1. Introduction
This manual provides essential information for the safe installation, operation, and maintenance of your MIZUDO 10 Gallon Point of Use Electric Water Heater. Please read all instructions carefully before installation and use. Retain this manual for future reference.
2. Safety Information
Your MIZUDO water heater is designed with multiple safety features and is UL Listed to ensure safe operation. Adherence to these safety guidelines is crucial for preventing injury and property damage.
- UL Certified: The unit meets recognized safety standards.
- T&P Relief Valve: A Temperature and Pressure (T&P) relief valve is included to regulate internal pressure and temperature, preventing hazardous conditions.
- HF-1 Flame Retardant: Materials used are HF-1 flame retardant for enhanced fire safety.
- IPX4 Waterproof: Provides protection against splashing water from any direction.
- Overheat Protection: Automatically shuts off the heater if water temperature exceeds safe limits.
- Over Pressure Protection: Safeguards against excessive internal pressure.
- Dry Combustion Protection: Prevents the heating element from operating without water.
- Anti-Freezing Protection: Protects the unit in cold environments.

3. Product Features
The MIZUDO 10 Gallon Point of Use Electric Water Heater offers efficient and reliable hot water for various applications.
- Large Capacity: 10-gallon capacity suitable for various household needs.
- Rapid Heating: 1500W heating element provides hot water in approximately 60 minutes.
- Energy Efficient: Well-insulated design with a 360° wrapped insulation layer minimizes heat loss.
- Adjustable Thermostat: Allows temperature settings between 90°F and 150°F for precise control.
- Durable Construction: Features a smooth enamel coating and a built-in, easily replaceable anode rod for corrosion protection and extended service life.
- Stable Water Temperature: Maintains water temperature fluctuation within 5°F of the set point.




Video: An overview of the MIZUDO Electric Hot Water Heater Tank, showcasing its features, installation options, and safety aspects. This video demonstrates the product's design and functionality.
4. Package Contents
Verify that all components are present in the package:
- MIZUDO 10 Gallon Electric Water Heater x 1
- User Manual x 1
- T&P Relief Valve x 1
- Power Cord Assembly (for plug-in option)

5. Installation and Setup
The MIZUDO 10 Gallon water heater is designed for flexible installation, either as a standalone unit or as a booster for an existing hot water system. It supports both plug-in and hardwired electrical connections.
5.1 Electrical Connection
The unit operates on 120V AC. You have two options for electrical connection:
- Plug-in: Use the included power cord for easy installation.
- Hardwired: Requires a 16 AWG hardwired connection (not included). Consult a qualified electrician for hardwired installations.

5.2 Water Connections
The water heater features 3/4" NPT water connections. Ensure proper plumbing practices are followed to prevent leaks.
- Connect the cold water inlet to your cold water supply.
- Connect the hot water outlet to your hot water distribution system.
- Install the T&P relief valve as per local codes and manufacturer instructions.
Maximum water pressure: 150 PSI.

5.3 Placement
The compact design (14.76" W x 27.9" H) allows for installation in various locations such as under sinks, in garages, or utility closets. Ensure adequate clearance for maintenance and proper ventilation.
6. Operating Instructions
6.1 Initial Startup
- Ensure the water heater is completely filled with water before turning on power. Open a hot water faucet to allow air to escape until a steady stream of water flows.
- Close the hot water faucet.
- Connect the unit to power (plug-in or hardwired).
6.2 Temperature Adjustment
The thermostat is adjustable from 90°F to 150°F. To adjust the temperature:
- Locate the thermostat dial pointer behind the protective cover on the front of the unit.
- Carefully adjust the dial to your desired temperature setting.
- Allow approximately 60 minutes for the water to reach the set temperature.
6.3 Reset Button
In case of an overheat event, the unit's safety mechanism will trip. To reset:
- Turn off the power to the unit.
- Press the reset button located near the thermostat dial.
- Restore power to the unit. If the issue persists, consult the troubleshooting section or contact customer support.
7. Maintenance
Regular maintenance ensures optimal performance and extends the lifespan of your water heater.
- Anode Rod Inspection/Replacement: The built-in anode rod protects against corrosion. Inspect it annually and replace as needed, especially in areas with hard water.
- T&P Valve Testing: Test the T&P relief valve at least once a year by lifting the lever. Water should discharge from the drain pipe. If no water discharges, or if it continues to discharge, replace the valve immediately.
- Draining the Tank: If the unit will be unused for an extended period or if there is a risk of freezing, drain the tank completely.
8. Troubleshooting
This section provides solutions to common issues. For problems not listed here, or if solutions do not resolve the issue, please contact MIZUDO customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| No hot water | No power; Thermostat tripped; Heating element failure | Check power supply/breaker; Press reset button; Contact support for element replacement |
| Water not hot enough | Thermostat set too low; Insufficient recovery time; Tank size inadequate for demand | Increase thermostat setting; Allow more time for heating; Consider usage patterns |
| Leaking from unit | Loose connections; T&P valve discharge; Tank failure | Tighten connections; Check T&P valve operation; Contact support for tank inspection |
| Noisy operation | Sediment buildup in tank; Loose heating element | Drain and flush tank; Contact support for inspection |
9. Specifications
Detailed technical specifications for the MIZUDO Etech Pro 10 Gallon Electric Water Heater.
| Feature | Detail |
|---|---|
| Brand | MIZUDO |
| Model Number | Etech Pro 10 Gallon |
| Capacity | 10 Gallons |
| Power Source | 120V AC Hardwired |
| Wattage | 1500 Watts |
| Voltage | 120 Volts |
| Product Dimensions (W x H) | 14.76" W x 27.9" H |
| Item Weight | 37.5 Pounds |
| Water Connection | 3/4" NPT |
| Maximum Temperature | 150 Degrees Fahrenheit |
| Maximum Pressure | 150 PSI |
| Mount Type | Floor Mount |
| Material Type | Porcelain Enamel, Stainless Steel |
| Certifications | UL Listed |

10. Warranty and Support
MIZUDO provides the following warranty for your water heater:
- 1 Year Warranty for the Whole Unit
- 3 Year Warranty for the Inner Tank
For technical assistance, warranty claims, or to purchase replacement parts, please visit the official MIZUDO store or contact customer support through the provided channels on the product packaging or website.
MIZUDO Store: https://www.amazon.com/stores/CreatingComfortableLiving/page/610AF0BF-0794-44BE-9F7E-74B7D8EEB19F





