Sewer & Drainage SWMS Templates

Not every task, but most are. Under WHS Regulation 2025 Schedule 1 clause 291, a SWMS is mandatory whenever work involves a trench or shaft deeper than 1.5 metres, confined space entry (manholes, wet wells, septic tanks), work near pressurised gas or services, or work on telecommunications towers. Drain cleaning at a surface gully may not be HRCW, but sewer main tapping, pump station servicing, and septic pump-outs almost always are. The SWMS must be prepared before work starts and held on site.

Yes. A SWMS and a confined space entry permit are different documents serving different duties. AS/NZS 2865 and WHS Regulation 2025 Part 4.5 require a written entry permit for each confined space entry, covering atmospheric test results, isolation, standby personnel and rescue arrangements. The SWMS sits above this, documenting the broader high-risk work method, training, and PPE. Both must be in place before any worker enters a sewer manhole, wet well, septic tank or grease trap.

Continuous atmospheric monitoring is required for any confined space entry under AS/NZS 2865 and the Confined Spaces Code of Practice. Sewer atmospheres typically demand a four-gas detector calibrated for oxygen (19.5–23.5%), hydrogen sulphide (H2S), methane (LEL) and carbon monoxide. Pre-entry testing, continuous in-space monitoring, and bump testing before each shift must be documented in the SWMS and entry permit. H2S above 10 ppm requires immediate withdrawal and reassessment of ventilation controls.

SWMS content is governed by the model WHS Regulations (now WHS Regulation 2025) adopted in most jurisdictions, so a single well-written SWMS is generally compliant nationally — except in Victoria and Western Australia, which operate under modified frameworks. Victoria uses equivalent High Risk Construction Work provisions under OHS Regulations 2017, and licensed plumbing work is additionally regulated by state plumbing authorities. Always confirm the principal contractor's site-specific requirements and your jurisdiction's plumbing licensing rules before commencing.

Hydrojetting introduces stored-energy, biological and ergonomic hazards. SWMS controls should reference WHS Regulation 2025 Part 3.1 (managing risk), include manufacturer pressure ratings, dead-man trigger requirements, whip-check restraints on couplings, anti-recoil heads, and full-face splash PPE rated for biohazard exposure. Operators need documented training, and the work area must be cordoned to prevent bystander exposure to aerosolised effluent. Vaccinations (Hepatitis A, tetanus) and post-task decontamination procedures should also be specified.