Product Overview

Summary: This Drain Cleaning Safe Operating Procedure provides clear, step‑by‑step guidance for safely clearing blockages in drains, pipes and sewer lines across Australian workplaces. It focuses on controlling exposure to biological hazards, chemicals, confined spaces and high‑pressure equipment, helping businesses meet their WHS obligations while keeping jobs efficient and compliant.

Drain cleaning work can expose workers to a combination of high‑risk hazards: biological contaminants, hazardous gases, chemical drain cleaners, high‑pressure water jetting, rotating mechanical equipment and, in some cases, confined spaces. Without a structured procedure, tasks are often carried out informally, leading to inconsistent controls, preventable injuries, environmental incidents and potential breaches of WHS legislation. This Drain Cleaning Safe Operating Procedure sets out a clear, practical method for planning, conducting and completing drain cleaning tasks in a wide range of settings, from commercial buildings and strata complexes to industrial facilities and public infrastructure.

Developed for the Australian regulatory environment, the SOP walks your team through pre‑start checks, site assessment, isolation of services, selection and use of mechanical, chemical and high‑pressure equipment, and safe waste handling and disposal. It embeds risk assessment and PPE requirements into each stage of the job, and includes guidance on managing bystanders, working near traffic, preventing contamination and responding to emergencies such as exposure to sewage, chemical splashes or equipment failures. By implementing this document, organisations can standardise their drain cleaning practices, support competency‑based training, and demonstrate a defensible, documented approach to WHS compliance during audits, tenders and regulator inspections.

Key Benefits

• Ensure consistent, safe drain cleaning practices across all sites and teams.
• Reduce the risk of exposure to sewage, harmful microorganisms and hazardous gases.
• Minimise incidents involving high‑pressure water jetting, rotating equipment and chemical cleaners.
• Support compliance with Australian WHS legislation, Codes of Practice and relevant Australian Standards.
• Streamline training and onboarding for new staff and contractors performing drain cleaning tasks.

Who is this for?

• Maintenance Plumbers
• Facilities and Maintenance Supervisors
• Local Government Field Workers
• Civil and Drainage Contractors
• Facilities Managers
• WHS Advisors and Safety Officers
• Property and Strata Managers
• Industrial Services Technicians

Hazards Addressed

• Exposure to raw sewage and biological contaminants (bacteria, viruses, parasites)
• Inhalation of hazardous gases and vapours (hydrogen sulphide, methane, solvent fumes)
• Chemical burns and eye injuries from caustic or acidic drain cleaning products
• High‑pressure water jetting injuries, including injection and laceration
• Entanglement or contact injuries from rotating mechanical drain cleaning equipment (augers, snakes)
• Slips, trips and falls around wet, uneven or cluttered work areas
• Confined space risks in pits, manholes and sewer access chambers (oxygen deficiency, toxic atmospheres)
• Manual handling and musculoskeletal injuries from lifting covers, hoses and equipment
• Electrical hazards when using powered equipment in wet environments
• Environmental contamination from uncontrolled discharge of waste, sludge or chemicals

Included Sections

• 1.0 Purpose and Scope
• 2.0 References, Definitions and Applicable Legislation
• 3.0 Roles, Responsibilities and Competency Requirements
• 4.0 Required Tools, Equipment and Materials
• 5.0 Personal Protective Equipment (PPE) Requirements
• 6.0 Pre‑Start Planning and Risk Assessment
• 7.0 Site Preparation, Barricading and Traffic/Pedestrian Management
• 8.0 Isolation of Services and Verification of Atmosphere (Where Required)
• 9.0 Drain Inspection and Blockage Assessment
• 10.0 Mechanical Drain Cleaning Procedure (Cables, Augers, Rods)
• 11.0 High‑Pressure Water Jetting Procedure
• 12.0 Use of Chemical Drain Cleaners – Handling, Dilution and Application
• 13.0 Confined Space Entry Considerations for Pits and Manholes
• 14.0 Waste, Sludge and Contaminated Water Management and Disposal
• 15.0 Decontamination, Hygiene and Biohazard Controls
• 16.0 Post‑Task Inspection, Testing and Site Clean‑up
• 17.0 Equipment Shutdown, Cleaning and Maintenance
• 18.0 Emergency Procedures (Exposure, Spills, Gas, Equipment Failure)
• 19.0 Training, Induction and Competency Records
• 20.0 Review, Audit and Continuous Improvement

Legislation & References

• Work Health and Safety Act 2011 (Cth) and corresponding state and territory WHS Acts
• Work Health and Safety Regulations 2011 (Cth) and corresponding state and territory WHS Regulations
• Safe Work Australia – Code of Practice: Confined Spaces
• Safe Work Australia – Code of Practice: Managing the Risk of Falls at Workplaces
• Safe Work Australia – Code of Practice: Hazardous Manual Tasks
• Safe Work Australia – Code of Practice: Managing Risks of Hazardous Chemicals in the Workplace
• AS/NZS 1715: Selection, use and maintenance of respiratory protective equipment
• AS/NZS 1716: Respiratory protective devices
• AS/NZS 1337.1: Personal eye protection
• AS/NZS 2161: Occupational protective gloves
• AS/NZS 1891: Industrial fall‑arrest systems and devices (where applicable to access and work positioning)
• AS/NZS 4233.1: High pressure water jetting systems – Safe operation and maintenance
• AS/NZS 4801 / ISO 45001: Occupational health and safety management systems