Confined vs. Restricted Spaces: What Aussie Plumbers Need to Know
Confined vs. Restricted Spaces: What Aussie Plumbers Need to Know
For plumbers, understanding the difference between confined spaces and restricted spaces isn’t just about ticking off safety requirements—it’s about staying safe on the job. Whether you're working in pits, tanks, or tight crawl spaces, knowing the risks and following the right procedures can prevent serious accidents. Let’s break it down.
What Is a Confined Space?
A confined space is an area that:
- Is enclosed or partially enclosed – Think sewer systems, stormwater pits, tanks, or large pipelines.
- Isn’t designed for people – These spaces are built for water flow or storage, not for ongoing work.
- Has serious hazards, such as:
- Oxygen levels that are too high or too low.
- Dangerous gases or fumes that can cause suffocation or loss of consciousness (e.g., hydrogen sulfide in sewer systems).
- A risk of fire or explosion from flammable gases.
- A risk of being trapped, engulfed, or drowned by water or debris.
Once a space is classified as a confined space, it stays that way unless the hazards are permanently removed. Temporary measures like better ventilation or gas testing don’t change its classification—they’re just essential controls to help keep workers safe.
How to Work Safely in a Confined Space
Because confined spaces are high-risk work areas, strict rules apply under Australian workplace health and safety laws. Before entering, plumbers must ensure:
- A Safe Work Method Statement (SWMS) is in place – Essential for high-risk work.
- An entry permit is obtained – No permit, no entry.
- A rescue plan is in place – Must be rehearsed and ready in case something goes wrong.
- Air testing is conducted – Oxygen levels and gas hazards must be checked before and during entry.
- A stand-by person is present – A trained team member must stay at the entrance to monitor and communicate.
- Proper training is completed – Anyone working in confined spaces must have accredited training, such as Confined Space Entry or Breathing Apparatus courses.
Additional controls may be required depending on the specific risks present.
What Is a Restricted Space?
A restricted space isn’t as high-risk as a confined space, but it still presents challenges. These spaces:
- Have difficult access – Think tight crawl spaces, underfloor plumbing areas, or narrow service tunnels.
- Are tight on space – There may not be enough room to work comfortably or use tools effectively.
- Can contain other hazards – Like dust, mould, asbestos, or hazardous chemicals.
While restricted spaces don’t require an entry permit or rescue plan, they still need careful risk assessment and proper safety measures to prevent slips, trips, and physical strain.
Key Differences for Plumbers
The key difference is that confined spaces always remain classified as such due to their inherent hazards, even when controls are in place. Restricted spaces, on the other hand, don’t have the same air quality risks or risk of engulfment but still need proper risk management.
Need Expert Advice?
Not sure if a space you’re working in is classified as confined or restricted? If you’re a HazardCo member, our qualified Health & Safety advisors can help you assess the situation and ensure you're meeting Australian plumbing safety requirements.
Call us on 1800 954 702 or visit HazardCo for Reece Plumbers to simplify your health and safety with expert guidance.
