Unit 09 – Sanitation systems – Phase 1 1.1

What are the three sections of sanitary pipework?

• The wet pipe, the dry pipe, and the waste pipe

• The primary stack, the secondary stack, and the branch stack

• The main pipe, the secondary pipe, and the discharge pipe

• The soil pipe, the vent pipe, and the waste pipe

Which type of stack is commonly used in domestic buildings?

• Ventilated Branch Discharge Stack

• Stub Stack

• Secondary Ventilated Stack

• Primary Ventilated Stack

What is the purpose of a secondary ventilated stack?

• To connect appliances to the main stack

• To carry waste away from the dwelling

• To prevent positive and negative pressure fluctuations

• To dispose of waste water from baths and sinks

In which situations would a ventilated branch discharge system be used?

• In domestic buildings with closely grouped appliances

• In high rise buildings with pressure fluctuations

• In larger installations with many appliances

• In small groups of appliances connected directly to a drain

What can be fitted to a stub stack to allow ventilation?

• Vent Pipe

• Water Trap

• Waste Pipe

• Air Admittance Valve

Which document sets the requirements for sanitary appliances?

• Both of the above

• British Standard BS EN 12056: 2000 pts 1 to 5

• Approved Document H of the 2013 Building Regulations

• None of the above

What is the minimum size of a ventilating pipe to any single appliance?

• 15mm

• 25mm

• 32mm

• 40mm

What is the maximum length of a washbasin waste pipe?

• 1.7m

• 3m

• 6m

• 10m

What is the minimum diameter of the main ventilation stack?

• 60mm

• 100mm

• 75mm

• 50mm