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)
- Groco®FTH Series 3/4" Hole Bronze Combo Flush Thru-Hull Fitting for 3/4" NPS Pipe (FTH-750-W)FTH Series 3/4" Hole Bronze Combo Flush Thru-Hull Fitting for 3/4" 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....Machined flat face for flush mount or dripless applicationsNPSM/NPT combination thread$27.50
- Groco®HTH Series 1" Hole Stainless Steel Thru-Hull Fitting for 1" D Hose (HTH-1000-S)HTH Series 1" Hole Stainless Steel Thru-Hull Fitting for 1" D Hose (HTH-1000-S) 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...NPS Thread With Hose Connection#316 Stainless Steel$37.26
- Groco®HTH Series 1" Hole Stainless Steel Thru-Hull Fitting for 1-1/8" D Hose (HTH-1125-S)HTH Series 1" Hole Stainless Steel Thru-Hull Fitting for 1-1/8" D Hose (HTH-1125-S) 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...NPS Thread With Hose Connection#316 Stainless Steel$37.62
- Groco®HTH Series 1-1/2" Hole Stainless Steel Thru-Hull Fitting for 1-1/2" D Hose (HTH-1500-S)HTH Series 1-1/2" Hole Stainless Steel Thru-Hull Fitting for 1-1/2" D Hose (HTH-1500-S) 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...NPS Thread With Hose Connection#316 Stainless Steel$72.54
- Groco®HTH Series 1-1/4" Hole Stainless Steel Thru-Hull Fitting for 1-1/4" D Hose (HTH-1250-S)HTH Series 1-1/4" Hole Stainless Steel Thru-Hull Fitting for 1-1/4" D Hose (HTH-1250-S) 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...NPS Thread With Hose Connection#316 Stainless Steel$59.59
- Groco®HTH Series 1/2" Hole Stainless Steel Thru-Hull Fitting for 1/2" D Hose (HTH-500-S)HTH Series 1/2" Hole Stainless Steel Thru-Hull Fitting for 1/2" D Hose (HTH-500-S) 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...NPS Thread With Hose Connection#316 Stainless Steel$35.46
- Groco®HTH Series 2" Hole Stainless Steel Thru-Hull Fitting for 2" D Hose (HTH-2000-S)HTH Series 2" Hole Stainless Steel Thru-Hull Fitting for 2" D Hose (HTH-2000-S) 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...NPS Thread With Hose Connection#316 Stainless Steel$89.82
- Groco®HTH Series 3/4" Hole Stainless Steel Thru-Hull Fitting for 3/4" D Hose (HTH-750-S)HTH Series 3/4" Hole Stainless Steel Thru-Hull Fitting for 3/4" D Hose (HTH-750-S) 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...NPS Thread With Hose Connection#316 Stainless Steel$32.05
- Groco®HTH Series 3/4" Hole Stainless Steel Thru-Hull Fitting for 5/8" D Hose (HTH-625-S)HTH Series 3/4" Hole Stainless Steel Thru-Hull Fitting for 5/8" D Hose (HTH-625-S) 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...NPS Thread With Hose Connection#316 Stainless Steel$32.05
- Groco®HTHC Series 1" Hole 90° Stainless Steel Elbow Thru-Hull Fitting for 1" D Hose (HTHC-1000-S)HTHC Series 1" Hole 90° Stainless Steel Elbow 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...90 Degree Barb#316 Stainless Steel Thru Hull with Bronze Hose Connection$57.86
- Groco®HTHC Series 1-1/2" Hole 90° Stainless Steel Elbow Thru-Hull Fitting for 1-1/2" D Hose (HTHC-1500-S)HTHC Series 1-1/2" Hole 90° Stainless Steel Elbow 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...90 Degree Barb#316 Stainless Steel Thru Hull with Bronze Hose Connection$160.63
- Groco®HTHC Series 1-1/4" Hole 90° Stainless Steel Elbow Thru-Hull Fitting for 1-1/4" D Hose (HTHC-1250-S)HTHC Series 1-1/4" Hole 90° Stainless Steel Elbow 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...90 Degree Barb#316 Stainless Steel Thru Hull with Bronze Hose Connection$90.13
- Groco®HTHC Series 2" Hole 90° Stainless Steel Elbow Thru-Hull Fitting for 1-3/4" Hose (HTHC-2000-S)HTHC Series 2" Hole 90° Stainless Steel Elbow Thru-Hull Fitting for 1-3/4" 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...90 Degree Barb#316 Stainless Steel Thru Hull with Bronze Hose Connection$146.81
- Groco®HTHC Series 3/4" Hole 90° Stainless Steel Elbow Thru-Hull Fitting for 3/4" D Hose (HTHC-750-S)HTHC Series 3/4" Hole 90° Stainless Steel Elbow 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...90 Degree Barb#316 Stainless Steel Thru Hull with Bronze Hose Connection$46.45
- Groco®TH Series 1" Hole Stainless Steel Combo Thru-Hull Fitting for 1" NPS Pipe (TH-1000-WS)TH Series 1" Hole Stainless Steel Combo Thru-Hull Fitting for 1" NPS Pipe (TH-1000-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$54.88
- Groco®TH Series 1-1/2" Hole Stainless Steel Combo Thru-Hull Fitting for 1-1/2" NPS Pipe (TH-1500-WS)TH Series 1-1/2" Hole Stainless Steel Combo Thru-Hull Fitting for 1-1/2" NPS Pipe (TH-1500-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$63.11
- Groco®TH Series 1-1/4" Hole Stainless Steel Combo Thru-Hull Fitting for 1-1/4" NPS Pipe (TH-1250-WS)TH Series 1-1/4" Hole Stainless Steel Combo Thru-Hull Fitting for 1-1/4" NPS Pipe (TH-1250-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$61.27
- Groco®TH Series 1/2" Hole Stainless Steel Combo Thru-Hull Fitting for 1/2" NPS Pipe (TH-500-WS)TH Series 1/2" Hole Stainless Steel Combo Thru-Hull Fitting for 1/2" NPS Pipe (TH-500-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$21.11
- 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$20.16
- Forespar®251 Series 0.81" Hole Plastic White Mushroom Head Thru-Hull Fitting for 1/2" Pipe (906010)251 Series 0.81" Hole Plastic White Mushroom Head Thru-Hull Fitting for 1/2" 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$21.81
- Forespar®251 Series 1.028" Hole Plastic White Mushroom Head Thru-Hull Fitting for 3/4" Pipe (906012)251 Series 1.028" Hole Plastic White Mushroom 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$23.07
- Forespar®251 Series 1.282" Hole Plastic White Mushroom Head Thru-Hull Fitting for 1" Pipe (906014)251 Series 1.282" Hole Plastic White Mushroom Head Thru-Hull Fitting for 1" 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$26.36
- Forespar®251 Series 1.615" Hole Plastic White Mushroom Head Thru-Hull Fitting for 1-1/4" Pipe (906016)251 Series 1.615" Hole Plastic White Mushroom 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$30.59
- Forespar®251 Series 1.85" Hole Plastic White Mushroom Head Thru-Hull Fitting for 1-1/2" Pipe (906018)251 Series 1.85" Hole Plastic White Mushroom Head Thru-Hull Fitting for 1-1/2" 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$37.56
- Forespar®251 Series 2.32" Hole Plastic White Mushroom Head Thru-Hull Fitting for 2" Pipe (906020)251 Series 2.32" Hole Plastic White Mushroom Head Thru-Hull Fitting for 2" 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$50.53
- Forespar®253 Series 1.015" Hole Plastic White Mushroom Head Thru-Hull Fitting for 3/4" D Hose (906024)253 Series 1.015" Hole Plastic White Mushroom Head Thru-Hull Fitting for 3/4" D Hose 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$23.07
- Forespar®253 Series 1.125" Hole Plastic White Mushroom Head Thru-Hull Fitting for 1-1/8" D Hose (906070)253 Series 1.125" Hole Plastic White Mushroom Head Thru-Hull Fitting for 1-1/8" D Hose 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$29.92
- Forespar®253 Series 1.28" Hole Plastic White Mushroom Head Thru-Hull Fitting for 1" D Hose (906026)253 Series 1.28" Hole Plastic White Mushroom Head Thru-Hull Fitting for 1" D Hose 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$26.36
- Forespar®253 Series 1.615" Hole Plastic White Mushroom Head Thru-Hull Fitting for 1-1/4" D Hose (906028)253 Series 1.615" Hole Plastic White Mushroom Head Thru-Hull Fitting for 1-1/4" D Hose 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$29.92
- Forespar®253 Series 1.85" Hole Plastic White Mushroom Head Thru-Hull Fitting for 1-1/2" D Hose (906030)253 Series 1.85" Hole Plastic White Mushroom Head Thru-Hull Fitting for 1-1/2" D Hose 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...Expertly crafted from premium materialsHigh quality at a budget-friendly price$37.90
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.