Truma Ultrastore Safety Drain Valve 2.8bar

The valve protects your Truma water heater from frost damage. If the surrounding temperature drops to approximately 3°C, it automatically opens and drains the boiler, preventing water inside from freezing and damaging the tank. Once the temperature rises above approximately 7°C, the valve can be reset and the system refilled.

The most common reason is that the temperature around the valve is still too cold. The valve is designed not to latch closed until the surrounding temperature is above approximately 7°C. Gently warming the area inside the vehicle usually allows it to reset. If the area is warm and the button still won't stay down, the valve may require replacement.

Continuous draining usually indicates one of the following:

• The frost protection valve has activated.
  
• The valve has not been fully reset.
  
• The valve has become worn or faulty.
  
• System pressure exceeds the valve rating.
  

Checking the ambient temperature and system pressure should be your first step before replacing the valve.

No. This version is intended for Truma Ultrastore water heaters using 10mm flexible hose connections. If your system uses 12mm John Guest push-fit pipe, you'll need the push-fit version.

This model is designed for 10mm flexible water hose secured with hose clips. It is not the push-fit version.

The valve is designed for pumps with a maximum pressure of 2.8 bar. If your pump produces more than this, Truma recommends fitting a pressure reducer to protect the boiler and safety valve.

Yes, provided the pump's maximum pressure does not exceed 2.8 bar, or a suitable pressure reducer is installed. Many popular caravan and motorhome pressure pumps operate within this range.

As water heats, it expands and pressure increases. Occasional discharge can occur if pressure rises too high. Persistent dripping may indicate excessive pump pressure, thermal expansion issues, or a worn valve requiring replacement.

Older Truma systems used a red 2.5 bar valve. This yellow 2.8 bar valve (70141-02) is the current replacement and is commonly used as the updated genuine Truma part for compatible Ultrastore boilers.

No. The valve is entirely mechanical. Frost protection operates automatically using a temperature-sensitive mechanism, even if the vehicle has no battery power.

Typical signs include:

• Water leaking continuously from the drain outlet.
  
• The yellow button will not remain closed in warm conditions.
  
• Cracks in the valve body.
  
• Water escaping from the valve during normal use.
  
• Failure to drain the boiler during freezing conditions.