According to the Building Regulation Approved Document Part H, where should a branch pipe discharging to a gully terminate?

• Below the water seal

• Above the water seal

• Below the grating or sealing plate and above the water level

• Outside the gully area

What is the minimum diameter of pipework required for connecting condensate drainage from boilers to sanitary pipework?

• 22mm

• 75mm

• 50mm

• 100mm

What needs to be installed at the base of a soil stack to allow effluent to maintain its velocity when changing from a vertical to a horizontal movement?

• A) A short radius bend

• B) A straight connector

• C) A long radius bend

• D) No bend is required

Why did older systems that did not have a long radius bend cause problems?

• A) They were too expensive to install

• B) They caused problems with compression or back pressure for the discharge

• C) They were not compatible with modern piping

• D) They increased the velocity of the effluent too much

What is sometimes used instead of a long radius bend in some systems?

• A) Three 30° connectors

• B) Two 45° connectors

• C) A single 90° connector

• D) A flexible hose

What type of discharge system can be installed to reduce the risk of losing a trap seal on a larger installation?

• Gravity discharge system

• Ventilated branch discharge system

• Direct discharge system

• Indirect discharge system

How far should a vent pipe be located from any appliance to protect water trap seals from induced or self-siphonage?

• No more than 50mm

• No more than 75mm

• No more than 750mm

• No more than 1000mm

What is the purpose of air admittance valves (AAV)?

• To allow the foul odours of the drain to escape into a dwelling

• To prevent air from entering a system

• To allow air into a system but prevent foul odours from escaping

• To seal the system completely from air and odours

What is the function of the rodding eye in a sanitary pipework system?

• To provide a method for clearing blockages

• To increase water flow speed

• To measure water pressure

• To regulate water temperature

Which component are directly connected to the main discharge stack in a ventilated branch discharge system?

• Branch discharge pipe

• Branch ventilating pipe

• Rodding eye

• Main ventilating stack