Boat Thru-Hull Fittings
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- Sea Dog®1" Hole Polypropylene White Thru-Hull Fitting for 5/8" D Hose, Bulk (520740)1" Hole Polypropylene White Thru-Hull Fitting for 5/8" D Hose, Bulk (520740) by Sea Dog®. #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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$2.61
- Sea Dog®1-13/16" Hole Acetal White Thru-Hull Fitting for 1-1/2" D Hose, Display (520690-1)1-13/16" Hole Acetal White Thru-Hull Fitting for 1-1/2" D Hose, Display (520690-1) by Sea Dog®. 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$8.84
- SeaSense®1-1/16" Hole Nylon White Thru-Hull Fitting for 3/4" D Hose (50010234)1-1/16" Hole Nylon White Thru-Hull Fitting for 3/4" D Hose by SeaSense®. 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$6.78
- SeaSense®3/4" Hole Nylon White Thru-Hull Fitting for 1-1/8" D Hose (50010218)3/4" Hole Nylon White Thru-Hull Fitting for 1-1/8" D Hose by SeaSense®. Fits all 1/2" NPT drains. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with...Expertly crafted from premium materialsHigh quality at a budget-friendly price$7.15
- Seachoice®1-1/2" Hole 90° Plastic White Elbow Thru-Hull Fitting for 3/4" D Hose (50-18131)1-1/2" Hole 90° Plastic White Elbow Thru-Hull Fitting for 3/4" D Hose by Seachoice®. 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....Expertly crafted from premium materialsHigh quality at a budget-friendly price$48.14
- Seachoice®1-1/2" Hole Plastic Black Thru-Hull Fitting for 3/4" D Hose (50-18151)1-1/2" Hole Plastic Black Thru-Hull Fitting for 3/4" D Hose (50-18151) by Seachoice®. Per ABYC "Safety Standards for Small Craft". This product is made of high-quality materials to serve you for years to come. Designed using...Expertly crafted from premium materialsHigh quality at a budget-friendly price$39.78
- Seachoice®1-1/2" Hole Plastic Chrome Plated Thru-Hull Fitting for 3/4" D Hose (17941)1-1/2" Hole Plastic Chrome Plated Thru-Hull Fitting for 3/4" D Hose (17941) by Seachoice®. Per ABYC "Safety Standards for Small Craft". This product is made of high-quality materials to serve you for years to come. Designed using...Expertly crafted from premium materialsHigh quality at a budget-friendly price$60.18
- Seachoice®1-1/2" Hole Plastic White Thru-Hull Fitting for 1/2" D Hose with Broad Flange (50-18011)1-1/2" Hole Plastic White Thru-Hull Fitting for 1/2" D Hose with Broad Flange by Seachoice®. Per ABYC "Safety Standards for Small Craft". This product is made of high-quality materials to serve you for years to come. Designed using...Expertly crafted from premium materialsHigh quality at a budget-friendly price$38.15
- Seachoice®1-1/2" Hole Plastic White Thru-Hull Fitting for 3/4" D Hose with Broad Flange (50-18051)1-1/2" Hole Plastic White Thru-Hull Fitting for 3/4" D Hose with Broad Flange (50-18051) by Seachoice®. Per ABYC "Safety Standards for Small Craft". This product is made of high-quality materials to serve you for years to come. Designed...Expertly crafted from premium materialsHigh quality at a budget-friendly price$31.21
- Seachoice®1-1/2" Hole Plastic White Thru-Hull Fitting for 3/4" D Hose with Broad Flange (18050)1-1/2" Hole Plastic White Thru-Hull Fitting for 3/4" D Hose with Broad Flange (18050) by Seachoice®. Per ABYC "Safety Standards for Small Craft". This product is made of high-quality materials to serve you for years to come. Designed...Expertly crafted from premium materialsHigh quality at a budget-friendly price$24.17
- Seachoice®1-1/4" Hole Stainless Steel Mega-Flow Dripless Thru-Hull Fitting for 3/4" D Hose (50-18601)1-1/4" Hole Stainless Steel Mega-Flow Dripless Thru-Hull Fitting for 3/4" D Hose by Seachoice®. 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...Drip collar on the face prevents hull streakingPassed side load test: max. 551 lb (250 kg)$53.41
- Seachoice®1-1/4" Hole Stainless Steel Mega-Flow Dripless Thru-Hull Fitting for 5/8" D Hose (50-18591)1-1/4" Hole Stainless Steel Mega-Flow Dripless Thru-Hull Fitting for 5/8" D Hose by Seachoice®. 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...Drip collar on the face prevents hull streakingPassed side load test: max. 551 lb (250 kg)$51.01
- Seachoice®1-3/4" Hole Plastic White Thru-Hull Fitting for 3/4" D Hose (18161)1-3/4" Hole Plastic White Thru-Hull Fitting for 3/4" D Hose by Seachoice®. 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$48.14
- Seachoice®1-5/8" Hole 90° Plastic White Elbow Thru-Hull Fitting for 3/4" D Hose (18061)1-5/8" Hole 90° Plastic White Elbow Thru-Hull Fitting for 3/4" D Hose by Seachoice®. 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....Expertly crafted from premium materialsHigh quality at a budget-friendly price$50.29
- Seachoice®1-5/8" Hole Plastic White Thru-Hull Fitting for 5/8" D Hose with Broad Flange (50-18031)1-5/8" Hole Plastic White Thru-Hull Fitting for 5/8" D Hose with Broad Flange (50-18031) by Seachoice®. Per ABYC "Safety Standards for Small Craft". This product is made of high-quality materials to serve you for years to come. Designed...Expertly crafted from premium materialsHigh quality at a budget-friendly price$29.78
- Seachoice®1-5/8" Hole Plastic White Thru-Hull Fitting for 5/8" D Hose with Broad Flange (18030)1-5/8" Hole Plastic White Thru-Hull Fitting for 5/8" D Hose with Broad Flange (18030) by Seachoice®. Per ABYC "Safety Standards for Small Craft". This product is made of high-quality materials to serve you for years to come. Designed...Expertly crafted from premium materialsHigh quality at a budget-friendly price$22.24
- Seachoice®1-7/8" Hole 90° Plastic White Elbow Thru-Hull Fitting for 1-1/8" D Hose (50-18141)1-7/8" Hole 90° Plastic White Elbow Thru-Hull Fitting for 1-1/8" D Hose by Seachoice®. 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$87.92
- Seachoice®1-7/8" Hole 90° Polypropylene Black Covered Elbow Thru-Hull Fitting for 1" D Hose (50-18551)1-7/8" Hole 90° Polypropylene Black Covered Elbow Thru-Hull Fitting for 1" D Hose by Seachoice®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with...Expertly crafted from premium materialsHigh quality at a budget-friendly price$98.12
- Seachoice®1-7/8" Hole 90° Polypropylene Black Covered Elbow Thru-Hull Fitting for 1-1/8" D Hose (50-18561)1-7/8" Hole 90° Polypropylene Black Covered Elbow Thru-Hull Fitting for 1-1/8" D Hose by Seachoice®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with...Expertly crafted from premium materialsHigh quality at a budget-friendly price$23.93
- Seachoice®1-7/8" Hole 90° Polypropylene Black Covered Elbow Thru-Hull Fitting for 3/4" D Hose (50-18541)1-7/8" Hole 90° Polypropylene Black Covered Elbow Thru-Hull Fitting for 3/4" D Hose by Seachoice®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with...Expertly crafted from premium materialsHigh quality at a budget-friendly price$81.50
- Seachoice®1-7/8" Hole 90° Polypropylene Black Covered Elbow Thru-Hull Fitting for 5/8" D Hose (50-18531)1-7/8" Hole 90° Polypropylene Black Covered Elbow Thru-Hull Fitting for 5/8" D Hose by Seachoice®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with...Expertly crafted from premium materialsHigh quality at a budget-friendly price$83.84
- Seachoice®1-7/8" Hole Plastic Black Thru-Hull Fitting for 1-1/8" D Hose (50-18171)1-7/8" Hole Plastic Black Thru-Hull Fitting for 1-1/8" D Hose (50-18171) by Seachoice®. Per ABYC "Safety Standards for Small Craft". This product is made of high-quality materials to serve you for years to come. Designed using...Expertly crafted from premium materialsHigh quality at a budget-friendly price$58.14
- Seachoice®1-7/8" Hole Plastic Chrome Plated Thru-Hull Fitting for 1-1/8" D Hose (17961)1-7/8" Hole Plastic Chrome Plated Thru-Hull Fitting for 1-1/8" D Hose (17961) by Seachoice®. Per ABYC "Safety Standards for Small Craft". This product is made of high-quality materials to serve you for years to come. Designed using...Expertly crafted from premium materialsHigh quality at a budget-friendly price$83.64
- Seachoice®1-7/8" Hole Plastic White Thru-Hull Fitting for 1" D Hose with Broad Flange (50-18071)1-7/8" Hole Plastic White Thru-Hull Fitting for 1" D Hose with Broad Flange by Seachoice®. Per ABYC "Safety Standards for Small Craft". This product is made of high-quality materials to serve you for years to come. Designed using...Expertly crafted from premium materialsHigh quality at a budget-friendly price$58.14
- Seachoice®1-7/8" Hole Plastic White Thru-Hull Fitting for 1-1/8" D Hose (18181)1-7/8" Hole Plastic White Thru-Hull Fitting for 1-1/8" D Hose (18181) by Seachoice®. Per ABYC "Safety Standards for Small Craft". This product is made of high-quality materials to serve you for years to come. Designed using...Expertly crafted from premium materialsHigh quality at a budget-friendly price$65.99
- Seachoice®1-7/8" Hole Plastic White Thru-Hull Fitting for 1-1/8" D Hose with Broad Flange (50-18091)1-7/8" Hole Plastic White Thru-Hull Fitting for 1-1/8" D Hose with Broad Flange (50-18091) by Seachoice®. Per ABYC "Safety Standards for Small Craft". This product is made of high-quality materials to serve you for years to come....Expertly crafted from premium materialsHigh quality at a budget-friendly price$52.43
- Seachoice®1-7/8" Hole Plastic White Thru-Hull Fitting for 1-1/8" D Hose with Broad Flange (18090)1-7/8" Hole Plastic White Thru-Hull Fitting for 1-1/8" D Hose with Broad Flange (18090) by Seachoice®. Per ABYC "Safety Standards for Small Craft". This product is made of high-quality materials to serve you for years to come. Designed...Expertly crafted from premium materialsHigh quality at a budget-friendly price$48.14
- Seachoice®1-7/8" Hole Polypropylene Black Covered Thru-Hull Fitting for 1" D Hose (50-18451)1-7/8" Hole Polypropylene Black Covered Thru-Hull Fitting for 1" D Hose by Seachoice®. 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....Expertly crafted from premium materialsHigh quality at a budget-friendly price$82.62
- Seachoice®1-7/8" Hole Polypropylene Black Covered Thru-Hull Fitting for 1-1/8" D Hose (50-18461)1-7/8" Hole Polypropylene Black Covered Thru-Hull Fitting for 1-1/8" D Hose by Seachoice®. 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$83.84
- Seachoice®1-7/8" Hole Polypropylene Black Covered Thru-Hull Fitting for 3/4" D Hose (50-18441)1-7/8" Hole Polypropylene Black Covered Thru-Hull Fitting for 3/4" D Hose by Seachoice®. 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$76.70
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.