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Attwood Marine 3878-3 Polypropylene Double Ended Thru-Hull Connection for 3/4" Hose

Manufacturer

Attwood Marine

<h3>About Attwood Marine</h3><p><strong>Attwood Marine</strong> has been a cornerstone of the boating world for over a century. Founded with a commitment to quality engineering and practical design, Attwood grew from manufacturing underwater hardware and on-deck fittings into one of the most recognized names across every segment of the marine accessories market. Today, the brand operates as part of the Navico Group by Brunswick — a global family of market-leading marine companies — yet it has never lost the focused, boater-first philosophy that built its reputation.</p><p>What sets Attwood apart is their end-to-end approach: they design, manufacture, test, and distribute their own products rather than simply resourcing components from third parties. Every product in their catalog is tested against the highest U.S. Coast Guard (USCG), American Boat and Yacht Council (ABYC), and CE standards, giving boaters and OEM boat builders alike the confidence that Attwood parts will perform when it matters most. Corrosion-resistant materials — including 304 and 316 stainless steel, chrome-plated zinc, and marine-grade synthetics — are used throughout the lineup to ensure durability in both freshwater and saltwater environments.</p><p>Attwood is also a leading OEM supplier, meaning you'll find their components pre-installed on boats straight from the factory. That pedigree speaks volumes: when boat manufacturers trust a brand to equip new vessels, that's a strong vote of confidence for the aftermarket buyer as well.</p><h3>Attwood Marine Product Categories</h3><p>Attwood's catalog spans a remarkably broad range of marine needs. On the docking and mooring side, their <a href="/7239-attwood-marine-fenders-201953">boat fenders</a> provide reliable hull protection against docks, pilings, and other vessels — an essential piece of gear for any boat owner. For on-water comfort and cockpit organization, Attwood's <a href="/7239-attwood-marine-seat-pedestal-packages-202496">seat &amp; pedestal packages</a> deliver complete seating system solutions backed by years of ergonomic engineering, while their <a href="/7239-attwood-marine-seat-clamp-mounts-202497">seat clamp mounts</a> and <a href="/7239-attwood-marine-seat-clamp-mounts-200927">mounting hardware</a> make swapping or positioning seats quick and secure. Rounding out the seating ecosystem, Attwood's broad selection of <a href="/7239-attwood-marine-seating-table-parts-accessories-202501">seating &amp; table parts and accessories</a> keeps every swivel, slide, and fitting performing at its best season after season.</p><p>Beyond seating and docking, Attwood is well known for its bilge and aerator pumps (including the iconic Sahara Mk2 and Tsunami series), navigation lighting, fuel systems, rod holders, and trailering accessories — making it a one-stop resource for outfitting or refreshing virtually any powerboat, fishing boat, or recreational vessel.</p><h3>Why Boaters Trust Attwood</h3><ul><li><strong>100+ years of marine expertise</strong> — a track record that few brands can match</li><li><strong>USCG, ABYC &amp; CE certified</strong> products built to rigorous safety and performance standards</li><li><strong>OEM-preferred supplier</strong> to leading boat manufacturers worldwide</li><li><strong>Corrosion-resistant construction</strong> engineered for saltwater and freshwater environments</li><li><strong>Full design-to-distribution control</strong> ensuring consistent quality across every product</li></ul>

Part Number

3878-3
06/01/2036 7:37 PM
Sale Price

$12.47

In Stock (10+)

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The Attwood Marine 3878-3 is a double-ended thru-hull connector designed to provide a watertight transition through bulkheads or tank walls. Constructed from durable polypropylene material, this fitting resists corrosion and provides reliable performance in marine environments.

Key Features:

  • Double-ended design for through-bulkhead or through-tank installations
  • Fits 3/4" marine hose
  • 5" overall length provides adequate thickness for most installations
  • Corrosion-resistant polypropylene construction
  • Creates watertight seal when properly installed

Important Installation Note: This thru-hull connector is designed for installation above the water line only. Not for below-waterline applications.

Ideal for livewell systems, baitwell plumbing, washdown systems, and other above-waterline marine plumbing applications where a watertight bulkhead penetration is required.

Products specifications

Dimensions

3/4" Hose Inner DiameterMax Hull Thickness 1 1/8"

Type

Thru-Hull Fittings

Excellent service and fast shipping. A seller I would do business with again.

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Shipping time sucks ass...... I ordered on Monday and I was told it ships 24 business hours after order. The item shipped late 3 day and will not receive my item until Wendsday a week and two days later talk about snail mail!!!!!! N

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Great

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First time like it so far

Did not receive a confirmation email when I placed the order so I was unsure if if the order had gone through properly. Part shipped the day after I ordered it. I received three confirmation emails at the that time for some reason. Overall I would say the experience ordering from Autoplicity was excellent and inspired confidence.

so far the experience has been great!

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