MAINTAINANCE OF PLUMBING SYSTEMS

Demonstrate the correct procedure for isolating a water supply before carrying out plumbing maintenance. (8 marks)

Using appropriate tools and materials, repair a leaking PVC pipe joint. Describe each step and safety measures taken.

Clean and maintain a clogged trap under a sink. Explain the causes of clogging and preventive measures.

Perform routine inspection and maintenance on a ball valve in a storage tank. Include diagnosis of faults and corrective actions.

Replace a worn-out washer in a compression-type tap. Show all steps, tools used, and reassembly procedure.

Test and report on the functionality of a building's drainage system. Include visual inspection, water flow testing, and documentation of faults.