1. Daily Routine Maintenance (To Be Done After Each Use or Once a Day)

• Clean the water inlet and filter screen
  The inlet and filter screen are the easiest parts to get clogged by 泥沙 (sediment), 杂草 (weeds), or small debris.
  1. Turn off the DC power supply first (unplug the adapter or disconnect the battery) to avoid electric shock.
  2. Remove the filter screen (usually a detachable mesh cover at the inlet) and rinse it with clean water. For stubborn dirt, use a soft brush (not a hard wire brush) to scrub gently.
  3. Check the inlet pipe for blockages—blow through it or use water to flush if needed.
• Check for water leaks
  Inspect the pump body, pipe connections, and seals (such as O-rings) for water seepage.
  • If leaks are found at pipe joints, tighten the connectors slightly (avoid over-tightening to prevent cracking).
  • If seals are worn (visible cracks or deformation), replace them with new ones of the same model to prevent water from entering the motor.
• Ensure the motor is cool
  After use, touch the motor housing (the main body of the pump) with the back of your hand. If it feels excessively hot (too hot to hold for 2 seconds), stop using it immediately and let it cool down.
  • Overheating often means the pump is overloaded (e.g., the outlet pipe is too long or blocked) or the motor is aging. Address the cause before using it again.

2. Weekly/Monthly Maintenance (To Be Done 1–2 Times a Month)

• Clean the pump impeller (if accessible)
  The impeller is the rotating part that drives water flow—blockages here will reduce water output or damage the motor.
  1. Disassemble the pump cover (follow the user manual to avoid breaking parts) and take out the impeller.
  2. Wipe the impeller blades with a damp cloth to remove sediment or hair wrapped around it. For hard deposits, soak the impeller in vinegar for 10 minutes, then rinse.
  3. Reinstall the impeller and pump cover, ensuring alignment (misalignment will cause noise or leaks).
• Inspect the power cord and connector
  DC pumps rely on stable power supply—damaged wires are a safety hazard.
  • Check the power cord for cracks, fraying, or exposed copper wires. If damaged, replace the cord with a matching DC-rated one (do not repair it with tape, as it may fail).
  • Check the battery or adapter connector for rust or loose pins. Wipe rust with a dry cloth; if pins are loose, tighten them or replace the connector.
• Lubricate moving parts (if required)
  Some DC pumps (e.g., those with mechanical seals) need occasional lubrication.
  • Refer to the user manual—only use the lubricant recommended by the manufacturer (e.g., food-grade lubricant for pumps used in water supply).
  • Do not over-lubricate, as excess oil may seep into the water or block small parts.

3. Seasonal or Long-Term Storage Maintenance

• Drain all residual water
  Water left inside can cause freezing (which cracks the pump body) or rust.
  1. Disconnect the power and all pipes.
  2. Tilt the pump to drain water from the inlet, outlet, and motor housing (if there’s a drainage hole, open it).
  3. Run the pump for 10–20 seconds (without water) to blow out remaining moisture (do not run it longer, as dry operation damages the impeller).
• Clean and store in a dry place
  • Wipe the pump body with a dry cloth to remove dirt.
  • Store the pump in a cool, dry area (avoid direct sunlight or humid places like basements).
  • If using a battery-powered pump, remove the battery and store it separately (charge it to 50%–70% first to extend battery life).

4. Key Don’ts to Avoid Damage

• Do not run the pump without water (dry operation)
  Dry running causes the impeller and seals to overheat and wear out in seconds—always ensure the pump is submerged or connected to a water source before turning it on.
• Do not use the pump for non-water liquids
  DC water pumps are designed for clean water or lightly contaminated water (e.g., pond water with small sediment). Do not use them for oil, chemicals, or high-concentration sewage—this corrodes the pump body and motor.
• Do not exceed the rated voltage
  Using a higher-voltage adapter or battery (e.g., a 24V pump with a 36V battery) will burn the motor instantly. Always check the pump’s nameplate for rated voltage (e.g., 12V DC, 24V DC) before use.