Types of systems - Secondary ventilated stack

What does the secondary vent allow in a secondary ventilated stack system?

• Additional airflow and safeguards against pressure fluctuations

• Water drainage

• Electrical wiring

• Heating

What is the name of the system shown in the diagram?

• Secondary ventilated stack

• Primary drainage system

• Direct downpipe system

• Single stack system

Which part in the diagram is used for cleaning and maintenance access?

• Rodding eye

• Inspection chamber

• Gully trap

• Manhole cover

In what type of buildings is the ventilated branch system most likely to be used?

• Small residential homes

• Public buildings, hotels, hospitals

• Industrial factories

• Schools

Fill in the blank: Each branch in a ventilated branch system is ventilated no more than ____ from the appliance.

• 750mm

• 500mm

• 1000mm

• 1500mm

The ventilated branch system allows additional airflow only in the main stack.

• True

• False

What is the main purpose of ventilating each discharge branch in a ventilated branch system?

• To reduce water usage

• To safeguard against any positive or negative pressure fluctuations

• To increase the temperature

• To reduce installation costs

Refer to the diagram of the Ventilated branch system. The ________ is used to clear blockages in the system.

• Rodding eye

• Vent pipe

• Trap

• Overflow pipe

Refer to the diagram of the Ventilated branch system. Match the following parts to their correct function:

• Allows air to circulate in the branch pipes

• Allows air to circulate in the branch pipes

• Removes waste water from the building

• Provides access for clearing blockages

• Provides access for clearing blockages

• Removes waste water from the building

As shown in the illustration on the previous slide, the discharge branches migrate ______ allowing the effluent to discharge. Fill in the blank.

• downwards

• upwards

• sideways

• randomly