Attwood Marine Short Straight Barbed Thru-Hull Fitting, 316 Stainless Steel

Overview

The Attwood Marine Stainless Steel Thru-Hull Short Straight Barbed is a short-length stainless steel thru-hull fitting with a straight barbed hose tail for above-waterline plumbing connections on boats. It is made for installations where a hose needs to pass cleanly through the hull or transom, such as cockpit drains, baitwell drains, livewell plumbing, or other discharge points that sit above the waterline.

The fitting is cast from enhanced 316 stainless steel, with visible surfaces polished to a mirror finish and passivated for added protection in the marine environment. The short body helps in tighter spaces where there is limited room behind the hull, while the barbed end gives the hose a secure gripping surface for clamp installation.

Key features

• Enhanced 316 stainless steel construction helps resist corrosion in wet, salty, and washdown-prone areas.
• Short straight body suits tight behind-panel or transom spaces where a longer thru-hull would be harder to fit.
• Barbed hose tail supports a secure hose connection with marine hose clamps.
• Sealant channel under the flange helps hold bedding compound during installation.
• Silicone gasket adds a clean sealing surface between the flange and hull.
• Wrench flats and an end notch help the installer tighten the fitting from inside the hull.

Variants

This Attwood Marine thru-hull range varies by hose inner diameter, covering 5/8 inch, 3/4 inch, 1 inch, 1-1/8 inch, 1-1/4 inch, and 1-1/2 inch hose sizes. The matching size should be selected based on the hose already installed on the boat or the hose size specified for the drain, livewell, baitwell, or plumbing system being built.

Installation and fit

This fitting is intended for above-waterline use. Before drilling or replacing an existing thru-hull, confirm the hose inner diameter, hull thickness, available clearance behind the mounting surface, and access for tightening the nut and clamps. The polished flange sits on the outside of the hull, while the threaded body and barb pass through to the inside for connection to the hose.

Use a marine sealant suitable for the hull material and follow normal thru-hull bedding practices. The sealant channel under the flange helps keep sealant where it is needed, and the hose should be clamped securely after it is fully seated on the barb.

Use on board

This fitting is a practical match for boat owners replacing plastic thru-hulls with stainless steel hardware, or for builders and refit projects where the visible fitting needs a clean polished finish. It works well in exposed areas such as the transom, cockpit sides, or topsides where the fitting may see spray, sun, and regular washdowns.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Orders of $100 or more qualify for free shipping when eligible. For orders under $100, shipping costs are calculated at checkout based on destination, package weight, and selected service. International shipping is available for eligible products, and certain items may require additional handling, warehouse transfers, or may ship directly from the manufacturer, which can affect processing time.

Deliveries are handled by preferred carriers such as USPS, UPS, FedEx, DHL, and others depending on your location and selected service. Estimated delivery times are displayed at checkout and may vary due to customs processing, carrier delays, weather, postal disruptions, or other circumstances beyond our control. Once your order ships, you'll receive a confirmation email with tracking information. Tracking may take up to 24 hours to update on the carrier's website and is also available through your account when applicable.

We ship throughout the United States and to most international destinations for products eligible for international shipping. International orders may be subject to customs duties, taxes, brokerage charges, or other import fees, which are the customer's responsibility and are not included in the product or shipping price. PO Boxes are accepted only when shipping through USPS, and not all packages qualify for this option. If your order does not arrive within the estimated delivery window, please contact us at info@apollolighting.com or +1 (954) 375-0100 so we can assist with locating your package.

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Returns may be requested within 30 days of receiving your order. Items must be unused, uninstalled, unaltered, and returned in their original packaging with all tags, packing materials, blank warranty cards, manuals, instructions, accessories, and included items. Certain products, including installed or used electronics, electrical components, lighting, consumables, custom or special-order items, cut-to-length products, safety equipment, and merchandise exposed to water or marine conditions, may not be eligible for return.

To request a return, sign in to your account and select the applicable order and items, and submit your request for review. Eligible unfulfilled items may also be submitted for cancellation within 1 hour of placing the order. Returns or cancellations are not considered approved until you receive confirmation from Apollo Lighting. Please do not ship or drop off merchandise before receiving return approval and instructions.

Customers are responsible for arranging and paying for return shipping unless the return is due to an error by Apollo Lighting or the item is verified as defective, damaged, or incorrect. Missing, damaged, defective, or incorrect items must be reported within 2 business days of delivery, and photos or other documentation may be required for review. If the issue is verified, Apollo Lighting may provide or reimburse return shipping and issue a replacement or refund depending on the circumstances. International customers are responsible for return shipping, duties, taxes, customs charges, brokerage fees, and other costs associated with an international return.

After your return is received and inspected, approved refunds are issued to the original payment method and may take 5-7 business days to appear after processing. Original shipping and handling charges are nonrefundable, and the value of any included free items that are not returned may be deducted from the refund. Apollo Lighting does not charge a standard restocking fee on eligible returns. Returns that are incomplete, damaged, installed, used, altered, improperly packaged, or otherwise do not meet the eligibility requirements may be refused. We recommend using a trackable and appropriately insured shipping service for all customer-arranged returns.

For assistance, contact info@apollolighting.com or call +1 (954) 375-0100.

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Many products sold by Apollo Lighting include a manufacturer's warranty covering defects in materials or workmanship. Warranty terms vary by brand, product category, and model, so eligibility, coverage duration, exclusions, and available remedies are determined by the applicable manufacturer. We recommend reviewing the warranty information provided with your product before installation or use, especially for marine electronics, navigation equipment, lighting, electrical systems, pumps, safety equipment, and other specialized marine products.

If you need warranty service, the claim must follow the process established by the manufacturer, authorized service center, or designated warranty provider. You may be asked for proof of purchase, a serial number, product registration, photos, maintenance or installation records, or other documentation. Apollo Lighting does not determine or modify a manufacturer's warranty coverage or final claim decision, but we are happy to help provide purchase information and direct you to the appropriate manufacturer or warranty resource.

Keep your receipt, product documentation, serial number information, and original packaging when practical. Damage caused by normal wear, misuse, improper installation, insufficient maintenance, corrosion, impact, unauthorized modifications, electrical issues, or operation outside the manufacturer's specifications may not be covered. Warranty claims are separate from standard returns, so a product that has been installed, used, or exposed to marine conditions may no longer qualify for return while still remaining eligible for evaluation under the manufacturer's applicable warranty.

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