Boat Thru-Hull Fittings
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T-H Marine® - 1" Hole Thru-Hull Fitting for 3/4" D Hose1" Hole Thru-Hull Fitting for 3/4" D Hose by T-H Marine®. #1 Plastic Thru-Hull Supplier in the U.S.A. Their molded Thru-Hull fittings are used by more OEM boat builders than any other brand. All T-H Marine Thru-Hull Fittings are made of...Expertly crafted from premium materialsHigh quality at a budget-friendly price$2.07 - $9.24Availability Varies - Depends on Product Options - T-H Marine® - 1-3/8" Hole Thru-Hull Fitting for 1-1/8" D Hose1-3/8" Hole Thru-Hull Fitting for 1-1/8" D Hose by T-H Marine®. #1 Plastic Thru-Hull Supplier in the U.S.A. Their molded Thru-Hull fittings are used by more OEM boat builders than any other brand. All T-H Marine Thru-Hull Fittings are...№1 Plastic Thru-Hull Supplier in the U. S. AAll T-H Marine Thru-Hull Fittings are made of the highest quality virgin material to insure consistent size, extra durability and attractive appearance$3.52 - $10.42Availability Varies - Depends on Product Options
- T-H Marine® - 2" Hole 90° Elbow Thru-Hull Fitting for 1-1/2" D Hose2" Hole 90° Elbow Thru-Hull Fitting for 1-1/2" D Hose by T-H Marine®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet...№1 Plastic Thru-Hull Supplier in the U. S. AAll T-H Marine Thru-Hull Fittings are made of the highest quality virgin material to insure consistent size, extra durability and attractive appearance$13.71 - $16.04Availability Varies - Depends on Product Options
- T-H Marine® - 2" Hole Thru-Hull Fitting for 1-1/2" D Hose2" Hole Thru-Hull Fitting for 1-1/2" D Hose by T-H Marine®. #1 Plastic Thru-Hull Supplier in the U.S.A. Their molded Thru-Hull fittings are used by more OEM boat builders than any other brand. All T-H Marine Thru-Hull Fittings are made...Expertly crafted from premium materialsHigh quality at a budget-friendly price$5.20 - $20.75Availability Varies - Depends on Product Options
- T-H Marine® - Brite Plate™ 2-11/64" Hole Straight Thru-Hull Fitting for 1-1/2" D HoseBrite Plate™ 2-11/64" Hole Straight Thru-Hull Fitting for 1-1/2" D Hose by T-H Marine®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in...Expertly crafted from premium materialsHigh quality at a budget-friendly price$16.51 - $19.28In Stock - Ships within 24 hrs
- Attwood® - 1-1/2" Hole Thru-Hull Fitting for 1" D Hose1-1/2" Hole Thru-Hull Fitting for 1" D Hose by Attwood®. Cam-action neoprene plugs snap shut to form a stopper for livewells or baitwells. Clockwise turn of the handle tightens the plug, and the lever flips down to lock. Ideal for...Expertly crafted from premium materialsHigh quality at a budget-friendly price$29.03 - $29.19In Stock - Ships within 24 hrs
- Attwood® - 1-1/2" Hole Thru-Hull Fitting for 1-1/8" D Hose1-1/2" Hole Thru-Hull Fitting for 1-1/8" D Hose by Attwood®. Cam-action neoprene plugs snap shut to form a stopper for livewells or baitwells. Clockwise turn of the handle tightens the plug, and the lever flips down to lock. Ideal for...Expertly crafted from premium materialsHigh quality at a budget-friendly price$33.49 - $34.41In Stock - Ships within 24 hrs
- Attwood® - 1-1/8" Hole Thru-Hull Fitting for 3/4" D Hose1-1/8" Hole Thru-Hull Fitting for 3/4" D Hose by Attwood®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and...Expertly crafted from premium materialsHigh quality at a budget-friendly price$3.31 - $24.60In Stock - Ships within 24 hrs
- Attwood® - 1-1/8" Hole Thru-Hull Fitting for 5/8" D Hose1-1/8" Hole Thru-Hull Fitting for 5/8" D Hose by Attwood®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and...Expertly crafted from premium materialsHigh quality at a budget-friendly price$4.28 - $23.80In Stock - Ships within 24 hrs
- Attwood® - 1-3/4" Hole Thru-Hull Fitting for 1-1/4" D Hose1-3/4" Hole Thru-Hull Fitting for 1-1/4" D Hose by Attwood®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs...Expertly crafted from premium materialsHigh quality at a budget-friendly price$55.75 - $56.89In Stock - Ships in 24 to 48 hrs
- Attwood® - 1-3/8" Hole Thru-Hull Fitting for 1-1/8" to 1-1/4" Hose1-3/8" Hole Thru-Hull Fitting for 1-1/8" to 1-1/4" Hose by Attwood®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your...Expertly crafted from premium materialsHigh quality at a budget-friendly price$5.51 - $5.59In Stock - Ships within 24 hrs
- Attwood® - 2" Hole Thru-Hull Fitting for 1-1/2" D Hose2" Hole Thru-Hull Fitting for 1-1/2" D Hose by Attwood®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and...Expertly crafted from premium materialsHigh quality at a budget-friendly price$8.52 - $64.89Availability Varies - Depends on Product Options
- T-H Marine® - 1" Hole 90° Elbow Thru-Hull Fitting for 3/4" D Hose1" Hole 90° Elbow Thru-Hull Fitting for 3/4" D Hose by T-H Marine®. #1 Plastic Thru-Hull Supplier in the U.S.A. Their molded Thru-Hull fittings are used by more OEM boat builders than any other brand. All T-H Marine Thru-Hull Fittings...№1 Plastic Thru-Hull Supplier in the U. S. AStandard 90 degree fittings feature a unique finished head and a pass-around nut for easier and more attractive installation, an innovation that T-H Marine developed$2.96 - $8.09Availability Varies - Depends on Product Options
- T-H Marine® - 1-3/8" Hole 90° Elbow Thru-Hull Fitting for 1-1/8" D Hose1-3/8" Hole 90° Elbow Thru-Hull Fitting for 1-1/8" D Hose by T-H Marine®. #1 Plastic Thru-Hull Supplier in the U.S.A. Their molded Thru-Hull fittings are used by more OEM boat builders than any other brand. All T-H Marine Thru-Hull...One NutExpertly crafted from premium materials$3.18 - $13.54Availability Varies - Depends on Product Options
- Attwood® - 1" Hole 90° Elbow Thru-Hull Fitting for 3/4" D Hose1" Hole 90° Elbow Thru-Hull Fitting for 3/4" D Hose by Attwood®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your...90° thru-hulls are ideal for tight installations, such as livewell overflow drainsDesign eliminates hose kinking$7.26 - $16.15In Stock - Ships within 24 hrs
- Attwood® - 1-5/16" Hole 90° Elbow Thru-Hull Fitting for 1-1/8"-1-1/4" Hose1-5/16" Hole 90° Elbow Thru-Hull Fitting for 1-1/8"-1-1/4" Hose by Attwood®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will...90° thru-hulls are ideal for tight installations, such as livewell overflow drainsDesign eliminates hose kinking$8.92 - $12.08In Stock - Ships within 24 hrs
- Groco® - 1" Hole Combo High Speed Pickup Thru-Hull Fitting for 1" NPS Pipe with Nut1" Hole Combo High Speed Pickup Thru-Hull Fitting for 1" NPS Pipe with Nut by Groco®. Provides low pressure, low profile flow into plumbing system. This product is made of high-quality materials to serve you for years to come. Designed...Designed for increased flow compared to standard Thru Hulls and with less dragNPSM/NPTcombination thread$25.46 - $41.89Availability Varies - Depends on Product Options
- Groco® - 1-1/2" Hole Combo High Speed Pickup Thru-Hull Fitting for 1-1/2" NPS Pipe with Nut1-1/2" Hole Combo High Speed Pickup Thru-Hull Fitting for 1-1/2" NPS Pipe with Nut by Groco®. Provides low pressure, low profile flow into plumbing system. This product is made of high-quality materials to serve you for years to come....Designed for increased flow compared to standard Thru Hulls and with less dragNPSM/NPTcombination thread$64.04 - $68.82Availability Varies - Depends on Product Options
- Groco® - 1-1/4" Hole Combo High Speed Pickup Thru-Hull Fitting for 1-1/4" NPS Pipe with Nut1-1/4" Hole Combo High Speed Pickup Thru-Hull Fitting for 1-1/4" NPS Pipe with Nut by Groco®. Provides low pressure, low profile flow into plumbing system. This product is made of high-quality materials to serve you for years to come....Designed for increased flow compared to standard Thru Hulls and with less dragNPSM/NPTcombination thread$46.28 - $64.33Availability Varies - Depends on Product Options
- Groco® - 2" Hole Combo High Speed Pickup Thru-Hull Fitting for 2" NPS Pipe with Nut2" Hole Combo High Speed Pickup Thru-Hull Fitting for 2" NPS Pipe with Nut by Groco®. Provides low pressure, low profile flow into plumbing system. This product is made of high-quality materials to serve you for years to come. Designed...Designed for increased flow compared to standard Thru Hulls and with less dragNPSM/NPTcombination thread$74.84 - $93.49Availability Varies - Depends on Product Options
- Groco® - 3/4" Hole Combo High Speed Pickup Thru-Hull Fitting for 3/4" NPS Pipe with Nut3/4" Hole Combo High Speed Pickup Thru-Hull Fitting for 3/4" NPS Pipe with Nut by Groco®. Provides low pressure, low profile flow into plumbing system. This product is made of high-quality materials to serve you for years to come....Designed for increased flow compared to standard Thru Hulls and with less dragNPSM/NPTcombination thread$16.98 - $30.14Availability Varies - Depends on Product Options
- Groco® - HTH Series 1" Hole Thru-Hull Fitting for 1" D HoseHTH Series 1" Hole Thru-Hull Fitting for 1" D Hose by Groco®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs...High quality at an affordable priceExpertly made from premium materials$31.64 - $38.33In Stock - Ships in 24 to 48 hrs
- Groco® - HTH Series 1" Hole Thru-Hull Fitting for 1-1/8" D HoseHTH Series 1" Hole Thru-Hull Fitting for 1-1/8" D Hose by Groco®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your...High quality at an affordable priceExpertly made from premium materials$32.40 - $42.90In Stock - Ships in 24 to 48 hrs
- Groco® - HTH Series 1-1/2" Hole Thru-Hull Fitting for 1-1/2" D HoseHTH Series 1-1/2" Hole Thru-Hull Fitting for 1-1/2" D Hose by Groco®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet...High quality at an affordable priceExpertly made from premium materials$63.90 - $64.80Availability Varies - Depends on Product Options
- Groco® - HTH Series 1-1/4" Hole Thru-Hull Fitting for 1-1/4" D HoseHTH Series 1-1/4" Hole Thru-Hull Fitting for 1-1/4" D Hose by Groco®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet...High quality at an affordable priceExpertly made from premium materials$51.12 - $53.24In Stock - Ships in 24 to 48 hrs
- Groco® - HTH Series 1/2" Hole Thru-Hull Fitting for 1/2" D HoseHTH Series 1/2" Hole Thru-Hull Fitting for 1/2" D Hose by Groco®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your...High quality at an affordable priceExpertly made from premium materials$15.95 - $30.08In Stock - Ships in 24 to 48 hrs
- Groco® - HTH Series 2" Hole Thru-Hull Fitting for 2" D HoseHTH Series 2" Hole Thru-Hull Fitting for 2" D Hose by Groco®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs...High quality at an affordable priceExpertly made from premium materials$80.24 - $83.06Availability Varies - Depends on Product Options
- Groco® - HTH Series 3/4" Hole Thru-Hull Fitting for 3/4" D HoseHTH Series 3/4" Hole Thru-Hull Fitting for 3/4" D Hose by Groco®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your...High quality at an affordable priceExpertly made from premium materials$26.24 - $29.05In Stock - Ships in 24 to 48 hrs
- Groco® - HTH Series 3/4" Hole Thru-Hull Fitting for 5/8" D HoseHTH Series 3/4" Hole Thru-Hull Fitting for 5/8" D Hose by Groco®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your...High quality at an affordable priceExpertly made from premium materials$25.17 - $26.24In Stock - Ships in 24 to 48 hrs
- Groco® - TH Series 1" Hole Combo Thru-Hull Fitting for 1" NPS PipeTH Series 1" Hole Combo Thru-Hull Fitting for 1" NPS Pipe by Groco®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your...High quality at an affordable priceExpertly made from premium materials$22.51 - $46.28In Stock - Ships in 24 to 48 hrs
Most boats have different systems using special openings in the hull for their operation, both above and below the waterline. These include engine cooling, water ballast, plumbing, and some other systems, and each of them has to be installed properly and inspected regularly in order to avoid dangerous leaks. Particularly, thru-hull fittings and seacocks require careful attention, especially those installed under the water. It's not recommended to use nylon or even brass fittings in such places, while those made of bronze or some specific composite materials are approved by ABYC and meet strict requirements concerning tensile strength, corrosion resistance, etc.
As for boat thru-hull fittings installed above the waterline, the requirements are somewhat lower, but it doesn't mean they can be omitted. In each case, your fittings should be of high quality and have an appropriate design and diameter. A wide range of such products is offered on our virtual shelves. You can choose from straight and elbow fittings made from different materials and having threaded or barbed ends to connect a valve, pipe, or hose. Sourced from reputable brands such as Groco or T-H Marine, they offer high quality and perfect tightness.
