Attwood Marine HD 1700 Heavy-Duty Bilge Pump, 12V, 1700 GPH, Non-Automatic, 1-1/8 in Outlet
Got questions? Ask an expert!
Know someone who needs this?
Share it with your crew or mechanic.
Overview
The Attwood Marine 4730-4 is a 12V heavy-duty bilge pump that moves up to 1700 GPH at open flow, draws less than 6 amps, and uses a 1-1/8 in. I.D. discharge hose. It is fully submersible and supplied with a 36 in. wire lead, so it fits straightforward replacements and new bilge layouts where you need a higher-capacity pump without stepping up to a larger 24V system.
This pump makes sense when a lighter bilge pump is cycling too often, when an older 1500 GPH unit is no longer enough, or when the bilge space sees more abuse than normal weekend use. The anti-airlock nozzle, rotating outlet, and locking base help in real bilge compartments where hose routing is tight and access is limited.
The housing and internal materials are built for bilge areas that can see engine oil, detergent washdowns, vibration, and repeated duty cycles. That matters on fishing boats, cruisers, and workboats where the pump may spend years in a wet and dirty part of the hull.
Key features
- 12V heavy-duty electric bilge pump with 1700 GPH open-flow output
- Current draw stays under 6 amps, which helps on boats where power budget matters
- 1-1/8 in. I.D. outlet fits a common hose size for this capacity range
- Anti-airlock nozzle helps clear trapped air from the discharge side
- Rotating outlet and locking base give more freedom when routing hose in a tight bilge
- Fully submersible body for installation low in the hull
- 36 in. wire lead for hardwiring into the boat’s bilge circuit
- Tinned and caulked wire helps resist corrosion and water damage in marine wiring runs
- Exterior materials resist engine oil, aggressive detergents, and hose plasticizers
- Marine ignition protected and built to meet common marine standards including ABYC H-22, ISO 8846, ISO 8849, and CE
Compatibility and fit
This model is for 12V DC boats and is best matched to a bilge system using 1-1/8 in. discharge hose. A 10A fuse is the right size for the pump circuit. Before ordering, check your hose diameter, wiring run, and the space around the mounting area so the outlet can rotate cleanly without kinking the hose.
It is a non-automatic bilge pump. On boats that need unattended bilge operation, it can be paired with a separate float switch to create an automatic setup while keeping this pump as the main water-moving component.
Installation and setup
Mount the pump at the lowest practical point in the bilge and keep it below the water source so it can prime correctly. The 36 in. wire lead gives enough length for many direct replacements, but on longer runs you will still want clean marine-grade butt connections and proper support for the wiring above the bilge waterline.
Hose routing has a direct effect on output. This pump is rated at 1700 GPH at open flow, but flow drops to about 1300 GPH at 3.3 ft of head and about 950 GPH at 6.7 ft, so long vertical runs and unnecessary bends will reduce what you see in service.
Use on board
This is a good match for owners replacing an aging high-capacity bilge pump, builders rigging a 12V boat with a heavier-duty manual bilge circuit, and crews running hulls that spend long hours underway or at the dock in wet conditions. It also suits boats where the bilge compartment is compact but the pump still needs to cope with repeated cycling and dirty water conditions.
Shipping
We ship worldwide from the United States. Rates are calculated at checkout based on destination and package weight. Some items include free shipping, which will show automatically. Not every product is eligible for international shipping; checkout will confirm eligibility. We do not ship to PO Boxes except through USPS, and not all packages qualify.
Processing and dispatch
Most orders are verified, packed, and handed to the carrier within 1 to 2 business days. Some products may need extra handling time or ship directly from the manufacturer. For certain international orders, inventory transfers between warehouses may add time. If any delay is expected, we will let you know the dispatch date.
Delivery and tracking
Deliveries are handled by trusted carriers such as USPS, UPS, FedEx, and DHL. Estimated arrival times appear at checkout and depend on your location and the service you choose. These are estimates and can be affected by customs or carrier disruptions. A shipping confirmation with a tracking link is emailed when your order ships, and tracking may take up to 24 hours to update. You can also view tracking in your account.
Duties, taxes, and support
International customers are responsible for any customs duties, taxes, and fees charged by the destination country. If these charges are refused and a shipment returns to us, the carrier’s return cost and any re-entry customs fees will be deducted from the refund. If your order is late or you need help, contact cs@qualityboatparts.com and we will assist you.
Quality Boat Parts is a reseller. Many items include a manufacturer’s warranty, and all warranty service is handled directly by the manufacturer. We do not manage or administer warranty claims on behalf of customers.
Warranty terms, coverage, and duration are set by each manufacturer. Issues involving defects, repairs, or replacements must be addressed with the manufacturer’s support team. When available, the warranty period is listed on the product page. If it is not shown, contact us or the manufacturer for details before purchasing.
To start a claim, the customer must contact the manufacturer and follow their process. Keep your proof of purchase and original packaging, and register the product if the manufacturer requires it, as these are often needed for warranty service.
We are happy to help you find the right contact or documentation, but we cannot decide outcomes or intervene in claim resolutions. For guidance, email cs@qualityboatparts.com.