4LCII High Flow Plastic Impeller Solar High-Lift Pump

Model Interpretation:
4: Represents a pump body diameter of approximately 4 inches (approximately 100mm), which is more robust than the 3LCII and has a larger flow channel.
L: Vertical/Centrifugal.
C: Plastic Impeller.
II: Represents the second generation or multi-stage structure.

Power Range: Typically covers 1.5HP to 3HP (approximately 1100W - 2200W).
Core Form: Multi-stage centrifugal submersible pump.
Key Differences: Compared to the 3LCII, the 4LCII not only has a larger diameter, but its motor power is usually higher, and it is often designed with a full stainless steel pump body (external material), with internal plastic impellers.
Core Working Principle: Multi-stage centrifugal pressurization + plastic impeller
The working logic of the 4LCII series is "high power, high pressure":
Large Flow Channel Design: The 4-inch pump body allows for more impeller stages and a larger diffuser casing, thus generating tremendous pressure at high rotational speeds.
Advantages of Plastic Impellers: Although the impellers are plastic, they are made of high-strength engineering plastic (such as PPO). They are lightweight, corrosion-resistant, and have low friction loss, making them ideal for long-term high-speed operation.
DC Brushless Drive: Uses a high-performance DC brushless motor, coupled with an MPPT controller, which automatically adjusts the speed according to light intensity, making full use of solar energy.
Core Features: High flow rate, high head, corrosion resistance

Feature Details
Ultra-high pressure/High flow rate: Core advantage. This series is designed for long-distance water transfer. Depending on the configuration, it can easily reach a head of 100 meters or more while maintaining a large flow rate (e.g., 10-20 tons per hour), which is difficult for the 3LCII to achieve.
Corrosion-resistant, maintenance-free: Plastic impellers never rust, and the operation noise is extremely low. The motor usually uses high-temperature resistant copper wire, coupled with an oil-cooled or water-cooled system, providing a lifespan of tens of thousands of hours.
Wide range of applications: Suitable for both household water supply and medium-sized farm sprinkler and drip irrigation systems.

Typical Application Scenarios
The 4LCII series is the workhorse for medium-sized farms, village water supply, and long-distance water transfer:
Deep well water extraction (50-150 meters):
Specifically designed for deep wells, it can pump deep groundwater to the surface.
Long-distance agricultural irrigation:
Due to its high pressure, it is ideal for transporting water to farmland hundreds of meters or even kilometers away, or to orchards that require pumping water over small hills.
Household/small community water supply:
Used in centralized water supply systems for villa complexes and small villages, pumping water into elevated water towers.

Selection and Usage Recommendations
Matching well diameter:
The 4LCII is a 4-inch pump and must be installed in a 4-inch or larger diameter well. If your well is only 3 inches, this pump will not fit.
Strictly prohibited for pumping sand:
Although it is a "heavy-duty" pump, the impeller is still made of plastic. It is not wear-resistant, and if the well water contains a large amount of sand, the impeller will wear out quickly, resulting in insufficient pressure.
Recommendation: Only use in clean water environments. If the water is turbid or contains sand, please choose an industrial-grade pump with a full stainless steel impeller.
Cable configuration:
Due to the high power (usually 1kW-2.2kW or more), long-distance power transmission loss is significant. It is recommended to use a waterproof cable with a sufficiently large cross-sectional area (such as 2.5 square or 4 square millimeters) and ensure proper grounding protection.

The 4LCII series is the "all-rounder heavy hitter" among solar water pumps. It is more powerful and has a longer range than the 3LCII series. If your need is to "pump water from a deep well and transport it to a distant location," and the well water is clean, then the 4LCII series is a highly cost-effective choice.