Plumbing level 2 - PP5 - Hot water

What should be inspected if the flow rate is less than the required manufacturer’s instructions?

• All of the above

• Filters cleaned

• Limescale blockages

• Temperature settings on thermostat

What can cause unbalanced pressure in manually controlled showers?

• Damaged feed pipework

• Squashed pipework

• Debris blocking the pipe

• All of the above

What should be done if an isolation valve is passing water?

• All of the above

• Dismantle valve

• Remove debris or lime scale

• Check seals on shower body

What is a common cause of leaks in plumbing systems?

• Corroded components

• All of the above

• Poor installation

• Components damaged when frozen

What should be inspected if there is expansion noise in hot water or central heating pipework?

• Notching

• Clips/brackets

• Insulation and padding

• All of the above

What is a common complaint when the CWSC is refilling after hot water has been used?

• Flow noise

• Water hammer

• Thermostat failure

• Expansion noise

What should be done if the thermostat fails closed?

• Install a pressure reducing valve

• Replace cylinder stat

• Replace immersion

• Inspect FOV and tap washer

What is a common indicator of immersion element failure?

• MCB tripping

• Fuse blowing

• All of the above

• No hot water

What should be done if there is a loss of air bubble in a single feed cylinder?

• Replace cylinder with a current approved part L cylinder

• Drain and refill the system

• Install a pressure reducing valve

• Replace immersion

What is a common cause of air locks in low pressure systems?

• Damaged pipework

• Old pipework

• High water pressure

• Incorrectly installed pipework