Attwood HD 2000 Bilge Pump 4730-4, 12 Volt, Over 2000 GPH, Ball Bearing Design

The Attwood HD 2000 bilge pump (part number 4730-4) is Attwood's highest capacity bilge pump, built to move large volumes of water quickly to keep a bilge dry in demanding conditions. The pump runs on 12-volt power and delivers over 2000 GPH at open flow while drawing less than 7 amps, giving strong output without placing excessive load on the battery. A ball-bearing design allows the motor to run cooler, which extends motor life compared to pumps relying on bushings alone. The pump is equipped with an anti-airlock nozzle to help prevent air from becoming trapped in the pump housing during operation, which supports more consistent priming and water removal. It comes fitted with a 36 inch wire for connection into the boat's bilge pump circuit. The compact housing measures 5.97 inches by 3.83 inches, allowing it to fit into standard bilge pump mounting locations. This pump is suited for boat owners who need high-volume automatic bilge pumping and want a durable, cooler-running motor for long-term reliability.

Specifications

• Brand: Attwood
• Manufacturer Part Number: 4730-4
• Product Name: HD 2000 Pump
• Voltage: 12 volts
• Flow Rate: Over 2000 GPH at open flow
• Amperage Draw: Less than 7 amps
• Wire Length: 36 inches
• Bearing Type: Ball bearing
• Nozzle: Anti-airlock nozzle
• Dimensions: 5.97 inches x 3.83 inches
• Weight: 2.625 pounds
• UPC: 022697473042

Frequently Asked Questions

What voltage does the Attwood 4730-4 bilge pump run on? The Attwood 4730-4 HD 2000 bilge pump is a 12-volt pump.

How much water can this pump move? The Attwood HD 2000 pump (4730-4) delivers over 2000 GPH at open flow, making it Attwood's highest capacity bilge pump.

How many amps does the 4730-4 draw? It draws less than 7 amps, which is a relatively efficient draw given its over 2000 GPH open-flow output.

Why does this pump use a ball-bearing design instead of bushings? Ball bearings let the motor in the Attwood 4730-4 run cooler than a bushing-supported motor, which helps extend the motor's operating life.

What is an anti-airlock nozzle and does this pump have one? Yes, the Attwood HD 2000 pump 4730-4 includes an anti-airlock nozzle, designed to help keep air from becoming trapped in the pump housing so it primes and pumps more consistently.

How long is the wire on the 4730-4? The Attwood 4730-4 comes with a 36 inch wire for wiring into the bilge circuit.

What are the dimensions of the Attwood HD 2000 pump? The pump housing measures 5.97 inches by 3.83 inches.

How much does the Attwood 4730-4 bilge pump weigh? It weighs 2.625 pounds.

Is the Attwood 4730-4 an automatic bilge pump? The 4730-4 is Attwood's HD 2000 pump, an automatic bilge pump model built for high-volume water removal.

What is the difference between the HD 2000 pump and lower-capacity Attwood bilge pumps? Attwood markets the HD 2000 pump, including part number 4730-4, as its highest capacity bilge pump, moving over 2000 GPH at open flow versus the lower flow rates of smaller Attwood pump models.