Hot Water Systems Quiz L3P2U6,1.8;2

What is the purpose of the D1 discharge pipework in a hot water system?

• To remove water from the expansion relief valve

• To remove water from the temperature relief valve

• To remove water from the pressure relief valve

• To remove water from both the pressure relief valve and the temperature relief valve

What are the two sections of the discharge pipework separated by?

• A storage vessel

• A manifold

• A safety device

• A tundish

According to the Regulations, what should the D1 pipework be made of?

• Plastic

• Cross-linked polyethylene

• Polybutylene

• Metal

What is the maximum length of the D1 pipework?

• 300mm

• 500mm

• 400mm

• 600mm

What is the main requirement of the D2 pipework?

• To be made of metal

• To be made of plastic

• To be visible at the tundish

• To have a fall of at least 1:200

How much pipe must be showing on the D2 pipework below the tundish before any changes of direction?

• 400mm

• 200mm

• 300mm

• 100mm

What is the maximum termination distance of D2 low level discharge above the ground?

• 100mm

• 125mm

• 75mm

• 50mm

What fall is required on the D2 pipework?

• 1:250

• 1:200

• 1:150

• 1:100

What is the reason for using waterless traps on soil stack terminations?

• To ventilate foul air from the drain

• To connect sanitary appliances

• To allow water into the branch pipe

• To prevent foul smells

What is the termination distance of a high level discharge onto a roof with plastic gutters?

• 1m

• 2m

• 3m

• 4m