Description
Attwood 1-1/2" Thru-Hull Barbed Fitting | Boat Supply Store
Engineered for marine environments, this Attwood thru-hull fitting is specifically designed for above-waterline installations where structural integrity and corrosion resistance are paramount. Featuring a 1-1/2" inner diameter barb and constructed from Enhanced 316 Stainless Steel, it offers superior lifetime protection against galvanic corrosion and oxidation, exceeding the longevity of lesser materials. With a total length of 3-1/8" and a short thread design of 1-1/4", it ensures a secure and space-efficient installation in confined areas or near hull corners, making it ideal for bilge pump discharges or scupper lines on sportfishing vessels operating in coastal Texas waters.
Key Features
- Corrosion Resistance Certified Enhanced 316 Stainless Steel alloy provides unparalleled lifetime protection.
- Aesthetic Appeal Mirror polished and passivated finish ensures a premium, lasting appearance.
- Durability Thick steel sidewalls are engineered to endure constant stress and hose flexing.
- Space Optimization Short thread design facilitates installation in tight compartments and corners.
- Secure Hose Attachment Barbed tail ends offer ample surface area for multiple robust hose clamps.
- Ease of Installation Integrated wrench flats or end notch allow single-person tightening.
- Reliable Sealing Includes a new silicone gasket for a leak-free, efficient seal.
- Long-Term Performance Outlasts plastic alternatives, ensuring dependable functionality over seasons.
Specifications
| Product Specifications | |
|---|---|
| Inner Diameter Hose Size | 1-1/2" |
| Flange Diameter | 3" |
| Thread Outer Diameter | 1-7/8" |
| Thread Length | 1-1/4" |
| Barb Length | 1-1/2" |
| Total Length | 3-1/8" |
| Recommended Hole Saw Size | 2" |
| Thread Type | 1-1/2" NPSM |
| Maximum Hull Thickness | 5/8" |
| Installation Location | Above the waterline only |
Who This Is For
Boat owners and marine professionals requiring a robust, long-lasting thru-hull fitting for above-waterline applications where space is limited. This fitting is ideal for installations near corners or in tight areas, providing superior corrosion resistance and a clean aesthetic.
How It Compares
| Feature | Attwood 1-1/2" Thru-Hull Barbed Fitting | Chrome-plated brass |
|---|---|---|
| Material | Enhanced 316 Stainless Steel | Bronze, Chrome-plated brass |
| Corrosion Resistance | Lifetime Corrosion Resistance | Good (Bronze), Fair |
| Finish | Mirror Polish & Passivated | Polished, Chrome Plated |
| Hose Size (Inner Diameter) | 1-1/2" | 1-1/2", 1-1/2" |
| Thread Size | 1-1/2" NPSM | 1-1/2" NPSM, 1-1/2" NPSM |
| Thread Length | 1-1/4" | 1-1/4", 1-1/4" |
| Max Hull Thickness | 5/8" | 5/8", 5/8" |
Common Concerns Answered
Why is this thru-hull fitting more expensive than plastic alternatives?
The higher initial investment in this Attwood fitting is justified by its construction from Enhanced 316 Stainless Steel, offering superior lifetime corrosion resistance and structural integrity that plastic cannot match. This premium material ensures long-term reliability and eliminates the frequent replacement costs associated with degraded plastic components.
What are the potential issues if this thru-hull fitting is not installed correctly?
Improper installation, particularly insufficient sealing, can lead to leaks at the hull penetration, potentially causing water ingress and damage. Adhering to the recommended installation procedures, ensuring the gasket is correctly positioned and tightened, is critical for a watertight seal.
How does the material and finish of this fitting contribute to its value?
The Enhanced 316 Stainless Steel provides exceptional resistance to saltwater corrosion and electrolysis, a critical factor for longevity. The mirror polish and passivation treatment further enhance this protection and offer a premium aesthetic that will remain visually appealing over time, unlike lower-grade materials.
Frequently Asked Questions
What is the maximum hull thickness this Attwood thru-hull fitting can accommodate?
This Attwood thru-hull fitting is designed for a maximum hull thickness of 5/8".
Can this thru-hull fitting be used for below the waterline installations?
No, this specific Attwood thru-hull fitting is explicitly designed and rated for above the waterline installation only.
What type of hose clamp is recommended for securing a hose to this fitting?
Due to the barbed tail design, multiple high-quality marine-grade hose clamps, such as double-clamped worm gear or T-bolt clamps, are recommended for a secure and leak-free connection.
What is the thread size of this Attwood thru-hull fitting?
The thread size of this thru-hull fitting is 1-1/2" NPSM (National Pipe Straight Mechanical).
What is the inner diameter of the hose that fits onto this thru-hull fitting?
This thru-hull fitting is designed to accommodate a hose with an inner diameter of 1-1/2".
