My Account
Shopping Cart

Attwood Marine 3874-3 Thru-Hull Connector 1-1/8" to 1-1/4" White

Manufacturer

Attwood Marine

<h3>About Attwood Marine</h3><p><strong>Attwood Marine</strong> has been a cornerstone of the boating world for well over a century. <a href="/7239-attwood-marine">Founded in 1893</a>, the company began by manufacturing precision underwater hardware and on-deck fittings — rudders, struts, cleats, and lights — and quickly earned a reputation for fine engineering and enduring quality. After World War I, the brand's craftsmanship was so well regarded that legendary boatbuilder Chris-Craft turned to Attwood for brass fittings on their iconic pleasure boats.</p><p>Today, Attwood operates as part of the Navico Group by Brunswick, a global family of industry-leading marine companies, yet it has never lost the boater-first focus that built its name. What distinguishes Attwood from many competitors is their end-to-end philosophy: they design, manufacture, test, and distribute their own products rather than simply sourcing components from third parties. Every item in the Attwood catalog is rigorously tested to meet or exceed U.S. Coast Guard (USCG), American Boat and Yacht Council (ABYC), and CE standards — giving boaters and OEM manufacturers alike the confidence to rely on Attwood gear season after season.</p><h3>A Complete Marine Accessories Ecosystem</h3><p>Attwood's catalog spans an impressively broad range of marine needs. On the comfort and ergonomics side, their <a href="/7239-attwood-marine-seat-pedestal-packages-200926">Seat &amp; Pedestal Packages</a> deliver complete, ready-to-install seating system solutions backed by decades of engineering refinement. For boaters who prefer to build or customize their setup, Attwood's <a href="/200999-pedestals-fixed-mount-attwood-marine-7239">Fixed Mount Pedestals</a> provide a sturdy, reliable foundation engineered for lasting stability on the water.</p><p>When it comes to protecting your hull at the dock, Attwood's <a href="/7239-attwood-marine-fenders-200396">Fenders</a> offer dependable, marine-grade cushioning against docks, pilings, and other vessels — an often-overlooked but essential piece of gear for every boat owner. Getting on and off the boat safely is equally important, and Attwood's <a href="/200179-boarding-ladders-attwood-marine-7239">Boarding Ladders</a> are designed with heavy-duty construction, rated hardware, and user-friendly features to make every entry and exit as secure as possible.</p><p>Beyond these categories, Attwood is also widely recognized for its bilge and aerator pumps, navigation lighting, fuel systems, rod holders, and trailering accessories — making the brand a true one-stop resource for outfitting or refreshing virtually any powerboat, fishing boat, or recreational vessel.</p><h3>Why Boaters Choose Attwood</h3><ul style="list-style:disc"><li><strong>100+ Years of Proven Experience</strong> — A heritage of quality engineering stretching back to 1893.</li><li><strong>Multi-Standard Compliance</strong> — Products tested to USCG, ABYC, and CE standards for safety and performance.</li><li><strong>OEM-Trusted</strong> — A leading supplier to major boat manufacturers across a wide range of product categories.</li><li><strong>Corrosion-Resistant Materials</strong> — Extensive use of 304 and 316 stainless steel, chrome-plated zinc, and marine-grade synthetics built for harsh saltwater environments.</li><li><strong>In-House Engineering</strong> — Advanced prototyping, simulation, and real-world testing ensure reliability before any product reaches the water.</li></ul>

Part Number

3874-3
09/19/2036 1:11 PM
Sale Price

$7.86

In Stock (8)

delivery box

Usually delivered within 2 days

Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Attwood Marine 3874-3 thru-hull connector provides a reliable, corrosion-resistant solution for routing hoses through boat hulls. Designed for hoses ranging from 1-1/8" to 1-1/4" in diameter, this fitting creates a secure, watertight connection that withstands harsh marine environments.

Key Features:

  • Molded from rugged marine-grade plastic that will not rust, corrode, or discolor over time
  • Non-conductive construction eliminates contribution to galvanic corrosion and electrolysis
  • Innovative design prevents unsightly hull streaking and staining
  • Allows countersinking for a flush, low-profile installation wherever required
  • White finish blends seamlessly with most hull colors
  • Fits standard hose sizes from 1-1/8" to 1-1/4" diameter

This thru-hull connector is ideal for bilge pump discharge lines, livewell systems, washdown applications, and other marine plumbing installations where a clean, reliable hull penetration is needed. The durable plastic construction ensures long-lasting performance without the maintenance concerns of metal fittings.

Products specifications

Finish

White

Flange

2-1/4"

Hose

1-1/8" - 1-1/4"

Install Hole Saw Size

1-3/8"

Length

3-1/4"

By far the fastest shipping and best prices on the web. Ordered it one day and it showed literally the next. Will definitely be buying from again!

Very good

So far so good.

Fast service purchased from them many times no problems and usually have coupon codes!! Will do buissiness with again.

its just an order, lets see how fast it gets here

Very fast shipping, always great prices.

I had a smog guy call me out that my filter was ok, my truck passed but since my pipe wasn't name brand we wouldn't pass me. It's a 2008 Nissan Titan. Needless to say I wasn't to happy about it but this place had what I needed for about $50 less than anywhere else and it shipped within 2 days. So far, so good, thanks Autoplicity

best price I could find...just ordered the product. Hope everything else is as good.

quick easy checkout and the cheapest shipping by far

Please for this item, specify that it is only 1 single shock, I was confused. But that yall!

I am a repeat customer and very happy with your products and pricing.

The price was right, and they were very helpful and told me all about the product I ordered, and had it shipped out to me quickly! <br><br>Thanks!

Super low prices! Quick check out options!

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy