The Type 2 Submersible Water Pump is an ultra-compact, low-noise fluid pump driven by a miniature DC motor. Designed to operate efficiently within a 3V to 6V range, it is directly compatible with microcontrollers, low-voltage solar panels, and battery packs. Its fully sealed, waterproof construction ensures reliable performance for small-scale water circulation, automated plant watering systems, and DIY hydroponic setups.

Specifications

• Operating Voltage: 3V to 6V DC
• Flow Rate: 120 Litres per Hour (L/H) max
• Water Lift (Head): 0.35 meters to 0.55 meters max
• Current Consumption: 100mA to 200mA under load
• Power Rating: 0.4W to 1.5W
• Outlet Outer Diameter: 7.5mm
• Outlet Inner Diameter: 4.5mm
• Waterproof Rating: IP68 (Submersible installation only)
• Material: Durable engineering plastic

Interface and Connection Guide

• Positive Lead (Red): Connects to the positive DC voltage output (3V – 6V) from a motor driver, transistor switch, or relay.
• Negative Lead (Black): Connects to the common ground (GND) of the power source.
• Fluid Outlet: Connects to a standard 7mm or 8mm inner diameter flexible vinyl or silicone tubing.

Important Drive Warning: Do not connect this pump directly to the GPIO pins of an Arduino, ESP32, or Raspberry Pi. The current draw (up to 200mA) will permanently damage the microcontroller port. Always use an external driving circuit such as a relay module, a MOSFET switch, or a transistor (like the PN2222) with a protective flyback diode.

Key Features

• Ultra-Quiet Operation: Engineered with sound-dampening internal mechanics to minimize operational vibrations and ambient humming noise.
• Low-Voltage Efficiency: Runs smoothly at low power thresholds, making it ideal for compact, battery-operated, or USB-powered desktop projects.
• Fully Submersible Design: Epoxied internal motor windings prevent water ingress, ensuring safe, continuous underwater operation.
• Simple Plumbing Integration: The barbed outlet tube locks securely onto flexible hobbyist hoses without requiring heavy tools or industrial clamps.

Common Applications

• Automated Smart Agriculture: Pumping water in automated flowerpots, smart indoor gardens, and Arduino-based soil moisture triggers.
• Aquariums and Fountains: Powering desktop fish tanks, miniature indoor water fountains, and small aquaponic loops.
• DIY Liquid Cooling: Circulating coolant fluids through small-scale thermal management setups.
• Educational STEM Labs: Serving as a practical tool for school science labs demonstrating fluid dynamics and automated routing.

Usage Tips

• Avoid Dry Running: This pump must be fully submerged in water before turning on power. Running the pump dry (without water flowing through it) will quickly overheat the internal components and burn out the motor.
• Fluid Cleanliness: Only use this pump in clean water. Debris, sand, or algae can clog the tiny internal impeller, stalling the motor and causing it to overheat.
• Voltage Management: Running the pump consistently at 6V provides the maximum flow rate and lift, while dropping down to 3V significantly reduces power consumption and ambient noise.
• Secure Mounting: Use a small piece of double-sided foam tape or suction pads at the base of the tank to secure the pump body, preventing it from moving due to water pressure recoil.