AC 2.1 Part 1 Cold Water Supply Systems in the UK

What is the most common system of cold water supply in use in the UK?

• Indirect System

• Direct System

• Gravity System

• Pumped System

When is the storage of cold water required?

• When the hot water supply is from a high pressure system.

• When the hot water supply is from a low pressure hot water storage vessel.

• When the cold water supply is from a high pressure system.

• When the cold water supply is from a low pressure system.

What is the diameter of the cold feed to the secondary hot water system?

• 15mm

• 22mm or 28mm

• 10mm

• 30mm

What type of valve is fitted to the W.C. cistern according to the diagram?

• Pressure relief valve.

• Spherical ball type service valve.

• Float operated valve.

• Gate valve.

What is the main advantage of not having water pipes or cisterns in the roof space?

• Reduced installation cost.

• No risk of burst pipes due to freezing.

• Easier access for repairs.

• Increased water pressure.

What is the first appliance off the cold water main in the system?

• Washing machine.

• Combi boiler or Instantaneous hot water heater.

• Dishwasher.

• Refrigerator.

In an indirect system of cold water supply, which appliance is supplied directly from the water main?

• Bath

• Washbasin

• Kitchen sink

• WC

What is the purpose of the cold distribution pipe work in the diagram?

• To supply hot water

• To reduce water pressure

• To feed the bath, washbasin, and W.C.

• To drain excess water

According to BS8558, what factor determines the amount of cold water required?

• The size of the cistern

• The height of the installation

• The number of occupants

• The temperature of the water

What is the effect of installing the cistern higher?

• Decreases system pressure

• Increases system pressure

• Reduces water temperature

• Increases water temperature