1. Introduction
This manual provides essential information for the safe and efficient operation, installation, and maintenance of your Eemax Thermostatic Multi Lav Electric Tankless Water Heater. Please read this manual thoroughly before installation and use, and retain it for future reference.

Image: Front view of the Eemax Thermostatic Multi Lav Electric Tankless Water Heater, showing its compact, rectangular design with the Eemax logo and connection points at the bottom.
2. Product Features
The Eemax Thermostatic Multi Lav Electric Tankless Water Heater is designed with advanced features to provide efficient and reliable hot water. Key features include:
- Radiant floor applications
- Hot or cold water feed compatibility
- Microprocessor temperature control for accurate temperature regulation
- Fitted with 1/2" copper pipe compression fittings with rear or bottom electric entry options
- Functions as a kitchen sink or bar sink in-line booster
- Eliminates long waits for hot water by producing hot water immediately and gradually reducing power input as tank hot water arrives
- Automatically shuts off and maintains constant temperature regardless of the number of sinks in use
- Ideal for hand set showers, pool houses, spare bedrooms, and vacation homes
- Can serve as an in-line booster for existing tank heaters
- Suitable as a backup system for solar heating
- 99% energy efficient
3. Technical Specifications
Refer to the table below for detailed technical specifications of the unit:
| Specification | Value |
|---|---|
| Manufacturer | Generic |
| Part Number | SPEX4208T-S |
| Style | Indoor Installation |
| Voltage | 208 Volts |
| Kilowatts (kW) | 4.1 kW |
| Amperage | 20 A |
| Max Flow (GPM) | 0.2 GPM |
| Product Dimensions (W x H) | 5"W x 3"H |
4. Installation and Setup
Installation of this electric tankless water heater requires professional plumbing and electrical knowledge. Improper installation can lead to property damage, injury, or death. Always consult with qualified professionals.
4.1. Safety Precautions
- Ensure power is disconnected at the main breaker before any installation or maintenance.
- Verify correct voltage and amperage requirements as per specifications.
- Follow all local plumbing and electrical codes.
- Do not install in areas prone to freezing temperatures.
4.2. Mounting
Select a suitable indoor location that is easily accessible for maintenance and protected from freezing. Mount the unit vertically using appropriate fasteners, ensuring it is level and securely attached to a solid surface.
4.3. Plumbing Connections
Connect the cold water inlet and hot water outlet to the unit using 1/2" copper pipe compression fittings. Ensure all connections are watertight. A shut-off valve should be installed on the cold water supply line to the unit.
4.4. Electrical Connections
Connect the unit to a dedicated electrical circuit as specified in the technical specifications (208V, 20A). Use the minimum recommended wire size (8AWG) and ensure proper grounding. All electrical work must comply with national and local electrical codes.
4.5. Initial Start-up
Before restoring power, ensure the unit is completely filled with water by opening a hot water faucet until a steady stream of water flows. This purges air from the system. Once water flows steadily, close the faucet and restore power to the unit.
5. Operating Instructions
The Eemax Thermostatic Multi Lav Electric Tankless Water Heater operates automatically to provide hot water on demand.
5.1. Temperature Control
The unit features microprocessor temperature control to maintain a consistent output temperature. The factory preset temperature is typically suitable for most applications. Refer to the specific model's control panel or internal settings for adjustment procedures, if available.
5.2. Hot Water Delivery
When a hot water faucet is opened, the unit senses the water flow and activates to heat the water instantly. The unit will modulate its power input to maintain the desired temperature, even when used as an in-line booster with existing tank heaters.
5.3. Energy Efficiency
The unit is 99% efficient, heating water only when needed, which helps reduce energy consumption compared to traditional tank water heaters.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your water heater.
6.1. General Cleaning
Wipe the exterior of the unit with a soft, damp cloth. Do not use abrasive cleaners or solvents.
6.2. Sediment Filter (If Applicable)
Some installations may include an external sediment filter. Check and clean or replace this filter periodically according to the filter manufacturer's instructions.
6.3. Descaling
In areas with hard water, mineral deposits (scale) can build up inside the unit, affecting performance. It is recommended to descale the unit annually or as needed by a qualified professional. This typically involves flushing the unit with a descaling solution.
6.4. Leak Inspection
Periodically inspect all plumbing connections for any signs of leaks. Address any leaks immediately to prevent water damage.
7. Troubleshooting
Before contacting customer support, review the common issues and solutions below. Always disconnect power before attempting any inspection or repair.
| Problem | Possible Cause | Solution |
|---|---|---|
| No hot water | No power to unit | Check circuit breaker. Ensure unit is plugged in securely. |
| No water flow | Water supply shut off | Ensure main water supply and unit's shut-off valve are open. |
| Water not hot enough | Low flow rate; mineral buildup | Increase flow rate if possible. Consider professional descaling. |
| Unit leaking | Loose connections; internal damage | Tighten plumbing connections. If leak persists, contact qualified technician. |
If the problem persists after attempting these solutions, contact a qualified technician or customer support.
8. Warranty Information
This Eemax Thermostatic Multi Lav Electric Tankless Water Heater comes with the following limited warranty:
- 5 Year Limited Warranty Against Leaks
- 1 Year Limited Warranty on Parts and Electrical Components
For detailed warranty terms, conditions, and claim procedures, please refer to the warranty card included with your product or visit the manufacturer's official website.
9. Customer Support
For technical assistance, parts, or warranty inquiries, please contact your retailer or the manufacturer directly. Have your model number (SPEX4208T-S) and purchase date ready when contacting support.
Note: As this product is listed under a "Generic" brand, direct manufacturer support contact information may vary. Please refer to your purchase documentation for specific support channels.





