Plumbing level 2 - PP5 - Cold water

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

• Attach the hydraulic test bucket

• Pump system up to 1.5 x working pressure

• Slowly fill the system with water

• Leave for one hour

What should be done after filling the system with water during soundness testing for plastic pipes?

• Pump system to 1bar

• Leave for 30 minutes

• Check for pressure loss

• Walk around the system and check for leaks

What is the purpose of adding disinfectant to the system?

• To increase water pressure

• To stabilize temperature

• To clean the system chemically

• To check for leaks

What should be done if there is a pressure drop during soundness testing of rigid pipes?

• Increase the pressure

• Rectify and re-test

• Leave for another hour

• Attach the hydraulic test bucket

What is the correct pressure to pump the system to during Test A for plastic pipes?

• 1.5 x working pressure

• Manufacturer’s test pressure

• 1bar

• 2bar

What is the final step in commissioning a plumbing system?

• Adjust FOV levels in CWSC and WCs

• Complete any documentation

• Test flow rates at outlets

• Inspect insulation or pipework

What is a passive dead leg?

• A section of pipework that is isolated for a period of time

• A section of pipework that is actively used

• A section of pipework through which water cannot be drawn off or flow

• A section of pipework through which cold water has to be drawn off before hot water

What should be done before soundness testing?

• Leave for one hour

• Attach the hydraulic test bucket

• Walk around the system to make sure all joints have been made

• Pump system up to 1.5 x working pressure

What is the purpose of flushing out a new system?

• To increase water pressure

• To stabilize temperature

• To check for leaks

• To remove debris inside the pipe

What should be done if the total pressure loss is less than 0.2bar during Test B for plastic pipes?

• Rectify and re-test

• Soundness is good

• Increase the pressure

• Leave for another 120 minutes