Plumbing level 2 - PP6 - Hot water

What should be done before starting soundness testing?

• Attach the hydraulic test bucket

• Pump system up to working pressure

• Check for open ends and tight joints

• Fill the system with water

What is the first step in soundness testing for rigid pipes?

• Leave for one hour

• Slowly fill the system with water

• Check for any pressure drop

• Pump system up to 1.5 times the working pressure

For plastic pipe soundness testing (Test A), what should the pressure be increased to after 45 minutes?

• 1.5 times working pressure

• Manufacturer’s test pressure

• 1 bar

• 2 times working pressure

In plastic pipe soundness testing (Test B), what is the acceptable total pressure loss after 120 minutes?

• Less than 0.1 bar

• Less than 0.2 bar

• Less than 0.3 bar

• Less than 0.4 bar

What should be done after filling the system with water during flushing and disinfecting?

• Add disinfectant to system

• Open all draw-off points

• Drain system from the lowest point

• Test chlorine levels at each outlet

What is the purpose of adding disinfectant to the system during flushing and disinfecting?

• To stabilize temperature

• To check for leaks

• To disinfect the pipes

• To remove debris

What should be done to ensure correct operation of blending valves?

• Flush through as per BS6700

• Test chlorine levels

• Check for leaks

• Ensure correct temperature is set and recorded

What is the first step in decommissioning a hot water system?

• Cap open ends

• Drain system to a safe location

• Inform the customer

• Remove fuses

What should be done after isolating the heat source during decommissioning?

• Check for leaks

• Test chlorine levels

• Refill the system

• Place a warning notice on the heat source

What is a common item that may need periodic maintenance or replacement?

• Hot water cylinder

• Blending valves

• Thermostats

• Pressure gauge