Hot Water - PPT 6 - Backflow prevention

What is one of the responsibilities under the Water Regulations to prevent contamination of water within a property?

• Increase water pressure

• Stop backflow

• Add more chlorine

• Reduce water usage

Which method can be used to prevent back siphonage?

• Installing a water filter

• Using an air gap

• Adding a water heater

• Increasing pipe diameter

What is an example of using an air gap in plumbing?

• Connecting two pipes directly

• Using a valve to control flow

• Separating the water level in a cistern and the discharge point

• Installing a water pump

What is the purpose of an AUK 2 air gap?

• To separate the spillover level of the appliance and the outlet point of the tap

• To increase water pressure in the tap

• To filter impurities from the water

• To reduce noise from the tap

What is the minimum air gap required on a basin for an AUK 2 air gap?

• 20mm

• 15mm

• 25mm

• 30mm

Who normally pre-sets the AUK 2 air gap on a basin?

• The appliance and tap manufacturer

• The plumber

• The homeowner

• The building inspector

What is the purpose of an AUK 3 air gap on a kitchen sink?

• To increase water pressure

• To separate the spillover level of the appliance and the outlet point of the tap

• To filter impurities from water

• To reduce noise from the tap

What is the simplest form of mechanical backflow prevention when an air gap is not possible?

• Check valve

• Air gap

• Double check valve

• Pressure vacuum breaker

What type of water is at risk from cross contamination from category 2 water?

• Saltwater

• Wholesome water

• Distilled water

• Rainwater

In the example provided, what must be used to stop hot water from entering the cold water pipe?

• Double check valve

• Single check

• Air gap

• Pressure relief valve