1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your Anrain 4075SS-01 3/4 HP Pressure Booster Pump. Please read these instructions thoroughly before using the product. The 4075SS-01 is an upgraded version of the previously discontinued 3075SS-01 model.

Figure 1: Anrain 4075SS-01 3/4 HP Pressure Booster Pump, designed to resolve varied pressure issues, featuring a maximum height of 40 PSI and 3/4 HP motor.

Figure 2: The Anrain 4075SS-01 pump shown in a typical home pressure boosting setup, illustrating its function as an intelligent pressure-boosting system that automatically starts and stops based on water pressure.
2. Safety Information
Adhering to these safety guidelines is crucial for preventing damage to the pump and ensuring user safety.
2.1 Frost Protection
- If the water pump is not operating and the ambient temperature is below 4°C (39.2°F), drain all liquid from the pipelines and the pump body. This prevents damage or rupture due to freezing.
- For pumps that have been idle for an extended period, drain any remaining liquid from the pump body and refill it before resuming use.
- Consider wrapping the pump body and pipelines with insulation materials (e.g., cotton, cloth) or applying anti-freeze paint for additional frost protection.
2.2 Important Precautions
- Do not add antifreeze to the water medium, as this may damage seals and cause leaks.
- If the water pump or pipelines are frozen, do not attempt to force-start the pump. Use warm water or steam to thaw them.
- For cast iron pumps and pipelines, thaw slowly to prevent damage.
- Heating the pump or pipelines in a sealed state is strictly prohibited to prevent bursting.
3. Product Features
The Anrain 4075SS-01 pump is designed with several features to provide reliable water pressure boosting.
3.1 Automatic Water Transfer Jet Pump
- Equipped with a 3/4 HP motor and a durable impeller for strong and stable power.
- Maximum suction lift of 24 feet.
- Peak flow rate of 1,440 gallons per hour (24 GPM).
- Suitable for household water supply (faucets, showers, appliances) and garden irrigation.
3.2 Smart Automatic Switch Control
- Features a smart switch that automatically starts the pump when a faucet is opened.
- Automatically enters standby mode when faucets are closed, conserving energy.
- Includes an automatic water shortage protection function, stopping operation when water supply is insufficient to prevent dry burning damage.
3.3 Corrosion-Resistant Design
- Constructed with stainless steel for rust-proof and corrosion-resistant performance.
- Designed to withstand humid environments and daily water exposure.
- Comes with a 6.5-foot power cord for convenient installation.

Figure 3: Key internal components of the pump, including a pure copper coil for high conductivity, a fully welded impeller for strength, a high-temperature resistant mechanical seal for long service life, and the control panel for pump operation.

Figure 4: Detailed view of the pump's powerful motor, featuring a pure copper double-sided impeller for strong water discharge, stainless steel bearings to reduce friction, and a pure copper motor for robust, low-noise operation.
4. Specifications
Technical specifications for the Anrain 4075SS-01 Pressure Booster Pump.

Figure 5: Graphic illustrating key specifications of the Anrain 4075SS-01 pump, including 3/4 HP, 24 GPM max flow rate, 40 PSI max height, 1-inch inlet/outlet diameter, 115V/60Hz voltage/frequency, and 7.2A current.
| Specification | Value |
|---|---|
| Brand | Anrain |
| Model Number | 4075SS-01 |
| Horsepower | 3/4 HP |
| Voltage | 115 Volts (AC) |
| Maximum Lifting Height | 24 Feet |
| Maximum Pressure | 40 PSI |
| Maximum Flow Rate | 1,440 Gallons Per Hour (24 GPM) |
| Inlet/Outlet Diameter | 1 inch |
| Product Dimensions (L x W x H) | 18" x 10" x 17.3" |
| Material | Stainless Steel |
| Power Cord Length | 6.5 feet |
5. Installation
Follow these steps for proper installation of your booster pump.
- Connection: The booster pump features a 1-inch connection, compatible with standard garden hoses and household water supply systems. Ensure all connections are secure and use the provided leak-proof plug.
- Control Panel: Upon receiving the shipment, you will need to manually rotate and install the control panel onto the water pump. This separate packaging is designed to better protect the booster pump during transit.
- Placement: Position the pump in a location that is protected from freezing temperatures and direct exposure to the elements. Ensure adequate ventilation around the pump.
- Power Supply: Connect the 6.5-foot power cord to a suitable 115V AC power outlet.

Figure 6: The Anrain 4075SS-01 pump is suitable for various applications, including boosting water pressure for kitchen faucets, bathroom showers, lawn irrigation, and filling pools.
6. Operation
The Anrain 4075SS-01 pump is designed for automatic and efficient operation.
- Automatic Start: When a water outlet (e.g., faucet, shower) is opened, the pump's smart switch detects the drop in pressure and automatically starts to boost water flow.
- Automatic Standby: When all water outlets are closed, the pump detects the pressure increase and automatically enters standby mode, saving energy.
- Water Shortage Protection: If the water supply to the pump becomes insufficient, the automatic water shortage protection function will activate, stopping the pump to prevent damage from dry running. The pump will resume operation once adequate water supply is restored.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your pump.
- Winterization: During cold weather (below 4°C), ensure the pump and pipelines are completely drained of water to prevent freezing and potential damage.
- Long-Term Storage: If the pump will be idle for an extended period, drain all liquid from the pump body. Before reuse, refill the pump body with water.
- Inspection: Periodically inspect all connections for leaks and ensure the power cord is in good condition.
- Cleaning: Keep the exterior of the pump clean and free from debris to ensure proper heat dissipation.
8. Troubleshooting
This section addresses common issues you might encounter with your booster pump.
8.1 Leakage
- If you observe leakage after installation, carefully check the threaded openings and the mechanical seal. Ensure they are installed tightly and correctly. Loose connections are a common cause of leaks.
8.2 Pump Not Starting
- Verify the pump is properly connected to a power source and the outlet is functional.
- Check if the water supply is sufficient. The water shortage protection feature will prevent the pump from starting if there is no water.
- Ensure no pipelines are frozen. Refer to the safety information for thawing procedures.
8.3 Insufficient Pressure Boost
- Check for any blockages in the inlet or outlet pipes.
- Ensure the pump is primed correctly (if applicable for your specific setup).
- Verify that the pump is receiving adequate power.
9. Support
For any issues encountered while using your Anrain 4075SS-01 Pressure Booster Pump that are not covered in this manual, please contact Anrain customer support. We are committed to providing prompt assistance to ensure your satisfaction.
Please refer to the product packaging or the retailer's website for specific contact details.