Boat Thru-Hull Fittings
![Boat Plumbing Thru-Hull Fittings](https://ic.boatid.com/boating-marine/pages/boat-plumbing-thru-hull-fittings/boat-plumbing-thru-hull-fittings_collage_0.jpg)
- T-H Marine®2" Hole Plastic White Thru-Hull Fitting for 1-1/2" D Hose, Packaged (TH-1502XL-DP)2" Hole Plastic White Thru-Hull Fitting for 1-1/2" D Hose, Packaged (TH-1502XL-DP) 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$11.08
- T-H Marine®1" Hole Plastic White Barbed Thru-Hull Fitting for 5/8" D Hose (TH-652-B)1" Hole Plastic White Barbed Thru-Hull Fitting for 5/8" 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$2.10
- Forespar®250 Series 1.015" Hole Plastic White Flush Head Thru-Hull Fitting for 3/4" Pipe (906002)250 Series 1.015" Hole Plastic White Flush Head Thru-Hull Fitting for 3/4" Pipe by Forespar®. 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$15.96
- Forespar®250 Series 1.635" Hole Plastic White Flush Head Thru-Hull Fitting for 1-1/4" Pipe (906006)250 Series 1.635" Hole Plastic White Flush Head Thru-Hull Fitting for 1-1/4" Pipe by Forespar®. 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$18.36
- Perko®1" Hole Bronze Extra Long Thru-Hull Fitting for 3/4" NPT Pipe (0348DP5PLB)1" Hole Bronze Extra Long Thru-Hull Fitting for 3/4" NPT Pipe by Perko®. 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...Cast BronzeFlange is machined to fit hull and grooved to retain bedding compound neck is threaded to approximately 3/8" from flange$69.55
- Perko®1-5/16" Hole Bronze Extra Long Thru-Hull Fitting for 1" NPT Pipe (0348DP6PLB)1-5/16" Hole Bronze Extra Long Thru-Hull Fitting for 1" NPT Pipe by Perko®. 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...Cast BronzeFlange is machined to fit hull and grooved to retain bedding compound neck is threaded to approximately 3/8" from flange$81.97
- Perko®1-5/16" Hole Bronze Plain Thru-Hull Fitting for 1-1/8" D Hose (035006ADPP)1-5/16" Hole Bronze Plain Thru-Hull Fitting for 1-1/8" D Hose (035006ADPP) by Perko®. 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$50.20
- Perko®1-5/8" Hole Bronze Extra Long Thru-Hull Fitting for 1-1/4" NPT Pipe (0348DP7PLB)1-5/8" Hole Bronze Extra Long Thru-Hull Fitting for 1-1/4" NPT Pipe by Perko®. 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...Cast BronzeFlange is machined to fit hull and grooved to retain bedding compound neck is threaded to approximately 3/8" from flange$177.07
- Perko®1-5/8" Hole Bronze Thru-Hull Fitting for 1-1/4" D Hose (0350007DPP)1-5/8" Hole Bronze Thru-Hull Fitting for 1-1/4" D Hose by Perko®. 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$72.70
- Perko®11/16" Hole Bronze Thru-Hull Fitting for 3/8" NPT Pipe (0322DP3PLB)11/16" Hole Bronze Thru-Hull Fitting for 3/8" NPT Pipe by Perko®. 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...Cast BronzeFlange is machined to fit hull and grooved to retain bedding compound$30.72
- Perko®2-3/8" Hole Bronze Chrome Plated Thru-Hull Fitting for 2" D Hose (0350009CHR)2-3/8" Hole Bronze Chrome Plated Thru-Hull Fitting for 2" D Hose by Perko®. 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...Cast BronzePlain or Chrome Plated$190.78
- T-H Marine®1" Hole 90° Plastic Black Elbow Thru-Hull Fitting for 3/4" D Hose, Bulk (TH-7590-B)1" Hole 90° Plastic Black Elbow Thru-Hull Fitting for 3/4" D Hose, Bulk (TH-7590-B) 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....№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
- T-H Marine®1" Hole 90° Plastic Black Elbow Two Nut Thru-Hull Fitting for 3/4" D Hose, Bulk (TH-90-B)1" Hole 90° Plastic Black Elbow Two Nut Thru-Hull Fitting for 3/4" D Hose, Bulk (TH-90-B) 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$2.72
- T-H Marine®1" Hole 90° Plastic Black Elbow Two Nut Thru-Hull Fitting for 3/4" D Hose, Packaged (TH-90-DP)1" Hole 90° Plastic Black Elbow Two Nut Thru-Hull Fitting for 3/4" D Hose, Packaged (TH-90-DP) 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$4.50
- T-H Marine®1" Hole 90° Plastic White Elbow Two Nut Thru-Hull Fitting for 3/4" D Hose, Bulk (TH-92-B)1" Hole 90° Plastic White Elbow Two Nut Thru-Hull Fitting for 3/4" D Hose, Bulk (TH-92-B) 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$2.79
- T-H Marine®1" Hole 90° Plastic White Elbow Two Nut Thru-Hull Fitting for 3/4" D Hose, Packaged (TH-92-DP)1" Hole 90° Plastic White Elbow Two Nut Thru-Hull Fitting for 3/4" D Hose, Packaged (TH-92-DP) 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$4.57
- T-H Marine®1" Hole Plastic Black Thru-Hull Fitting for 3/4" D Hose (Bulk) (TH-750XL-B)1" Hole Plastic Black Thru-Hull Fitting for 3/4" D Hose (Bulk) (TH-750XL-B) 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$2.92
- T-H Marine®1" Hole Plastic Black Thru-Hull Fitting for 5/8" D Hose (TH-650-DP)1" Hole Plastic Black Thru-Hull Fitting for 5/8" D Hose (TH-650-DP) 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$3.67
- T-H Marine®1" Hole Plastic White Thru-Hull Fitting for 1/2" D Hose (TH-502-B)1" Hole Plastic White Thru-Hull Fitting for 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$3.43
- T-H Marine®1-1/4" Hole 90° Black Washdown Fitting with Shut-Off Valve (WDV-90-DP)1-1/4" Hole 90° Black Washdown Fitting with Shut-Off Valve by T-H Marine®. Attractive, Easy to Install Wash Down Fittings. A bulkhead mounted washdown fitting that is inexpensive, functional, easy to install, and rust proof. This...Injection molded, UV stable, rust proofStandard garden hose thread outlet$29.94
- T-H Marine®1-1/4" Hole Chrome Plated Washdown Fitting w/o Shut-Off Valve (WD-1CP-DP)1-1/4" Hole Chrome Plated Washdown Fitting without Shut-Off Valve by T-H Marine®. A bulkhead mounted washdown fitting that is inexpensive, functional, easy to install, and rust proof. This injection molded, chrome plated ABS fitting is...Chrome Plated ABS flangeInjection molded, UV stable, rust proof$24.94
- T-H Marine®1-3/8" Hole 90° Chrome Plated Elbow Short Thru-Hull Fitting for 1-1/8" D Hose, Packaged (TH-1890CP-DP)1-3/8" Hole 90° Chrome Plated Elbow Short Thru-Hull Fitting for 1-1/8" D Hose, Packaged (TH-1890CP-DP) 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$10.52
- T-H Marine®1-3/8" Hole 90° Plastic Black Elbow Short Thru-Hull Fitting for 1-1/8" D Hose, Bulk (TH-1890-B)1-3/8" Hole 90° Plastic Black Elbow Short Thru-Hull Fitting for 1-1/8" D Hose, Bulk (TH-1890-B) 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...One NutExpertly crafted from premium materials$2.97
- T-H Marine®1-3/8" Hole 90° Plastic Black Elbow Thru-Hull Fitting for 1-1/8" D Hose, Bulk (TH-1290-B)1-3/8" Hole 90° Plastic Black Elbow Thru-Hull Fitting for 1-1/8" D Hose, Bulk (TH-1290-B) 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...One NutExpertly crafted from premium materials$6.67
- T-H Marine®1-3/8" Hole 90° Plastic White Elbow Thru-Hull Fitting for 1-1/8" D Hose, Packaged (TH-1892-DP)1-3/8" Hole 90° Plastic White Elbow Thru-Hull Fitting for 1-1/8" D Hose, Packaged (TH-1892-DP) 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...One NutExpertly crafted from premium materials$6.18
- T-H Marine®1-3/8" Hole Straight Plastic White Thru-Hull Fitting for 1" D Hose, Packaged (TH-1002-DP)1-3/8" Hole Straight Plastic White Thru-Hull Fitting for 1" D Hose, Packaged (TH-1002-DP) 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$6.02
- T-H Marine®2" Hole 90° Plastic Black Thru-Hull Fitting for 1-1/2" D Hose, Bulk (TH-1590-B)2" Hole 90° Plastic Black Thru-Hull Fitting for 1-1/2" D Hose, Bulk 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$13.34
- T-H Marine®2" Hole Plastic Black Thru-Hull Fitting for 1-1/2" D Hose, Bulk (TH-1500XL-B)2" Hole Plastic Black Thru-Hull Fitting for 1-1/2" D Hose, Bulk (TH-1500XL-B) 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$7.85
- T-H Marine®2" Hole Plastic Black Thru-Hull Fitting for 1-1/2" D Hose, Packaged (TH-1500XL-DP)2" Hole Plastic Black Thru-Hull Fitting for 1-1/2" D Hose, Packaged (TH-1500XL-DP) 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$11.08
- T-H Marine®90° Plastic White Elbow Over-Flow Thru-Hull Drain for 1-1/2" D Hose with Filter, Bulk (TH-1592F-B)90° Plastic White Elbow Over-Flow Thru-Hull Drain for 1-1/2" D Hose with Filter, Bulk by T-H Marine®. These thru-hull connectors are designed for 1 1/2" I.D. hose to be used as an overflow drain for baitwells. The filter stands off the...Filter prevents baitfish from passing thruStops debris from clogging drain$7.25
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.