Boat Thru-Hull Fittings
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- Groco®TH Series 3/4" Hole Bronze Combo Thru-Hull Fitting for 3/4" NPS Pipe (TH-750-W)TH Series 3/4" Hole Bronze Combo Thru-Hull Fitting for 3/4" NPS Pipe (TH-750-W) 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...NPSM/NPT combination threadC83600 Bronze$19.03
- Groco®TH Series 3/4" Hole Stainless Steel Combo Thru-Hull Fitting for 3/4" NPS Pipe (TH-750-WS)TH Series 3/4" Hole Stainless Steel Combo Thru-Hull Fitting for 3/4" NPS Pipe (TH-750-WS) 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...NPSM/NPT combination thread#316 Stainless Steel$19.67
- Groco®TH Series 4" Hole Bronze Combo Thru-Hull Fitting for 4" NPS Pipe (TH-4000-W)TH Series 4" Hole Bronze Combo Thru-Hull Fitting for 4" 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...NPSM/NPT combination threadC84400 Bronze$1,050.19
- Johnson Pump®3/4" Hole 90° Polypropylene White Elbow Thru-Hull Fitting for 3/4" D Hose (75035-00)3/4" Hole 90° Polypropylene White Elbow Thru-Hull Fitting for 3/4" D Hose by Johnson Pump®. 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$11.13
- Johnson Pump®Thru-Hull Nut (54033PK)Thru-Hull Nut by Johnson Pump®. 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 deliver great quality at...Expertly crafted from premium materialsHigh quality at a budget-friendly price$6.21
- Perko®1" Hole Plastic White Broad Flange Thru-Hull Fitting for 3/4" D Hose (0328DP5)1" Hole Plastic White Broad Flange Thru-Hull Fitting for 3/4" 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...Molded White or Black PolymerBroad Flange$4.17
- Perko®1-5/16" Hole Plastic White Broad Flange Thru-Hull Fitting for 1" D Hose (0328DP6)1-5/16" Hole Plastic White Broad Flange Thru-Hull Fitting for 1" 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...Molded White or Black PolymerBroad Flange$7.10
- Perko®1-5/16" Hole Plastic White Broad Flange Thru-Hull Fitting for 1-1/8" D Hose (0328DP6A)1-5/16" Hole Plastic White Broad Flange Thru-Hull Fitting for 1-1/8" 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....Molded White or Black PolymerBroad Flange$6.80
- Perko®1/2" Hole Chrome Plated Bronze Water Inlet Fitting for 1/2" NPT Pipe (0499DP0CHR)1/2" Hole Chrome Plated Bronze Water Inlet Fitting for 1/2" 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...Chrome Plated BronzeStandard Female Swivel Hose Connector$117.87
- Perko®13/16" Hole Plastic White Broad Flange Thru-Hull Fitting for 1-1/2" D Hose (0328DP8)13/16" Hole Plastic White Broad Flange Thru-Hull Fitting for 1-1/2" 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....Molded White or Black PolymerBroad Flange$11.08
- Perko®13/16" Hole Plastic White Broad Flange Thru-Hull Fitting for 1/2" D Hose (0328DP4)13/16" Hole Plastic White Broad Flange Thru-Hull Fitting for 1/2" 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...Molded White or Black PolymerBroad Flange$4.61
- Perko®13/16" Hole Plastic White Broad Flange Thru-Hull Fitting for 5/8" D Hose (0328DP4A)13/16" Hole Plastic White Broad Flange Thru-Hull Fitting for 5/8" 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...Molded White or Black PolymerBroad Flange$5.66
- Whitecap®1-1/4" Hole Stainless Steel/Plastic Thru-Hull Fitting for 1-1/8" D Hose (S-3803C)1-1/4" Hole Stainless Steel/Plastic Thru-Hull Fitting for 1-1/8" D Hose by Whitecap®. 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$13.95
- Whitecap®1-1/4" Hole Stainless Steel/Plastic Thru-Hull Fitting for 3/4" D Hose (S-3801C)1-1/4" Hole Stainless Steel/Plastic Thru-Hull Fitting for 3/4" D Hose (S-3801C) by Whitecap®. 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$14.84
- Jabsco®1-1/2" Hole Flush Mount Thru-Hull Fitting (31911-0000)1-1/2" Hole Flush Mount Thru-Hull Fitting by Jabsco®. 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...Water flow available with an easy twist of the fittingHighly polished marine stainless steel$155.09
- Sea Dog®1" Hole Polypropylene White Thru-Hull Fitting for 3/4" D Hose, Bulk (520750)1" Hole Polypropylene White Thru-Hull Fitting for 3/4" D Hose, Bulk (520750) 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 in...Expertly crafted from premium materialsHigh quality at a budget-friendly price$3.17
- Sea Dog®1" Hole Polypropylene White Thru-Hull Fitting for 3/4" D Hose, Display (520750-1)1" Hole Polypropylene White Thru-Hull Fitting for 3/4" D Hose, Display (520750-1) 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$5.39
- Sea Dog®1" Hole Polypropylene White Thru-Hull Fitting for 5/8" D Hose, Display (520740-1)1" Hole Polypropylene White Thru-Hull Fitting for 5/8" D Hose, Display (520740-1) 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$5.39
- Sea Dog®1-13/16" Hole Polypropylene White Thru-Hull Fitting for 1-1/2" D Hose, Bulk (520790)1-13/16" Hole Polypropylene White Thru-Hull Fitting for 1-1/2" D Hose, Bulk (520790) 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$8.01
- Sea Dog®1-13/16" Hole Polypropylene White Thru-Hull Fitting for 1-1/2" D Hose, Display (520790-1)1-13/16" Hole Polypropylene White Thru-Hull Fitting for 1-1/2" D Hose, Display (520790-1) 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$10.17
- Sea Dog®1-3/8" Hole Polypropylene White Thru-Hull Fitting for 1-1/8" - 1-1/4" Hose, Bulk (520770)1-3/8" Hole Polypropylene White Thru-Hull Fitting for 1-1/8" - 1-1/4" Hose, Bulk (520770) 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$5.90
- Sea Dog®1-3/8" Hole Polypropylene White Thru-Hull Fitting for 1-1/8" - 1-1/4" Hose, Display (520770-1)1-3/8" Hole Polypropylene White Thru-Hull Fitting for 1-1/8" - 1-1/4" Hose, Display (520770-1) 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$8.09
- T-H Marine®1-3/8" Hole 90° Plastic Black Barbed Elbow Thru-Hull Fitting for 1-1/8" D Hose (TH-1290T-DP)1-3/8" Hole 90° Plastic Black Barbed Elbow Thru-Hull Fitting for 1-1/8" 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$10.30
- Perko®2-3/8" Hole Bronze Extra Long Thru-Hull Fitting for 2" NPT Pipe (0348009PLB)2-3/8" Hole Bronze Extra Long Thru-Hull Fitting for 2" 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$128.34
- T-H Marine®Plastic White Over-Flow Thru-Hull Drain for 1-1/2" D Hose (TH-1502F-B)Plastic White Over-Flow Thru-Hull Drain for 1-1/2" D Hose by T-H Marine®. With Filter. 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 thru-hull...Filter prevents baitfish from passing thruStops debris from clogging drain$13.05
- Attwood®1-1/8" Hole Stainless Steel Thru-Hull Fitting for 3/4" D Hose, Aftermarket (66541-3)1-1/8" Hole Stainless Steel Thru-Hull Fitting for 3/4" D Hose, Aftermarket (66541-3) 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$34.48
- Attwood®1-5/16" Hole 90° Polypropylene Black Elbow Thru-Hull Fitting for 1-1/8"-1-1/4" Hose, Bulk (38701)1-5/16" Hole 90° Polypropylene Black Elbow Thru-Hull Fitting for 1-1/8"-1-1/4" Hose, Bulk (38701) by Attwood®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology...90° thru-hulls are ideal for tight installations, such as livewell overflow drainsDesign eliminates hose kinking$12.21
- Attwood®1-5/8" Hole Stainless Steel Elbow Thru-Hull Fitting for 1-1/8" D Hose, Bulk (665791)1-5/8" Hole Stainless Steel Elbow Thru-Hull Fitting for 1-1/8" D Hose, Bulk 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$63.73
- Attwood®1.27" Hole Stainless Steel Capped Composite Thru-Hull for 5/8" D Hose (68555-1)1.27" Hole Stainless Steel Capped Composite Thru-Hull for 5/8" D Hose by Attwood®. Designed for the value conscious customer, these fittings provide the look of a Stainless Steel thru-hull at a fraction of the cost. This product is made...High quality at an affordable priceExpertly made from premium materials$6.41
- T-H Marine®1" Hole 90° Elbow Two Nut Thru-Hull Fitting for 3/4" D Hose1" Hole 90° Elbow Two Nut 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$2.72 - $4.57
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.