Introduction
Thank you for choosing the RESTMO Water Flow Meter. This device is designed to accurately measure water consumption and flow rate for various outdoor applications, including garden hose watering, RV water tank filling, lawn sprinklers, and irrigation systems. Please read this manual carefully before use to ensure proper operation and maintenance.
Product Overview
The RESTMO Water Flow Meter features an easy-to-read LCD screen and a single-button control for switching between multiple measurement modes. Its robust design ensures durability and weather resistance for outdoor use.

Figure 1: RESTMO Water Flow Meter and included adapters/connectors.
Key Features:
- Versatile Compatibility: Equipped with adapters for 3/4-inch to 1/2-inch hose nozzles and a connector for 1/2-inch hoses, suitable for various setups.
- Clear LCD Display: Easy-to-read screen for monitoring water usage and flow rate.
- Multiple Measurement Modes: Four distinct modes (Flow, Consumption, Average, Total) to track water usage effectively.
- Unit Switching: Easily switch between US Gallons and Liters.
- High Accuracy: Built-in Hall sensor and IC chip for precise measurements with less than 5% tolerance.
- Durable Construction: Made from premium sturdy ABS material, offering excellent weather resistance and IPX6 waterproof rating.
- Automatic Sleep Mode: LCD screen enters sleep mode after 1 minute of inactivity or no water flow to conserve battery.
Setup
Follow these steps to set up your RESTMO Water Flow Meter:
- Unpack the Device: Carefully remove the water flow meter and all accessories from the packaging.
- Identify Connections: The flow meter has an inlet and an outlet. The inlet is designed to connect to your water source (faucet/spigot), and the outlet connects to your hose or watering device.
- Attach Adapter (if needed): If your water source has a 3/4-inch nozzle, attach the provided adapter to the inlet of the flow meter. If your hose is 1/2-inch, use the appropriate connector on the outlet.

Figure 2: The water flow meter connected to a spigot, demonstrating its durable and leak-proof connection.
- Connect to Water Source: Screw the inlet of the flow meter (with adapter if used) securely onto your outdoor faucet or spigot. Ensure a tight, leak-free connection.
- Connect Hose: Attach your garden hose to the outlet of the flow meter. Again, ensure a secure connection to prevent leaks.

Figure 3: The flow meter is compatible with all standard outdoor faucets and garden hoses.
- Initial Power On: The device should power on automatically when water flows through it, or by pressing the button.
Operating Instructions
The RESTMO Water Flow Meter offers four measurement modes and unit switching functionality.
Measurement Modes:
Press the button briefly to cycle through the four modes:
- Flow Mode: Displays the real-time water flow rate (e.g., L/Min or Gal/Min).

Figure 4: Flow mode showing real-time water flow measurement during garden watering.
- Consumption Mode: Shows the amount of water consumed during the current or previous watering session. This value resets after a period of inactivity or when manually reset.

Figure 5: Consumption mode displaying water usage for a single session, useful for tasks like filling a pool.
- Average Mode: Displays the average daily water usage over the past 7 days, starting from the second day of use.

Figure 6: Average mode showing the average daily water usage, helpful for consistent lawn care.
- Total Mode: Shows the cumulative total water usage since the device was last reset.

Figure 7: Total mode displaying the overall water consumption, useful for tracking RV tank filling.
Unit Switching:
To switch between US Gallons and Liters:
- While in Flow Mode, press and hold the button for approximately 3 seconds. The unit displayed will change (e.g., from L/Min to Gal/Min).
- Note: 1 US Gallon is approximately 3.785 Liters.

Figure 8: The display showing unit conversion from Liters to Gallons per minute.
Resetting Data:
- To reset data in Consumption, Average, or Total Mode, press and hold the button for approximately 3 seconds. The displayed data for that specific mode will reset to zero.
Automatic Sleep Mode:
The LCD screen will automatically enter sleep mode after 1 minute of no operation or no water flow to conserve battery life. The device will wake up when water flows or the button is pressed.
Maintenance
Proper maintenance ensures the longevity and accuracy of your RESTMO Water Flow Meter.
- Cleaning: Wipe the exterior of the device with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Filter Washer: The flow meter includes a metal filter washer at the inlet. Regularly inspect and clean this filter to prevent debris from affecting measurement accuracy and flow.

Figure 9: The metal filter washer helps prevent dirt and debris from entering the flow meter.
- Storage: When not in use for extended periods, disconnect the flow meter from the water source and hose. Store it in a dry, cool place away from direct sunlight and extreme temperatures.
- Battery Replacement: The device uses a CR2032 button cell battery. When the low battery indicator appears on the LCD screen, replace the battery.

Figure 10: The low battery indicator light signals when the battery needs replacement.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No display on LCD screen. | Battery is dead or incorrectly installed. Device is in sleep mode. | Check battery orientation and replace if necessary. Ensure water is flowing or press the button to wake up the device. |
| Inaccurate readings. | Clogged filter washer. Air in the line. Incorrect unit setting. | Clean the metal filter washer. Ensure there is no air trapped in the hose system. Verify the unit setting (Gallons/Liters) is correct. |
| Water leakage from connections. | Loose connections. Worn out O-rings/washers. | Tighten all connections securely. Inspect O-rings and washers for damage and replace if needed. |
| Device not responding to button presses. | Battery issue. Internal malfunction. | Replace the battery. If the issue persists, contact customer support. |
Specifications
- Model: JP-O-WM-4-GN
- Brand: RESTMO
- Color: Green
- Material: Premium ABS
- Measurement Tolerance: < 5%
- Waterproof Rating: IPX6
- Power Source: Requires 1 x CR2032 button cell battery (not included). The device features an automatic sleep mode and a low battery indicator.
- Product Dimensions: 8.5 x 4 x 4 cm (3.35 x 1.57 x 1.57 inches)
- Product Weight: 150 g (0.33 lbs)
Warranty and Support
RESTMO products are designed for durability and performance. For warranty information, technical support, or any questions regarding your water flow meter, please contact RESTMO customer service through the retailer where you purchased the product or visit the official RESTMO website.
Please retain your purchase receipt as proof of purchase for warranty claims.





