Plumbing level 2 - PP1.2 - Drainage

What is the purpose of a secondary vent in a secondary ventilated stack?

• To prevent rainwater from entering

• To allow effluent to discharge

• To allow additional airflow and safeguard against pressure fluctuations

• To connect multiple appliances

In a ventilated branch system, how far from the appliance should each branch be ventilated?

• 500mm

• 750mm

• 1 meter

• 1.5 meters

What is the minimum size of a branch ventilating pipe for multiple appliances?

• 25mm

• 32mm

• 75mm

• 50mm

What is the acceptable way to terminate a soil stack inside a building according to Building Regulations?

• By installing a stub stack

• By installing a weather collar

• By installing an air admittance valve

• By installing a vent cowl

At what height must an air admittance valve be installed above the highest spillover level?

• 2 meters

• 1.5 meters

• 1 meter

• 0.5 meters

What is the maximum distance a stub stack can be installed away from the main vented stack?

• 4 meters

• 6 meters

• 3 meters

• 5 meters

If a soil stack terminates outside the property and is within 3 meters of an opening window, how high should it be installed above the window?

• 900mm

• 1 meter

• 750mm

• 500mm

What is the main purpose of grey water recovery?

• To discharge water to the main sewer

• To filter and clean drinking water

• To reuse water from washbasins, showers, washing machines, and baths

• To store rainwater

Which system is favored by local authorities for below ground drainage?

• Combined system

• Stub stack system

• Separate system

• Partially separate system

What is a soakaway pit used for in a partially separate system?

• To naturally disperse rainwater in the ground

• To discharge foul water

• To connect multiple appliances

• To store grey water