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5V Mini Submersible Water Pump

Motor

Small DC water pump that works under water; for automatic plant watering and aquarium projects. It cannot be driven straight from an Arduino pin: run it through a MOSFET, a relay or a motor driver board, with a flyback diode across the motor. Never run it dry; it soon breaks.

Specifications

Type

Brushed DC submersible pump

Operating voltage

3 - 5V DC

Current

~100 - 200 mA

Flow

~80 - 120 L/hour

Lift

~0.4 - 1 m

Hose

~7.5 mm outer (5 mm inner) diameter

Use

Must be fully under water

Shop prices

• RobotistanIn stock41.81 ₺
• Robo90In stock44.64 ₺
• RobocomboIn stock45.00 ₺
• Robolink MarketIn stock49.50 ₺
• RobotzadeIn stock54.00 ₺
• SAMM MarketIn stock59.54 ₺
• Modül ElektronikIn stock74.55 ₺
• MotorobitIn stock176.75 ₺
• RobotsepetiIn stock246.87 ₺
• HobiDevreIn stock288.00 ₺

Prices read from the shops' pages on 22 October 2026. Prices and stock may have changed since; check at the shop before you buy.

Projects with this part

• Automatic Plant WateringIntermediate50 minA system that waters a potted plant by itself once the soil dries out: the soil moisture sensor measures moisture as a percentage, and when it drops below 30% the Arduino runs the mini submersible pump for 3 seconds through a relay, waits for the water to soak in, measures again and repeats until moisture passes 50%. The pump runs on three AA batteries of its own; the relay keeps that circuit fully apart from the Arduino. If 5 waterings in a row leave the soil dry, the tank counts as empty and the pump is stopped so it never runs dry. It teaches calibrating a sensor into a percentage, switching a separately powered load with a relay, powering a sensor only while it reads to slow its corrosion, and guarding a system against faults. No extra library needed.Open project