Unit 316 Session 8a Anti legionella valves

​What are anti-legionella valves and why and how should you install them?

​Use the link below read over the website content and answer the following questions:

​https://www.reliancevalves.com/gb/en/resources/blog/what-are-anti-legionella-valves-and-how-install

Multiple Choice

What is the purpose of anti-legionella valves?

• To prevent scalding in plumbing systems

• To prevent Legionella bacteria from forming in plumbing and heating systems

• To increase the flow temperature in heating systems

• To reduce the water pressure in plumbing systems

Multiple Choice

What is Legionnaires disease?

• A type of respiratory illness caused by inhaling dust particles

• A type of atypical pneumonia caused by inhaling droplets of water containing Legionella bacteria

• A type of skin infection caused by scalding water

• A type of lung infection caused by inhaling steam from hot water

Multiple Choice

What change has been made to Part L of the Building Regulations regarding flow temperatures in heating systems?

• The flow temperature can no longer exceed 70°C

• The flow temperature can no longer exceed 60°C

• The flow temperature can no longer exceed 50°C

• The flow temperature can no longer exceed 40°C

Multiple Choice

Where is Legionella bacteria most likely to form in plumbing systems?

• Plumbing systems with constant water flow

• Underfloor heating systems

• Cooling towers and hot water systems

• Room-air humidifiers and central air condition systems

Multiple Choice

What is the first step recommended by COSHH to prevent Legionella bacteria?

• Keep all systems above 60°C

• Install WRAS-approved anti-legionella valves

• Install anti-vacuum valves

• Keep all systems below 20°C

Multiple Choice

What is the purpose of an anti-legionella valve?

• To increase water pressure in plumbing systems

• To prevent Legionella bacteria from forming in plumbing and heating systems

• To reduce the flow temperature in heating systems

• To regulate the water flow in underfloor heating systems

Multiple Choice

What is the recommended frequency for servicing anti-legionella valves?

• Every 6 months

• Every year

• Every 2 years

• Every 5 years

Multiple Choice

What is the purpose of the paddle retaining tube in the installation of an anti-legionella valve?

• To prevent the formation of Legionella bacteria

• To increase the water pressure in the expansion vessel

• To regulate the flow temperature in heating systems

• To connect the valve to the expansion vessel

Multiple Choice

What should be checked before installing an anti-legionella valve?

• The type of water meter used

• The system pressure and temperature

• The color of the expansion vessel

• The size of the paddle retaining tube

Multiple Choice

What is the purpose of the rotating tee-piece in the installation of an anti-legionella valve?

• To provide flexibility in installation

• To increase the water pressure in the expansion vessel

• To prevent the formation of Legionella bacteria

• To connect the valve to the expansion vessel

Multiple Choice

What is the recommended temperature range to prevent the build-up of Legionella bacteria?

• Below 15°C or above 65°C

• Below 30°C or above 50°C

• Below 20°C or above 60°C

• Below 10°C or above 70°C

Multiple Choice

What is the alternative to installing a flow-through expansion vessel to prevent Legionella bacteria?

• Pressure reducing valves

• Anti-vacuum valves

• Anti-scald valves

• WRAS-approved anti-legionella valves

Multiple Choice

What is the purpose of the inbuilt isolating valve in the anti-legionella valve from Reliance Valves?

• To shut off the water flow for maintenance

• To increase the water pressure in the expansion vessel

• To prevent the formation of Legionella bacteria

• To provide flexibility in installation

Multiple Choice

What is the benefit of using WRAS-approved anti-legionella valves?

• They prevent the formation of Legionella bacteria

• They eliminate the need for regular servicing

• They increase the flow temperature in heating systems

• They reduce the water pressure in plumbing systems