Attwood Marine 90-Degree P-Trap Fuel Tank Vent, 5/8 in ID Hose, 3/4 in Install Hole, 9/16 in Max Hull Thickness, ABYC

Overview

The Attwood Marine 90° P-Trap Fuel Tank Vent is a surface-mount vent for permanently installed marine fuel systems using 5/8 inch I.D. vent hose. It helps the tank breathe during filling and normal operation while its baffled P-trap layout reduces the chance of splash water reaching the vent line, fuel tank, or carbon canister.

This vent is a practical fit for boat builders, refits, and fuel-system service work where a compact 90° vent is needed on the hull side. It uses a 3/4 inch installation hole, supports hull thickness up to 9/16 inch, and is made for normal sea conditions and washdowns where fuel-tank venting still needs to remain open.

The design can reduce or remove the need for an anti-siphon loop in the vent hose when the vent location allows it, which can simplify hose routing and help keep the run to the fuel tank shorter. It meets ABYC requirements and also meets ISO 10088 minimum venting-area requirements.

Key features

• Fits 5/8 inch I.D. fuel vent hose used on many marine fuel-tank installations.
• P-trap vent path helps block splash water while still letting air move freely through the fuel system.
• 3/4 inch installation hole and 9/16 inch maximum hull thickness support a clean surface-mount fit.
• 90° body helps route the vent hose inside the hull without a large straight-back clearance requirement.
• Can eliminate the need for an anti-siphon loop in the vent hose when the installation location is suitable.
• Removable cover allows access for vent inspection, debris removal, and fuel-system pressure testing.
• Meets ABYC requirements and ISO 10088 minimum venting-area requirements for marine fuel-tank venting.
• Compatible with ethanol-blended fuels for use in modern gasoline fuel systems.

Variants

This product is offered in two visible trim configurations for the same general vent style. The difference is the exterior head or cover finish, which affects how the vent appears on the hull after installation.

Both variants are 90° P-trap fuel tank vents for 5/8 inch I.D. hose. The shared vent function, hose size, installation-hole size, and marine fuel-system use remain consistent across the range.

• 1670-3 with black vent head. This version keeps the exterior appearance low-profile on dark hulls, painted surfaces, or hardware layouts where a black fitting blends in better.
• 66419-3 with stainless steel trim cover. This version adds a stainless trim face for installations where nearby deck or hull hardware has a brighter metal finish.

Installation and fit

Use this vent where the fuel tank requires a dedicated vent line to relieve air during filling and normal fuel draw. The 90° orientation is useful when space behind the hull side is limited or when a more direct hose path helps avoid unnecessary bends.

Check the hose size, hull thickness, and mounting location before installation. The vent should be placed where it can shed spray and washdown water properly, with the hose routed so it does not kink, sag in a way that traps fuel, or interfere with other fuel-system components.

Use on board

This vent is a good match for small to mid-size powerboats, fishing boats, runabouts, and refit projects that need a replacement fuel-tank vent with water-resistance built into the fitting. It is especially useful where the outside vent must handle spray, rain, and routine washdowns without giving up free airflow to the tank.

For service work, the removable cover helps with inspection and cleaning around the vent opening. That matters on boats stored outdoors or used in areas where salt, dirt, wax, or dockside debris can collect around hull fittings over time.

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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