6035DRPPT1Q2

What is the purpose of a primary ventilated stack in a soil system?

• To reduce the pressure in the system

• To aid the flow of effluent

• To increase the temperature of the system

• To filter the effluent

What must be avoided to prevent trap seal loss and effluent crossflowing up the opposite connection in a primary ventilated stack system?

• The installation of additional branch connections

• The prevention of crossflow from one connection to another

• The use of larger diameter pipes

• Regular maintenance of the stack system

If an existing branch connection to a stack is between 82-160mm, such as a WC, how should another connection be installed opposite to it to avoid crossflow?

• At the same vertical level

• 200mm lower

• No less than 200mm upwards

• At any distance as long as it is opposite

What is the maximum branch diameter allowed for a small branch connection in a primary ventilated stack system?

• 160mm

• 82mm

• 200mm

• 250mm

For the prevention of crossflow in a primary ventilated stack system, what is the minimum distance required between the center line of opposed branches?

• 82mm

• 160mm

• 200mm

• 250mm

What is the purpose of using a parallel junction in a primary ventilated stack system?

• To increase the flow rate of the waste pipe

• To overcome crossflow and allow for a connection under the 200mm restriction

• To reduce the amount of waste pipe needed

• To connect multiple waste pipes into a single stack

Where can a soil stack be located in a property?

• Only on an external wall

• Only within the property

• Either on an external wall or within the property

• Only in the loft area

How is the stack normally enclosed internally?

• With transparent covers

• In some duct work

• With insulation material

• It is not enclosed

What does the internal enclosure of the stack allow it to do?

• To be visible from outside

• To reach the loft area and either terminate or protrude out of the roof line

• To connect to the property's water supply

• To function without any connections or branches

What is the purpose of an intumescent collar in a primary ventilated stack system?

• To increase airflow within the building

• To restrict flames and smoke from travelling from one area to another

• To support the structural integrity of the building

• To provide insulation against outside temperatures