1. Product Overview
The CLAGE MPH3 is a compact, pressure-resistant instantaneous electric water heater designed to provide hot water efficiently at a single draw-off point, such as a washbasin. Its hydraulic control system and bare wire heating technology ensure immediate hot water without energy storage, making it an economical choice for specific applications. The unit is designed for under-sink installation and features a replaceable heating cartridge for extended lifespan and reduced limescale buildup.

Image 1: Front view of the CLAGE MPH3 Instantaneous Water Heater, a compact white unit suitable for under-sink installation.
2. Safety Instructions
Please read all safety instructions carefully before installation and operation. Failure to follow these instructions may result in electric shock, fire, property damage, or personal injury.
- Professional Installation: Installation and electrical connection must be performed by a qualified professional in accordance with local regulations and standards.
- Electrical Supply: Ensure the electrical supply matches the unit's requirements (230 V, 15 A, 1.5 mm² cable cross-section).
- Water Pressure: The unit is pressure-resistant, with an allowed operating overpressure of 1 MPa (10 bar). Ensure your water system operates within these limits.
- Frost Protection: Do not install the unit in locations where there is a risk of freezing.
- Maintenance: Disconnect the power supply before performing any maintenance or cleaning.
3. Package Contents
Upon unpacking, please verify that all components are present and undamaged. The standard package includes:
- CLAGE MPH3 Instantaneous Water Heater unit
- Connection kit (for faucet renovation)
- Jet regulator for M 22/24 × nozzle
- User Manual
Note: Flexible connection hoses and T-pieces are not included and must be purchased separately if required for your installation.
4. Installation
Installation should only be carried out by a qualified plumber or electrician.
- Mounting Location: Choose a suitable under-sink location, ensuring sufficient space for the unit and connections. The unit is designed for under-counter installation.
- Water Connection: Connect the water inlet and outlet pipes. The unit is suitable for both pressure-resistant and pressureless fittings. Ensure all connections are watertight.
- Electrical Connection: Connect the unit to a dedicated 230 V, 15 A electrical circuit. The required cable cross-section is 1.5 mm². Ensure proper grounding.
- Faucet Installation: Install the faucet and, if applicable, the included jet regulator (M 22/24 ×) to optimize water flow and efficiency.
- Bleeding the System: Before switching on the power, open the hot water tap to allow water to flow through the unit until all air is expelled from the system.
5. Operation
The CLAGE MPH3 instantaneous water heater operates automatically once properly installed and connected to power and water.
- Automatic Heating: When the hot water tap is opened, the unit's full heating power activates automatically as water flows through it.
- Adjustable Flow: The adjustable and economical flow rate ensures maximum efficiency and desired water temperature. Adjust the flow at your faucet to achieve the preferred temperature.
- Energy Efficiency: The unit only consumes energy when hot water is being drawn, preventing standby losses.
6. Maintenance
Regular maintenance ensures optimal performance and longevity of your CLAGE MPH3 water heater.
- Heating Cartridge: The IES bare wire heating system features a replaceable heating cartridge. This design extends the unit's lifespan, reduces limescale buildup, and simplifies maintenance. Consult a professional for replacement if needed.
- Cleaning: The removable signal panel provides access to the central plug and water quantity adjustment. This allows for easier cleaning and inspection of internal components.
- Limescale: In areas with hard water, regular descaling may be necessary to maintain efficiency. This should be performed by a qualified technician.
- External Cleaning: Clean the exterior of the unit with a damp cloth. Do not use abrasive cleaners or solvents.
7. Troubleshooting
If you experience issues with your CLAGE MPH3, refer to the following common troubleshooting steps. For complex problems, contact a qualified technician.
- No Hot Water:
- Check if the power supply is connected and the circuit breaker has not tripped.
- Ensure water is flowing through the unit when the tap is open.
- Verify that the water pressure is adequate.
- Insufficient Hot Water Temperature:
- Reduce the water flow rate at the tap to allow the unit more time to heat the water.
- Check for limescale buildup, which can reduce heating efficiency.
- Water Leakage:
- Immediately turn off the water supply and power to the unit.
- Inspect all connections for tightness. Contact a professional if the leak persists.
8. Technical Specifications
| Feature | Specification |
|---|---|
| Model | MPH3 |
| Nominal Power | 3.5 kW |
| Voltage | 230 V |
| Nominal Current | 15 A |
| Required Cable Section | 1.5 mm² |
| Dimensions (H x W x D) | 13.5 x 18.6 x 8.7 cm |
| Weight | 1.5 kg |
| Allowed Operating Overpressure | 1 MPa (10 bar) |
| Switch-on Water Quantity / Max. Flow | 1.38 / 2.0 l/min |
| Protection Class | IP 25 |
| Energy Efficiency Class | A |
| GTIN / UPC | 010436160339 |
9. Warranty and Support
For warranty information, please refer to the documentation provided with your purchase or contact your retailer. For technical support or service, please contact CLAGE customer service or your authorized service partner. Ensure you have your product model and serial number available when contacting support.







