Do I have to book a drainage audit when installing a septic tank or aerobic treatment unit?
• No, a drainage audit is not required if an on-site waste disposal unit is being installed as this work falls outside of the jurisdiction of the Plumbers Licensing Board and is the responsibility of the local government authority. However, the associated drainage plumbing work will need to be audited by a plumbing compliance officer and the requirement to book a drainage audit applies to the associated drainage plumbing work. • Who are inspecting my drainage plumbing work and what will they be looking at? • Plumbing compliance officers under the direction of the Plumbers Licensing Board are responsible for auditing all plumbing work. For drainage plumbing the audit would normally include an examination of the following features: • Drain venting • Approved materials • Gradient • Backfill material • Pipe sizing • Surcharge protection • Drain connection point • Bedding and bedding materials • Cover requirements • Infiltration protection • Support • Pits and inspection chambers • Who are
