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What is the minimum diameter of any ventilating pipe in a secondary ventilated stack system?

• 25mm

• 32mm

• 75mm

• 15mm

What must the diameter of a ventilating pipe be increased to if it is longer than 15m in a secondary ventilated stack system?

• 25mm

• 32mm

• 75mm

• 15mm

What is the minimum diameter of the main ventilating stack or any dry part of the primary ventilating stack?

• 25mm

• 32mm

• 75mm

• 15mm

In a secondary ventilated stack system, where must the ventilating pipe rise away from?

• The discharge stack

• The spillover level of the appliance

• The main discharge stack

• The branch discharge pipe

In a secondary ventilated stack system, where must the ventilating pipe rise away from before connecting to the discharge stack?

• Below the spillover level of the appliance

• Above the spillover level of the appliance

• At the same level as the spillover level of the appliance

• At the base of the appliance

What is the minimum diameter of the main ventilating stack or any dry part of the primary ventilating stack in a secondary ventilated stack system?

• 25mm

• 32mm

• 75mm

• 15mm

Why are secondary ventilated stack systems commonly seen in existing multi-occupancy buildings?

• They are cheaper to install

• They require less maintenance

• They allow for more flexible location of appliances

• They provide better water pressure

What diameter should the main discharge stack be for buildings up to five storeys, according to the general guide?

• 50mm

• 100mm

• 150mm

• 200mm

For buildings of up to how many storeys is a 150mm diameter stack required?

• 5 storeys

• 10 storeys

• 20 storeys

• 25 storeys

What does a group of appliances consist of in the context of multi-occupancy dwellings?

• One WC, one shower, one basin, and one bidet

• One WC, one bath, one basin, and one bidet

• One WC, one bath, one basin, and one sink

• One WC, two basins, and one sink