Table of Contents
What is the purpose of a thermostatic mixing valve?
Thermostatic Mixing Valve Main Purpose. Thermostatic mixing valve is a valve used for maintaining water temperature by blending cold and hot water together in constant flow to ensure safety while washing hands, taking shower and / or bathing.
What is the difference between a tempering valve and a thermostatic mixing valve?
A tempering valve is accurate to around 3℃ +/-, while a thermostatic mixing valve can keep the water to 1℃ +/- and responds faster than a tempering valve to changes in incoming water temperature.
How does a thermostatic diverter valve work?
As the element expands and contracts, it moves the slide valve (5) to correctly proportion the amount of cold and hot water entering the valve. If the cold water supply were to fail slowly over a long period of time, the valve would increasingly throttle the hot supply to maintain a safe temperature at the outlet (3).
Do I need a TMV?
TMVs are crucial for delivering hot water safely. They are designed to automatically shut down in the event of a cold water supply failure to prevent the release of scalding hot water. And they will also shut down in the event of a hot water supply shortage to prevent the potential of thermal shock.
How do you adjust the temperature on a thermostatic mixing valve?
To adjust the temperature supply remove the plastic cap on top of the valve and adjust with a close fitting spanner. To increase the temperature turn anti-clockwise To decrease the temperature turn clockwise To set the valve to a maximum recommended mixed water temperature, see table below.
What happens when a TMV fails?
In the event of cold water supply failure, the thermostatic mixing mechanism will automatically shut down the flow to prevent discharge of dangerously hot water. The flow will also be shut down in the event of a hot water supply failure to prevent thermal shock.
Do you need a TMV on a mixer tap?
However, you should not confuse a TMV with a mixer tap. While a mixer tap or shower will let you adjust the temperature of the water coming out of the tap, the TMV is directly responsible for the temperature of the hot water feed before it comes out the tap, regardless of whether it is a mixer or not.
How much does a thermostatic mixing valve cost?
Replacing a shower mixing valve costs $225 to $575 on average for materials and labor….Shower mixing valve replacement cost.
| Valve type | Valve unit cost | Total replacement cost* |
|---|---|---|
| Pressure-balancing | $50 – $300 | $150 – $600 |
| Thermostatic | $150 – $600 | $250 – $900 |
Do I need a blending valve?
Safety – One of the most important reasons that you need a blending valve on your water heater cylinder is for safety. Scalding water can cause serious burns and a blending valve reduces the temperature of the water to a safer level.