Stookin Mini Water Pump 3-6 V DC Water Pump, 9 V Water Pump with 1 Meter Transparent Pipe Submersible Water Pump Educational Electronic Hobby Kit

About this product

A Mini DC 3-6V Water Pump is a compact, low-cost submersible pump widely used in DIY electronics, robotics, and automated watering systems. Because it operates safely on low voltage, it is a favorite component for projects involving microcontrollers like Arduino or Raspberry Pi.Here is a detailed description of its typical features, specifications, and common uses:1. Core Mechanism and DesignType: Centrifugal submersible pump. It uses a small rapidly spinning impeller inside the casing to pull water in through the center hole and push it out through the side nozzle.Submersible: These pumps are designed to be completely dropped into water. The motor is sealed inside a waterproof plastic shell (usually epoxy-potted).Brushless DC Motor: Most modern versions use a micro brushless motor, which provides a longer lifespan and quieter operation compared to brushed motors.2. Typical Specifications(Note: Exact specs vary slightly by manufacturer, but these are the standard ranges)Operating Voltage: 3V to 6V DC (Works perfectly on standard 5V USB power, AA battery packs, or 3.7V LiPo batteries).Current Draw: 100mA to 200mA (Low enough to be driven by simple motor driver ICs or transistors).Flow Rate: 80 to 120 Liters per Hour (L/H).Maximum Lift (Head): 0.3 to 0.8 meters (This is how high the pump can push the water straight up through a tube).Outlet Diameter: Typically around 4.5mm to 7.5mm (designed to fit standard silicone aquarium tubing).Noise Level: Very low, usually under 30-40 decibels.3. Common ApplicationsAutomated Plant Watering: Paired with a soil moisture sensor to water houseplants automatically.DIY Fountains & Waterfalls: Creating small desktop water features.PC Liquid Cooling (Budget): Sometimes used in homemade, low-power liquid cooling loops.Aquariums & Terrariums: For circulating water or creating small drip systems for reptiles.STEM & Science Projects: Teaching students about fluid dynamics and basic circuitry.Important Usage TipsNever Run Dry: These pumps rely on the water they pump to lubricate and cool the internal impeller. Running them in the open air without water can cause friction, overheating, and permanent damage to the motor.Polarity Matters: Connecting the positive (usually red) and negative (usually black) wires correctly ensures the impeller spins in the right direction to push water efficiently.Not for Hot Water: The plastic casing and internal seals are generally rated for room temperature water (usually not exceeding 50°C/120°F). • Power Source: DC • RoHS Compliant • Material: Plastic • Weight: 0.2