Is an under-floor crawl space a confined space?

Only if it meets the definition: not designed for occupancy, restricted entry, and a risk like engulfment or a harmful atmosphere. Many crawl spaces fail the atmosphere test after glue or gas work. If it qualifies, entry needs a permit, testing and a standby — a SWMS alone is not enough.

Do I need a SWMS to connect gas appliances?

Work near pressurised gas distribution mains or consumer piping is a high-risk category. Routine appliance swaps on an isolated line are argued both ways — but writing the SWMS is faster than the argument, and principal contractors will ask for it on any construction site.

What depth of trench can I enter without support?

The category line is 1.5 metres, but soil can kill at less — regulators prosecute collapses in shallower trenches under the general duty. The SWMS should record the competent person's ground assessment for anything a worker enters, whatever the depth.

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Plumbing SWMS template

Water, sewer and gas plumbing including excavation and confined areas.

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Plumbing quietly collects high-risk categories: trenches for drainage runs, confined spaces in pits and under-floor voids, pressurised gas infrastructure, and the biological load of live sewer work. A plumbing SWMS that only mentions manual handling has missed the point of the trade.

This template covers rough-in and drainage plumbing: locating services, excavation, pipework installation, pressure testing and gas connections. It is built so the categories that apply on your specific job — and only those — end up in the document.

What this SWMS covers

The typical scope of work the document describes, step by step. The builder lets you add, remove and reword steps so the sequence matches your actual job.

1Arrive and inspect site
2Locate services
3Set up work area
4Excavate or open up wall/floor
5Install pipework and fittings
6Pressure test
7Reinstate and clean up

Hazards and example controls

The controls below are starting points ordered by the hierarchy of control — the builder helps you adapt them to the site and add your own.

Trench collapse in drainage excavations

Benching, battering or shields for trenches people enter beyond 1.5 m
Spoil back from the edge; ladder access into the trench
Inspect after rain before re-entry

Confined space entry (pits, tanks, under-floor voids)

Confirm whether the space meets the confined space definition
Entry permit, atmospheric testing and standby person where it does
Never enter to rescue without the rescue plan being followed

Gas work — leaks and ignition

Licensed gasfitter only; isolate and purge before cutting lines
Test for leaks with detection fluid or instrument after work
No ignition sources during purging

Sewage contact and biological exposure

Waterproof gloves and eye protection for live sewer work
Wash-up facilities before eating; cover cuts before work
Hepatitis A/B vaccination offered for regular sewer workers

High risk construction work

Confined spaces
Work near pressurised gas infrastructure

Drainage trenches beyond 1.5 metres deep trigger the excavation category; pits and voids can trigger confined spaces; gas connections trigger work near pressurised gas infrastructure. Add mobile plant when an excavator digs the run. Few trades swing between 'no categories' and 'four categories' as often as plumbing — assess each job.

All 18 high-risk categories explained

Common questions

Is an under-floor crawl space a confined space?: Only if it meets the definition: not designed for occupancy, restricted entry, and a risk like engulfment or a harmful atmosphere. Many crawl spaces fail the atmosphere test after glue or gas work. If it qualifies, entry needs a permit, testing and a standby — a SWMS alone is not enough.
Do I need a SWMS to connect gas appliances?: Work near pressurised gas distribution mains or consumer piping is a high-risk category. Routine appliance swaps on an isolated line are argued both ways — but writing the SWMS is faster than the argument, and principal contractors will ask for it on any construction site.
What depth of trench can I enter without support?: The category line is 1.5 metres, but soil can kill at less — regulators prosecute collapses in shallower trenches under the general duty. The SWMS should record the competent person's ground assessment for anything a worker enters, whatever the depth.

Build your plumbing SWMS now

Start from this template and answer a few questions about the job — state, site, crew, method. Preview the whole document free; pay only when you download the PDF.

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Before you start

Users are responsible for reviewing and adapting the SWMS to the actual worksite, work methods and applicable regulatory requirements before work begins.