications on boats
•DURABLE MATERIAL: Made from high-quality, injection-molded polypropylene plastic, designed to withstand harsh marine environments
•UV AND WEATHER RESISTANT: Thru-hull fittings are engineered to resist UV rays and weather-related aging, ensuring long-lasting performance and appearance
•EASY TO INSTALL: Designed for secure above-waterline hose connections, simplifying marine plumbing setups
•MEASUREMENTS: Hose Diameter: 1/2 inches (13mm). Thread Diameter: 13/16 inches (20mm), Maximum Thread Thickness: 1-9/16 inches (40mm). Mounting Head Diameter: 1-7/16 inches (37mm) FIVE OCEANS, 40 Years developing High-Quality Marine & Outdoor Products

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$17.00

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attwood

Attwood 3874-3 Polypropylene Durable Thru-Hull Connector Fitting, White Finish

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•Ensures a reliable thru-hull connection
•Fits 1-1/8 inch to 1-1/4 inch inside diameter hose
•Stem Length: 3-1/4 inch
•Max Hull Thickness: 1-1/4 inch
•Requires 1-3/8 inch installation hole

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$6.15

$6.69

-8%

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attwood

attwood 3873-3 Polypropylene Straight Thru-Hull Connector for Boating Plumbing Fittings, White Finish

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•Ensures a reliable thru-hull connection
•Fits ¾ inch inside diameter hose
•Stem Length: 3-1/4 inch
•Max Hull Thickness: 1-1/4 inch
•Flange diameter: 2-1/4 inch

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$7.17

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keehui

316 Stainless SteelCombo Stainless Steel Thru-Hull Fitting w/Nut & Gasket for (3/4" ID)

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•Material:This boat threaded fitting is made of heavy-duty 316 stainless steel material, which is sturdy and durable.
•Customized gasket is more convenient to install
•Flange O.D:1.9"(49mm);Thread Length:Approx: 2-5/8"
•Horse ID Size:3/4"The detail size refer to the left pictures
•Max Hull Thickness:1-1/2"

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$18.88

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Our team evaluates this data alongside genuine user feedback, merging AI analysis with human insights to provide you with real-time, highly-rated recommendations that empower your decision-making with clarity and confidence.