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Sea-Dog Line 520790 Thru-Hull Fitting 1-1/2 Inch Polypropylene

Manufacturer

Sea-Dog Line

<h3>About Sea-Dog Line</h3><p>Few names in the marine industry carry as much history as <strong>Sea-Dog Line</strong>. Founded in 1923 and headquartered in Everett, Washington, Sea-Dog has spent over a century engineering and supplying dependable hardware for boaters, riggers, and marine professionals. Whether you are outfitting a small fishing boat or a serious offshore vessel, Sea-Dog's expansive catalog — spanning more than 2,400 products — is built around one principle: hardware that holds up when it matters most.</p><h3>A Century of Marine Innovation</h3><p>Sea-Dog Line began as a focused marine rigging and hardware supplier, and over the decades grew into one of the most comprehensive sources for anchoring, docking, boarding, and boat-management equipment in the industry. Their product line has expanded to include antenna accessories, trailer hardware, boat hooks, cabinet and hatch fittings, chain and rigging components, and a wide range of electrical accessories — all engineered to withstand the corrosive, high-stress environment of the marine world.</p><p>What sets Sea-Dog apart is a commitment to manufacturing quality that boat owners can rely on season after season. Their hardware is designed for real-world marine use, meaning saltwater resistance, UV stability, and structural durability are never afterthoughts.</p><h3>Marine Visibility & Windshield Systems</h3><p>One of Sea-Dog's highest-demand product areas is their line of <a href="/7549-sea-dog-line-windshield-washers-wipers-replacement-motors-201195">Windshield Washers, Wipers &amp; Replacement Motors</a>. Maintaining clear visibility on the water is a safety-critical function, and Sea-Dog supplies a broad assortment of wiper blades, washer systems, and complete replacement assemblies designed to fit a wide variety of marine windshield configurations. For boaters who need a direct drive solution, Sea-Dog's dedicated <a href="/7549-sea-dog-line-windshield-wiper-motor-8824">Windshield Wiper Motors</a> offer reliable performance in wet, high-vibration marine environments — a category where component quality directly affects on-water safety.</p><h3>Cockpit Comfort & Functionality</h3><p>Beyond hardware and visibility systems, Sea-Dog also brings practical innovation to the helm and cockpit with their <a href="/7549-sea-dog-line-cockpit-fillet-tables-200274">Cockpit &amp; Fillet Tables</a>. These tables are designed to maximize usable space aboard, whether you are prepping a catch, serving guests, or simply organizing gear. Sea-Dog's tables reflect the same build philosophy as all their hardware: functional, durable, and thoughtfully designed for the marine setting.</p><h3>Why Boaters Trust Sea-Dog Line</h3><ul style="list-style:disc"><li>Over 100 years of marine hardware expertise dating back to 1923</li><li>Headquarters in Everett, Washington, with a deep understanding of Pacific Northwest and offshore boating demands</li><li>A catalog of more than 2,400 products spanning virtually every marine hardware category</li><li>Products engineered for saltwater, UV exposure, and the vibration of on-water use</li><li>Trusted by recreational boaters, commercial operators, and marine riggers alike</li></ul><p>From rigging essentials to cockpit accessories and windshield systems, Sea-Dog Line remains one of the most complete and dependable marine hardware brands available today. Explore their full product range and find the right Sea-Dog components for your vessel.</p>

Part Number

520790
09/16/2036 8:17 AM
Sale Price

$10.89

In Stock (7)

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Usually delivered within 2 days

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Fitment guaranteed

Fitment guaranteed

Product Details

The Sea-Dog Line 520790 is a 1-1/2 inch thru-hull fitting constructed of durable injection-molded polypropylene, making it ideal for marine drainage applications above the waterline. This fitting is specifically engineered to resist electrolysis and corrosion in saltwater environments, providing reliable long-term performance.

Key Features:

  • Injection-molded polypropylene construction for superior corrosion resistance
  • Impervious to electrolysis in saltwater applications
  • 1-1/2 inch size compatible with standard marine hose
  • Designed for above-waterline drainage systems
  • Allows controlled water passage in or out of the vessel
  • Lightweight and chemical-resistant material

This thru-hull fitting provides a secure connection point for hose installations, ensuring proper drainage while maintaining hull integrity. The polypropylene material offers excellent resistance to marine environment degradation, making it a cost-effective alternative to bronze fittings for above-waterline applications.

so far so good didn't receive the product yet &gt;&gt;?

Good web purchase

The website has been having problems. I have tried to sobmit an order about 3x, and either the website gets stalled with the blue steering wheel turning back and forth, or getting stuck on not providing the 'State' pull-down, or something. I finally got

Best price seen.

efficient.

Easy

They had the parts I needed at the best price. I needed some questions answered to make sure I was ordering the right parts for a 4 year old car and they were very helpful when I called.

Good

Fast and easy

Great price on the gas jugs

A+++

ordered a steering box for a dodge truck, beat price i could find no hastle and easy to deal with i call and had a question and recieved an answer while on phone in just minutes.

I ordered what i needed at a very affordable price and the shipping was fast... 3 days.. i will be using these guys again..

very easy

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