1. Important Safety Information
Please read and understand all safety instructions before installing or operating this pump. Failure to follow these instructions may result in electric shock, fire, serious injury, or property damage.
- Electrical Safety: Ensure the power supply is disconnected before performing any installation or maintenance. Connect the pump only to a 12V DC power source. Use appropriate fuse protection as specified (15-18 amp recommended).
- Water Safety: This pump is designed for fresh water only. Do not use with flammable liquids, corrosive chemicals, or water above 110°F (43°C).
- Installation: Mount the pump in a dry, well-ventilated area. Ensure all connections are secure and leak-free.
- Operation: Do not run the pump dry for extended periods. The pump features built-in thermal overload protection to prevent motor damage.
2. Product Overview
The Kohree 12V DC Fresh Water Pump (Model HY1733) is a self-priming diaphragm pump designed for reliable water transfer in various applications. It delivers a flow rate of 3.5 gallons per minute (GPM) with a pressure switch set to 55 PSI, making it suitable for RVs, campers, marine vessels, yachts, and garden irrigation systems.
Image: The Kohree RV Water Pump shown with various included accessories, such as hose barb fittings, a water strainer, and Teflon tape.
Key Features:
- High Flow & Pressure: 3.5 GPM flow rate and 55 PSI pressure for efficient water delivery.
- Self-Priming: Primes up to 3 meters (approximately 10 feet), simplifying initial setup.
- Run Dry Protection: Can run dry for short periods without damage, preventing motor burnout.
- Thermal Overload Protection: Automatically shuts off the motor if it overheats, ensuring safety and longevity.
- Low Noise Operation: Engineered for reduced operational noise.
- Durable Construction: Features an iron base for stability and quality materials for reliability.
Image: A diagram illustrating the pump's low noise level, comparing it to common sounds like whispering and a car refrigerator.
3. Specifications
| Specification | Value |
|---|---|
| Model Number | HY1733 |
| Voltage | 12 Volts DC |
| Maximum Flow Rate | 3.5 Gallons Per Minute (GPM) |
| Pressure Switch Setting | 55 PSI |
| Maximum Lifting Height | 124 Feet |
| Current Draw | 7.0 Amps (Max) |
| Recommended Fuse | 15-18 Amps |
| Material | Copper, Nylon/Polypropylene |
| Product Dimensions (L x W x H) | 10.98" x 5.63" x 5.08" |
| Item Weight | 10.2 ounces (approx. 290 grams) |
Image: Visual representation of the pump's basic parameters: 12V operating voltage, 3.5 GPM flow rate, and 124 feet maximum lift.
Image: Detailed product dimensions of the Kohree water pump, including overall length, width, and height, and inlet/outlet sizes.
Image: An illustration detailing the quality materials used in the pump's construction, such as Nylon/Polypropylene shell, EPDM/Viton sealing, copper motor, and anti-vibration rubber pump bracket.
4. Installation
Proper installation is crucial for optimal performance and longevity of your water pump.
4.1 Pre-Installation Checks
- Ensure the mounting surface is solid and stable.
- Verify that the power source is 12V DC and can supply the required amperage (7.0 Amps).
- Confirm you have all necessary plumbing fittings and hoses.
4.2 Mounting the Pump
Mount the pump in a location that is easily accessible for maintenance, protected from freezing temperatures, and as close as possible to the water source. Use the integrated mounting feet to secure the pump to a flat surface.
4.3 Plumbing Connections
- Inlet Connection: Connect the water supply line (from the freshwater tank) to the pump's inlet port. It is recommended to install a water strainer/filter on the inlet side to prevent debris from entering the pump.
- Outlet Connection: Connect the discharge line (to the RV/marine plumbing system) to the pump's outlet port.
- Fittings: Use the provided hose barb fittings for secure connections. Apply Teflon tape to threaded connections to ensure a watertight seal and prevent leaks.
Image: A schematic diagram illustrating a typical water pump installation in a yacht, showing connections to the freshwater tank, filter, accumulator tank, water heater, faucet, and shower.
Image: A schematic diagram illustrating a typical water pump installation within an RV's water system, connecting to various fixtures like sinks, toilets, and showers.
Image: Close-up view of the hose barb fittings provided for connecting water lines to the pump.
Image: A roll of Teflon tape, used for sealing threaded pipe connections to prevent leaks.
4.4 Electrical Connections
- Connect the positive (+) wire from the pump to the positive terminal of your 12V DC power source, ensuring an in-line fuse (15-18 amp) is installed.
- Connect the negative (-) wire from the pump to the negative terminal of your 12V DC power source.
- Ensure all electrical connections are secure and protected from moisture.
5. Operation
Once installed, operating the Kohree water pump is straightforward.
- Priming: Ensure the freshwater tank has water. Open a faucet in your system to allow air to escape. Turn on the pump's power. The pump will self-prime, drawing water and expelling air until a steady flow is achieved. Close the faucet once water flows consistently.
- Automatic Operation: The pump features a built-in pressure switch. When a faucet is opened, the pressure drops, and the pump automatically turns on. When the faucet is closed, the pressure builds up, and the pump automatically turns off.
- Run Dry Protection: The pump is designed to run dry for a short period without damage. However, it is best practice to ensure a water supply is always available to prevent unnecessary wear.
Image: A visual comparison showing low water flow before the pump and significantly improved, high water flow after the pump is activated, demonstrating its effectiveness.
6. Maintenance
Regular maintenance helps ensure the longevity and efficient operation of your pump.
6.1 Cleaning the Water Strainer
The inlet water strainer should be inspected and cleaned periodically, especially if you notice reduced water flow. To clean:
- Disconnect power to the pump.
- Unscrew the clear housing of the strainer.
- Remove the mesh filter and rinse it thoroughly under clean water.
- Reassemble the strainer, ensuring a tight seal.
Image: Exploded view of the water strainer, showing its main body, mesh filter, and clear housing, indicating how to disassemble for cleaning.
6.2 Pressure Switch Adjustment
The pressure switch is factory-set to 55 PSI. If minor adjustments are needed, consult a qualified technician. Improper adjustment can lead to pump malfunction or damage.
Image: A close-up view of the pressure switch on the pump, highlighting the adjustment screw for fine-tuning pressure settings.
6.3 Winterization
In freezing conditions, the pump and plumbing system must be winterized to prevent damage. This typically involves draining all water from the system or flushing with RV-specific antifreeze. Refer to your RV or marine vessel's specific winterization guidelines.
7. Troubleshooting
This section addresses common issues you might encounter with your water pump.
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump does not run | No power, blown fuse, loose wiring | Check power supply, replace fuse, tighten connections. |
| No water flow / Low flow | No water in tank, clogged strainer, air in system, kinked hose | Fill tank, clean strainer, prime pump, check hoses. |
| Pump runs continuously | Leak in system, faulty pressure switch, air in system | Check for leaks, inspect pressure switch, re-prime system. |
| Pump cycles on and off rapidly | Small leak, restricted flow, low voltage | Check for minor leaks, ensure clear flow path, verify voltage. |
8. Warranty and Customer Support
The Kohree 12V water pump is certified to CE standards and comes with a one-year warranty. If you experience any quality issues or are not satisfied with your purchase, please contact Kohree customer service for assistance.
For customer support, please refer to the contact information provided with your purchase or visit the official Kohree website.
9. Video Resources
No official product videos from the seller were available for embedding based on the provided data. Please refer to the manufacturer's website or product page for any available video resources.
