What is the standard size of the MDPE water supply for most domestic installations?

• 20mm

• 25mm

• 30mm

• 35mm

What determines the pipe size after the MDPE water supply enters the building?

• The color of the pipes

• The type of flooring

• The appliances and components installed

• The height of the building

What should be carried out to determine the exact pipe size required?

• Pipe coloring

• Pipe sizing

• Pipe cleaning

• Pipe painting

What size of pipework is generally used in direct systems for cold water outlets?

• 10mm

• 15mm

• 20mm

• 25mm

In what type of installations is a 15mm rising main sufficient?

• Large installations with multiple en-suite bathrooms

• Small installations with a combination boiler

• Industrial installations

• Installations with multiple shower rooms

Where does the cold water rising main terminate in an open vented hot water storage system?

• In the basement

• In the kitchen

• In the roof space

• In the bathroom

What must the water storage capacity of the cistern be in relation to the hot water storage vessel?

• Less than the hot water storage vessel

• Equal to or greater than the hot water storage vessel

• Twice the hot water storage vessel

• Half of the hot water storage vessel

What is the minimum size of the cold water rising main required for an unvented hot water storage system?

• 15mm

• 18mm

• 22mm

• 25mm

Why do unvented hot water storage systems require a larger size pipe?

• To reduce installation costs

• To increase water temperature

• To achieve a greater flowrate

• To decrease water pressure

What happens to the number of outlets when hot water is supplied directly from the mains cold water supply through a mains pressure hot water heater?

• The number of outlets is halved.

• The number of outlets remains the same.

• The number of outlets is effectively doubled.

• The number of outlets is reduced by a quarter.