Dolphin Amp Master 4750 Pump

The Dolphin Amp Master 4750 is a high-performance external aquarium pump designed for reliable, efficient water circulation in reef aquariums, freshwater aquariums, ponds, aquaculture systems, and other demanding aquatic applications. With a maximum flow rate of 4,750 GPH, the Amp Master 4750 provides powerful water movement while maintaining quiet, cool-running operation.

Designed for continuous-duty applications, the Dolphin Amp Master 4750 combines an efficient 1/15 HP motor, precision-engineered impeller, high-performance mechanical seal, and durable polymer construction. Its external pump design helps minimize heat transfer into aquarium water, making it an excellent choice for reef aquariums and other systems where stable water temperature is important.

The Dolphin Amp Master 4750 GPH pump is particularly well suited for aquarium filtration systems, sump return applications, reef aquariums, freshwater aquariums, aquaculture systems, fish holding systems, ponds, and commercial aquarium installations.

Key Features

• 4,750 GPH maximum flow rate
• 1/15 HP high-efficiency motor
• 115V, 60 Hz operation
• 1,725 RPM motor speed
• Near-silent, cool-running external pump design
• Designed to minimize heat transfer into aquarium water
• Custom-designed impeller for efficient water movement
• Precision-molded wet end
• High-performance mechanical seal
• Durable, high-performance polymer construction
• Resistant to UV exposure, chlorine, impact, cracking, and abrasion
• Suitable for freshwater and saltwater applications with the appropriate seal
• Designed for continuous-duty operation
• Flow can be reduced using a discharge ball valve without harming the pump
• Includes 1.5" Super Seal solid unions
• Includes anti-vibration pump pad
• Recommended for aquarium systems 120 gallons and larger
• Pre-filter and priming pot options are available for installations requiring suction lift or debris filtration

Dolphin Amp Master 4750 Specifications

• Model: Amp Master 4750
• Pump Type: External
• Maximum Flow: 4,750 GPH
• Motor: 1/15 HP
• Voltage: 115V
• Frequency: 60 Hz
• Motor Speed: 1,725 RPM
• Motor Amperage: 1.3A
• Service Factor: 1.0
• Power Consumption: Approximately 115–173 watts, depending on head height
• Dimensions: 12" L × 6.25" W × 8.25" H
• Inlet/Outlet: 1.5"
• Duty Rating: Continuous
• Suggested Aquarium Size: 120 gallons and larger
• Operating Temperature Range: 4°F–230°F (-20°C–110°C)
• Polymer pH Range: pH 4–10
• Included Accessories: 1.5" Super Seal solid unions and anti-vibration pump pad
• Warranty: 2–3 years depending on seal configuration
• Factory Service Guarantee: 10 years

Ideal Applications

The Dolphin Amp Master 4750 is an excellent choice for:

• Reef aquariums
• Saltwater aquariums
• Freshwater aquariums
• Aquarium sump return systems
• Aquarium filtration systems
• Coral propagation systems
• Fish holding systems
• Aquaculture systems
• Commercial aquarium installations
• Large ponds and water features
• Koi ponds
• Recirculating water systems
• High-volume water circulation

Excellent Choice for Reef Aquariums

The Dolphin Amp Master 4750 aquarium pump provides the dependable water circulation required by many medium and large aquarium filtration systems. Its external configuration keeps the motor outside the aquarium while providing strong circulation for sump returns, filtration equipment, closed-loop systems, and other water-processing applications.

For reef aquarium owners, freshwater hobbyists, aquaculture professionals, aquarium stores, and commercial installations, the Amp Master 4750 provides an efficient solution when reliable water flow and continuous operation are important.

Freshwater & Saltwater Pump Options

The Dolphin Amp Master 4750 is available with seal configurations designed for different water conditions. Dolphin recommends specialized saltwater seals for marine aquariums, reef systems, mineral-rich water, and chemically treated applications. These seals utilize corrosion-resistant materials designed to provide increased durability in demanding marine environments.

For freshwater aquariums, ponds, and other compatible applications, the freshwater seal configuration provides dependable long-term performance.

High-Flow External Aquarium Pump

If you are looking for a 4,750 GPH aquarium pump, external reef tank pump, aquarium return pump, high-volume aquarium pump, or aquaculture water pump, the Dolphin Amp Master 4750 is engineered to provide dependable circulation while delivering the benefits of an external pump design.

The Amp Master 4750 uses a custom-designed impeller matched to its motor rather than relying on multiple impeller configurations. Flow can also be adjusted with a discharge ball valve, allowing the pump to be matched to the requirements of your particular aquarium or water-circulation system.

Its combination of 4,750 GPH flow capacity, low power consumption, quiet operation, durable construction, and continuous-duty performance makes the Dolphin Amp Master 4750 an excellent choice for aquarium and water-circulation systems.