How to Choose a Plumber: Leaks, Hot Water and Red Flags

Finding a reliable plumber is much easier when you are not standing in a flooded laundry. Yet that is exactly when most of us start looking, and urgent jobs are when people are most likely to overpay or hire the first number that answers.

This guide shows you how to choose a good plumber before you need one, which jobs you can handle yourself, and which ones must go to a licensed professional.

Which jobs need a licensed plumber

Plumbing and gas fitting rules differ between states and territories, but as a general principle, work on water supply, drainage, hot water systems and gas must be done by a licensed professional where the law requires it. Some tasks are often fine for a handy homeowner, such as replacing a tap washer, a showerhead or a flexible tap hose. Anything involving pipework behind walls, gas or hot water units should go to a licensed tradesperson.

Unlicensed work can void insurance, fail inspection and cause expensive damage. Check your state or territory regulator for the rules that apply to you.

How to check a plumber is the real deal

1. Ask for their licence number and verify it with the relevant state or territory licensing body.
2. Confirm insurance. Ask whether they carry public liability cover.
3. Read recent reviews from more than one source, and look for comments about punctuality, tidiness and honesty.
4. Ask for a written quote that lists the work and materials, or a clear explanation of how they charge.
5. Ask about warranties on both workmanship and parts.

Common jobs and what to expect

Leaks and rising water bills

If your water bill jumps and you cannot explain why, a hidden leak may be to blame. Check whether the meter moves when every tap and appliance is off. A plumber can use leak detection equipment to find the source without tearing up half the house, and early repair can prevent damage to walls and floors.

Blocked drains

Slow drains are often caused by hair, grease or wipes, and tree roots can affect outside pipes. A plumber can clear blockages and may use a camera to inspect the pipes. Avoid chemical drain cleaners if you plan to have a professional work on the pipe, as they can be hazardous.

Hot water systems

If your system is old, leaking or no longer keeping up, it is worth comparing options before it fails. Gas, electric, heat pump and solar systems all have different running costs and installation requirements, and some states offer rebates or incentives for efficient models. Ask your plumber about rebates that may apply and which size suits your household.

What affects the price

Plumbing costs vary by city and job. Common factors include the time of day, since after-hours call-outs usually cost more, the complexity and access, the cost of parts and the plumber's experience. Some charge a call-out fee plus hourly rates, and others quote a fixed price for set jobs. Ask upfront which applies so there are no surprises.

It is worth getting two or three quotes for bigger jobs. Cheapest is not always best, so compare the scope, materials and warranty.

Red flags to watch for

• No licence number, or a reluctance to share it
• Asking for full payment before the work starts
• Pressure to replace an entire system without explaining why
• A quote that is far below every other quote
• Vague answers about parts, warranties or approvals

Know your emergency basics

Everyone in the house should know where the main water shut-off valve is and how to turn it off. Locate the hot water isolation valve and the gas shut-off too. In an emergency, turning off the water at the main can limit damage while you wait. Keep a trusted plumber's number saved in your phone.

Key takeaways

• Use a licensed plumber for anything beyond simple tap and fitting jobs.
• Verify the licence and ask about insurance and warranty.
• Compare quotes on scope, not just price.
• Know where your main shut-off valve is before an emergency.