Attwood Marine HD2000 Heavy-Duty Bilge Pump, 2000 GPH, 1-1/8 in Port, Anti-Airlock Nozzle

Overview

The Attwood Marine HD2000 is a heavy-duty non-automatic bilge pump for boats that need 2000 GPH open-flow capacity in either 12V DC or 24V DC electrical systems. It uses a 1-1/8 inch outlet and is built around a compact body measuring about 5.97 inches high by 3.83 inches in outside diameter, making it a practical fit for many bilge compartments where space, hose routing, and service access matter.

The anti-airlock nozzle helps vent trapped air that can stop a bilge pump from moving water, while the rotating outlet gives more flexibility when routing discharge hose through tight lockers or deep bilge spaces. This is a non-automatic pump, so it is typically wired to a separate bilge switch, float switch, or helm control rather than operating by itself.

Internal details such as tinned and caulked wiring, a molded two-wire seal, a stainless steel motor shaft, and a shaft seal built for long service are useful in wet bilge areas where vibration, corrosion, and chemical exposure are part of normal boat life.

Key features

• 2000 GPH open-flow capacity for high-volume bilge water removal on larger recreational boats, workboats, and yachts.
• Available for 12V DC and 24V DC installations, so the pump can match the boat’s existing electrical system.
• Anti-airlock nozzle vents trapped air while helping prevent spray streams during operation.
• 1-1/8 inch outlet fits common high-capacity bilge discharge hose sizes.
• Rotating outlet helps simplify hose alignment in bilge spaces where the discharge run is not straight.
• Locking tab and swivel base allow eight mounting positions for better placement in tight or uneven bilge areas.
• Advanced resin exterior resists common bilge-area chemicals such as engine oil, strong detergents, and hose plasticizers.
• Tinned and caulked wire, molded two-wire seal, and stainless steel motor shaft help reduce water-related electrical and shaft wear issues.

Variants

This HD2000 pump is offered in two voltage configurations for boats with different DC electrical systems.

The pump capacity, outlet size, anti-airlock nozzle, rotating outlet, and mounting layout remain consistent across these configurations. The main difference is the rated voltage, along with the electrical protection and current draw that match that voltage.

• 4770-1: Rated Voltage 12V DC. This version matches common 12V DC bilge pump circuits and uses a 12A fuse with a maximum current draw of 6.6A.
• 4770-4: Rated Voltage 24V DC. This version is for 24V DC boat electrical systems and uses a 7A fuse with a maximum current draw of 3.5A.

Installation and setup

Install the pump low in the bilge where water naturally collects, while keeping enough clearance to service the strainer area and route the discharge hose without kinks. The 1-1/8 inch hose run should be secured and routed upward to a proper thru-hull discharge point with attention to backflow prevention and the boat’s existing bilge plumbing layout.

Because this is a non-automatic pump, the wiring plan should include the correct voltage model, proper fuse size, marine-grade wiring practices, and a suitable switch arrangement. The 12V version should not be used on a 24V system, and the 24V version should not be used on a 12V system.

Use on board

The HD2000 is a good match for boats where a higher-capacity bilge pump is needed for a main bilge, machinery space, or backup pumping location. Its anti-airlock nozzle is especially useful in installations where the discharge hose layout can trap air after the bilge has been pumped down.

For coastal cruising, fishing boats, and larger vessels with deeper bilges, the combination of high flow, flexible outlet orientation, and voltage-specific options makes it easier to match the pump to the boat rather than forcing the boat to match the pump.

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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