Water Efficiency Certificates in QLD: The Complete Guide for Plumbers & Landlords
If you're a plumber in Queensland doing maintenance work for real estate agents or landlords, you'll be dealing with Water Efficiency Certificates on a regular basis. Under the Residential Tenancies and Rooming Accommodation Regulation 2009, a landlord cannot legally pass on water consumption charges to a tenant unless the property is certified as water efficient.
In this guide, we'll cover exactly what the legislation requires, what you need to check during an inspection, and how you can ditch the old paper forms for a free digital alternative.
What Is a Water Efficiency Certificate?
A Water Efficiency Certificate (sometimes called a Water Compliance Certificate) is a legal document signed by a licensed plumber. It confirms that a rental property meets the minimum water efficiency standards set by the Queensland Government.
Without this certificate, the property owner must pay for all water usage — they cannot bill the tenant for it, regardless of what the lease agreement says. The certificate remains valid indefinitely, provided the fixtures aren't changed or modified.
The 4 Compliance Requirements
To pass the inspection and issue the certificate, you must verify four specific criteria:
1. Individual Metering
The property must have its own individual water meter or sub-meter. If it's a block of units sharing a single main meter without sub-meters, the landlord cannot charge for water consumption anyway, making the certificate moot.
2. Internal Cold Water Taps (≤ 9 L/min)
All internal cold water taps that are installed over a hand basin, kitchen sink, or laundry trough must have a maximum flow rate of 9 litres per minute. This is typically achieved by installing aerators or flow restrictors. Note: Taps over a bath or taps that only supply hot water are generally exempt, but best practice is to restrict the mixer.
3. Showerheads (≤ 9 L/min)
Every showerhead in the property must have a maximum flow rate of 9 litres per minute. This equates to a 3-star WELS (Water Efficiency Labelling and Standards) rating or better.
4. Toilet Cisterns (Dual Flush)
All toilets must be dual-flush, with a maximum flush volume of 6.5 litres on full flush and 3.5 litres on half flush. This is equivalent to a 3-star WELS rating. Old single-flush cisterns must be replaced to achieve compliance.
What about external taps?
External taps used for garden watering or hoses are exempt from the 9 L/min restriction. They do not need to be restricted or replaced to pass the inspection.
How to Test Flow Rates
Testing is straightforward. You'll need a measuring jug (preferably 1-litre or 2-litre capacity) and a stopwatch (your phone is fine).
- Turn the tap or shower on to full flow (cold water only for taps).
- Place the jug under the flow and start the stopwatch simultaneously.
- Time how long it takes to fill 1 litre.
- Calculate:
(60 ÷ seconds taken to fill 1L) = Litres per minute.
For example, if it takes 8 seconds to fill a 1-litre jug: 60 ÷ 8 = 7.5 L/min. This passes the 9 L/min requirement.
Ditching the Paper Forms
Historically, plumbers bought pads of carbon-copy Water Efficiency Certificates from industry associations. You'd handwrite the details on site, tear off the copy, and try not to lose it before you got back to the office to scan and email it to the real estate agent.
That's completely unnecessary now.
TradeDesk has built a Free Digital Water Efficiency Certificate generator specifically for Queensland plumbers. It works on your phone, tablet, or desktop.
- Auto-fill: It automatically pulls your name, licence number, QBCC number, and company details from your profile.
- Digital Signature: Sign once with your finger or stylus, and it saves your signature for all future certificates.
- Instant PDF: Generates a professional, branded A4 PDF instantly.
- History: Every certificate you generate is saved to your account forever. If a real estate agent loses it two years later, you can re-download it in seconds.
The best part? It's completely free for up to 5 certificates every month. If you're doing high-volume real estate maintenance, the TradeDesk Pro plan ($79/mo) gives you unlimited Water Efficiency Certificates, plus unlimited Form 7s, Form 9s, and our full AI-powered scheduling and quoting suite.