What is the function of thermostatic valve Legionella?

What is the function of thermostatic valve Legionella?

TMVs are valves using temperature sensitive elements to blend hot and cold water to produce water at a temperature to safeguard against scalding. Blended water downstream of a TMV may provide an environment in which legionella can multiply thereby increasing the risk of exposure.

What is the function of tempering valve?

A tempering valve mixes hot and cold water to create water at the perfect temperature to distribute to sinks and showers. They are typically used in hotels or office buildings, anywhere where there is centralized delivery of hot water. If the water delivered is too warm, scalding can occur.

What temperature prevents Legionnaires Disease?

Hot water should be stored at 60 °C at least in order to kill legionella bacteria.

What temperature should a blending valve be?

As hot and cold water enters the mixing valve it is carefully blended using an internal thermal element to output a mixed water stream at a pre- set temperature that is typically between 39°C and 43°C. This is the recommended temperature range for hot water outlets where a TMV is installed.

How long should you flush taps for legionella?

When you first move into your home, run the bath and hand basin taps continuously for at least five minutes. This will flush through any bacteria. If your shower has not been used for a week or more, run water from both hot and cold supplies through the shower hose and showerhead for two minutes.

Where is a tempering valve?

Where is the Tempering Valve Located? Most tempering valves are installed at the hot water system. Alongside the tempering valve, isolating valves, line strainers and check valves must also be installed at the cold and hot water inlets. Depending on the water pressure, pressure reducing valves might also be required.

Where do you put a tempering valve?

Tomson 5213 series tempering valves are designed to be typically installed at the hot water storage heater. In order to ensure a set temperature, the tempering valve must have a minimum flow rate of 4 l/min.

How often should outlets be flushed to prevent Legionella?

To reduce the risk you should remove dead legs/dead ends in pipe-work, flush out infrequently used outlets (including showerheads and taps) at least weekly and clean and de-scale shower heads and hoses at least quarterly.

What is the most common way to contract Legionnaires disease?

Most people catch Legionnaires’ disease by inhaling the bacteria from water or soil. Older adults, smokers and people with weakened immune systems are particularly susceptible to Legionnaires’ disease.

Are mixing valves mandatory?

Yes, when you replace a tank type water heater you must satisfy OBC Article 7.6. 5.1. Tankless water heaters do not require a mixing valve, as long as the controller cannot be adjust higher than 120F.