Cistern Installation Quiz

What is the minimum capacity of a cold-water cistern for a small house as per BS EN 806?

• 50–100 litres

• 100–150 litres

• 150–200 litres

• 200–250 litres

Where should the float-operated valve (inlet) be positioned in relation to the outlet to avoid stagnation?

• Above the outlet

• Below the outlet

• Opposite the outlet

• Next to the outlet

What standard must the float-operated valve comply with?

• BS 1205

• BS 1212 Part 2 (brass) or Part 3 (plastic)

• BS 1312 Part 3 (steel)

• BS 1215

What is the purpose of the insect screen?

• To allow ventilation

• To prevent debris from entering

• To prevent insect access and contamination

• To provide structural support

How much clearance is required above the cistern lid for maintenance?

• 200 mm

• 250 mm

• 300 mm

• 350 mm

Why should ceiling insulation be removed from beneath the cistern?

• To prevent the cistern from freezing

• To prevent insect entry

• To allow heat from the room below to warm it slightly

• To avoid structural damage

How can stagnation in linked cisterns be prevented?

• By using a screened vent

• By having the inlet in one cistern and the outlet in another

• By placing the cisterns side by side

• By insulating both cisterns

What is the maximum temperature cold water cisterns should not exceed to prevent Legionella growth?

• 15°C

• 20°C

• 25°C

• 30°C

What is the recommended method for drilling holes in the cistern?

• Using a manual drill

• Using a hole saw

• Using a spade bit

• Using a hammer drill

What is the purpose of a warning pipe in a cistern?

• To supply additional water

• To indicate a problem and prevent insect entry

• To connect linked cisterns

• To provide ventilation