What Is Public Liability Insurance?
Public liability insurance is a type of liability cover.
The Australian Government’s business insurance guidance describes it as insurance that may cover a business where someone dies, is injured or has property damaged because of the business’s negligence.
For a plumbing business, that may involve work performed in a home, commercial building, construction site, public area or business premises.
The policy may respond to covered compensation claims and related legal costs, subject to its terms.
What Types of Claims May Be Covered?
Injury to another person
A customer, visitor, tenant or member of the public may allege that plumbing activities caused an injury. Examples include someone slipping on water, tripping over equipment or being injured near the work area.
Workers compensation usually deals with eligible employee injuries. Public liability generally deals with claims made by third parties.
Damage to someone else’s property
Property damage is particularly relevant to plumbers because water can travel beyond the original work area. Examples may include:
Water damaging flooring, walls or cabinetry
Fire caused during hot work
Damage to underground services
Damage spreading to another apartment or tenancy
Whether a claim is covered depends on the facts and policy wording.
Consequential loss
Property damage may also interrupt another business. For example, water damage in a retail tenancy could lead to a temporary closure and a claim for lost income as well as physical damage.
Policies can treat consequential loss differently, so the wording and limits matter.
Public Liability and Products Liability
Public and products liability are commonly included together, but they address related risks.
Public liability generally focuses on injury or property damage arising from business activities.
Products liability may become relevant where injury or damage is connected with something the business supplied, installed, repaired or treated. For plumbers, a completed installation or supplied component may be treated as a product under the policy definition. That matters because a problem may only appear after the plumber has left the site.
Does It Cover Faulty Workmanship?
Public liability insurance does not generally operate as a warranty for the plumber’s own work. The cost of removing and redoing defective work may be excluded. Separate resulting damage may be considered differently.
For example:
Replacing a poorly installed fitting may be treated as correcting the plumber’s work.
Water damage to flooring and cabinetry caused by that fitting may be a separate property-damage issue.
The distinction depends on the wording and circumstances.
For Victoria’s prescribed licensed-plumber insurance framework, see Plumbing Insurance Requirements in Victoria.
What May Not Be Covered?
Depending on the policy, exclusions or restrictions may apply to:
The plumber’s own tools, ute or property
Injury to employees
Correcting defective work
Professional advice or design
Motor vehicle accidents
Pollution or asbestos
Contractual liabilities that would not otherwise exist
Deliberate or unlawful acts
Work outside the declared business activities
Undisclosed or restricted subcontractor work
An exclusion does not mean every claim involving that topic is automatically declined. The wording and facts need to be considered together.
Your Business Description Matters
Insurance applications commonly ask what work the business performs.
Domestic maintenance presents different activities from civil drainage, gas fitting, fire services, roofing, excavation or large commercial work. If the business changes what it does, the policy description may no longer reflect the actual work. Restrictions may also apply to certain activities, locations or project values.
“Plumber” is a starting point, not always the full risk description.
Subcontractors Can Change the Picture
Using subcontractors may raise questions about:
Whether subcontractor use was disclosed
What work the subcontractor performed
Whether they held their own insurance
Which business held the customer contract
Whether the policy restricts subcontracted work
Who is legally responsible for the incident
A subcontractor’s Certificate of Currency does not automatically protect the main plumbing business.
See Plumbers and Subcontractors: What Can Go Wrong — And Who Is Responsible?
What Does the Limit of Liability Mean?
The policy schedule shows a limit of liability. This is usually the maximum amount available for covered claims, subject to the wording. The way the limit applies may differ between public and products liability. Legal costs may sit inside the limit or be handled separately depending on the the specific policy wording.
A builder or contract may also specify a required limit. Meeting that number does not confirm that every activity on the project is covered.
A Real-World Example
A plumber replaces pipework in a customer’s kitchen. Several days later, a connection fails and water damages the flooring, cabinetry and apartment below.
The claim review may consider:
What caused the failure
Whether the plumber is legally liable
The cost of correcting the connection
The separate damage to other property
Exclusions, excesses and limits
Whether another contractor altered the work
The cost of redoing the connection may be treated differently from the resulting water damage. That is why “public liability covers water damage” is too simple.
What Information May Be Needed for a Claim?
A liability claim may involve:
The contract, work order and scope
Invoices and compliance documents
Photos and incident reports
Statements from people involved
Subcontractor records
Expert reports
Customer, builder or legal correspondence
Policy conditions may require incidents and claims to be notified. A demand for payment or threat of legal action may be relevant even before court proceedings begin.
Questions to Check in the Policy
Useful factual questions include:
What business activities are declared?
Are subcontractors addressed?
What public and products liability limits apply?
How are legal costs treated?
What exclusions apply to faulty workmanship?
Is resulting damage treated separately?
Are excavation, hot work or gasfitting restricted?
What notification conditions and excess apply?
For broader comparison guidance, see How to Compare Plumbing Insurance Quotes.
Key Takeaways
Public liability may respond where plumbing activities cause third-party injury or property damage.
Products liability may be relevant to supplied, installed or completed work.
It does not generally insure the plumber’s own tools, vehicle or property.
Correcting defective work may be treated differently from resulting damage.
Business activities, subcontractors, exclusions, limits and policy conditions matter.
A contractual limit does not guarantee that every activity is covered.
Clear job records can help establish what happened.
Frequently Asked Questions
How much public liability cover do I actually need for commercial site work?
If you only do basic domestic maintenance, a $5 million limit is a common starting point. However, if you work for commercial builders, tier-one contractors, shopping centres, or government sites, they will almost always demand a minimum of $10 million or $20 million. It is worth checking the contract paperwork before you sign anything. Meeting the builder's required number is usually mandatory just to get your gate pass or induction sorted.
Are you covered if an oxy torch or welding spark starts a fire?
It can be covered, but hot work comes with strict rules. Most insurers put specific "Hot Work Conditions" in the fine print.These usually state you must clear the area of anything flammable, keep working fire extinguishers within arm's reach, and stand watch for a set time after the flame is turned off to check for smouldering. If a fire starts and you didn't follow these steps, the insurer may limit or decline the claim.
If someone sues my plumbing business, who pays for the lawyers?
This depends on whether your legal costs sit "inside" or "outside" your main liability limit.If your policy says costs are "inclusive" (inside), any money the insurer spends on lawyers to defend your business will actively eat into your cover. That means you have less money left over to pay for the actual property damage or injury.
Does my public liability policy automatically cover digging and excavation work?
Not always. Digging carries different risks and often comes with depth limits in the policy print—such as a maximum restriction of 2 or 3 metres.If your business uses excavators or digs trenches, you usually need to disclose this to your insurer. Claims can also be rejected if you didn't use an asset locator service to check for underground lines before breaking ground.
What happens if a part I installed fails and floods a kitchen weeks later?
Once you pack up and leave the site, a failure like a burst flexi-hose or a leaking valve usually falls under the products liability section of your policy.The insurer will look at whether the part itself was faulty or if it was an installation mistake. If it was poor workmanship, the policy generally won't pay to fix the pipe joint, but it may consider a claim for the ruined cabinets and flooring caused by the water.
Can a customer lodge a liability claim for a job I did a few years back?
Yes, they can. Most trade public liability policies work on what is called an "occurrence basis." This means the policy that handles the claim is the one that was active when the damage actually happened, not when you did the physical work.If you did a rough-in three years ago and it bursts today, it is your current policy that needs to be reviewed, which is why keeping continuous cover in place matters.
