Attwood Marine Universal Fuel Tank & Hose Fittings

Overview

The Attwood Marine Universal Fuel Tank & Hose Fittings is a range of replacement fuel system connectors for matching marine fuel tanks, hoses, elbows, anti-siphon valve locations, and in-line hose repair points. The range covers common small-boat fuel plumbing sizes, including 1/4 in. NPT, 1/4 in. NPTF, 3/8 in. NPT, 5/16 in. barb, 3/8 in. barb, and a 3/8 in. hose mender configuration.

These fittings are used where the fuel line needs a threaded tank connection, a hose barb transition, a 90-degree change in direction, an anti-siphon valve, or a splice for a 3/8 in. fuel hose. Depending on the configuration, the fitting is made from brass or aluminum, with the in-line splice kit using a brass mender and stainless steel clamps.

The fittings are suitable for leaded, unleaded, ethanol-blended, and alcohol-blended fuels. Threaded connections should be installed with thread sealant on the threads, and the final installation should be checked for fuel leaks before the boat is put back in service.

Key features

• Range includes a 90-degree elbow, hose-barb fittings, anti-siphon valves, and an in-line fuel splice kit for 3/8 in. hose repair.
• Connection options cover 1/4 in. NPT, 1/4 in. NPTF, 3/8 in. NPT, 5/16 in. barb, 3/8 in. barb, and 3/8 in. hose mender applications.
• Brass configurations are available for selected elbows, hose-barb fittings, and the in-line splice kit.
• Aluminum configurations are available for selected hose-barb fittings and anti-siphon valve fittings.
• Suitable for leaded, unleaded, ethanol-blended, and alcohol-blended fuels used in marine fuel systems.
• Threaded versions use male thread connections, with sealant required on the threads during installation.

Variants

This product family is offered in several configurations, with the main differences being fitting type, thread size, barb or mender size, and material. The range includes elbow, hose barb, anti-siphon valve, and in-line splice kit versions, so the correct option depends on the tank outlet, hose inside diameter, and whether the installation needs a straight connection, a 90-degree connection, a siphon-control valve, or a hose repair splice.

Across the range, the verified connection sizes include 1/4 in. NPT x 1/4 in. NPTF, 1/4 in. NPT x 5/16 in. barb, 1/4 in. NPT x 3/8 in. barb, 3/8 in. NPT x 3/8 in. barb, and 3/8 in. hose mender. Material varies by configuration, with brass and aluminum options available.

Installation and fit

Match the threaded side to the tank or fuel system port and match the barb or mender side to the fuel hose size. A 5/16 in. barb is not interchangeable with a 3/8 in. barb, and NPT thread size should be checked before installation rather than forced into an unmatched port.

For threaded fittings, apply a fuel-compatible thread sealant to the threads and tighten the fitting so it seats securely without over-stressing the tank fitting or adapter. Hose-barb connections should be secured with the proper fuel-line clamp for the hose type and installation location.

Use cases on board

These fittings are a practical match for maintenance work on small gasoline-powered boats, outboard fuel systems, portable or fixed tank connections, and dockside fuel line repairs where the existing hose or tank fitting size is already known. The anti-siphon valve options are used where the fuel system requires siphon control at the tank connection.

The in-line splice configuration is useful for repairing a damaged section of 3/8 in. fuel hose when replacing the full hose run is not practical at the time. After any fuel system work, the line should be inspected under normal operating conditions and any sign of seepage, odor, or soft hose should be addressed before use.

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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