Irrigation near you

Most domestic systems are assembled from the same handful of components, and how they are chosen decides both how well the garden does and how much water is wasted. Sydney Water's position is straightforward: sprays use the most water, while drippers use the least, and an automatic system is only efficient when it is well designed, programmed and maintained.

Connecting a garden watering system to the drinking water supply is not general handyman work. In New South Wales, a licence or certificate is required for any plumbing, draining or gasfitting work regardless of cost and regardless of whether the property is residential or commercial, which includes connecting to or altering drinking water supplies. Building Commission NSW regulates that work under the Home Building Act 1989, contractor and supervisor level qualifications run to a Certificate IV in Plumbing and Services with industry experience behind it, and unlicensed work carries substantial penalties for individuals and larger ones for companies. Licences can be checked before work starts.

Backflow prevention is the safety half of that connection. Sydney Water treats garden irrigation connected to the drinking water supply as a cross-connection hazard — a cross connection being any arrangement that could, under certain conditions, allow non-drinking water or other substances to enter the drinking water supply — and requires suitable backflow containment on connections to its mains. The devices must be handled by a backflow-accredited licensed plumber who has competently completed the recognised backflow unit of competency, and the installation is governed by the plumbing standards AS/NZS 3500.1 and AS/NZS 2845 together with the National Construction Code plumbing volume.

Testable devices are tested and reported on rather than fitted and forgotten, with an annual test report expected for an existing device. If you are being quoted for a system that ties into mains water, ask who holds the plumbing licence, who holds the backflow accreditation, and who lodges the test report — and ask your own water authority, since requirements vary between them.

Irrigation is the one garden system that can quietly break a rule every morning while you sleep. Overspray onto a footpath is not permitted in the Sydney Water area, a system running outside its allowed window is a breach regardless of how efficient the hardware is, and a controller left on its summer program after rain wastes water for weeks before anyone notices. A seasonal check is a short job that prevents all three.

Most irrigation complaints come down to a system that was designed for the tap pressure it wished it had. Too many heads on one zone leaves every head underperforming, so the lawn gets a fine mist that evaporates and never reaches the root zone. Shallow, frequent watering compounds it by encouraging shallow roots, which makes the garden less able to cope the moment anything interrupts the schedule.

The visible faults are usually mechanical: heads knocked out of alignment by mowing so they water the driveway, drippers blocked by sediment or root intrusion, a valve that fails to close and quietly runs a zone for hours, and damage from a spade or an edger cutting a lateral line. On bore water, mineral content is its own problem — iron staining on paving and fences is common enough in parts of Australia that it is worth asking about head selection and flushing routines before the system goes in.

The most expensive fault is the one nobody sees. An underground leak on a mains-fed system runs continuously, and because the pipework is buried the first evidence is often a water bill rather than a wet patch. If the meter is turning with every tap and the controller off, the irrigation system is the first place to look.

The source you irrigate from changes both the rules and the plumbing. Mains water is the most regulated: it falls squarely under the permanent water rules, and the connection needs licensed plumbing work and backflow prevention. Rainwater from a tank is generally outside those watering restrictions, which is a large part of why tanks are so common in Australian gardens, and Sydney Water indicates rainwater can be used for garden taps as well as toilets, washing machines and hot water systems.

Tanks come with their own requirements rather than none. Sydney Water notes that tanks do not normally need council approval where they store up to ten thousand litres, that you should check your backflow prevention requirements as a property-specific device may be needed, and that a plumbing inspection is mandatory where the tank is topped up by — or switched to — the drinking water supply when it runs empty, with a certificate of compliance meeting the plumbing code. Gutter guards or downpipe screens, a first-flush device and mosquito-proofed inlets and overflows are the basic maintenance items.

Bores are a Western Australian staple and are not a way around the rules there: the winter sprinkler switch-off from 1 June to 31 August applies to domestic garden bores and licensed groundwater users as well as to scheme water, and the rostered watering days apply to bore-fed reticulation too. Wherever you are, confirm with your own water authority which sources its rules cover before you build a system around an exemption you have assumed.

Australian Consumer Law guarantees that services are supplied with due care and skill, are fit for any purpose you made known and are supplied within a reasonable time where none was agreed, and those rights cannot be excluded by a business's terms. For irrigation, the scope should record the zone layout, the delivery type in each zone, the controller and any sensors, who carries out and certifies the mains connection and backflow device, what is being trenched and sleeved, and what the commissioning and handover includes.

LokalMatch is where you find the contractors. Describe the garden once — its size and layout, the areas you want watered, whether you are on mains, tank or bore, your postcode and your timing — and irrigation contractors working in your area contact you directly. Those businesses pay LokalMatch for the requests they take on, which funds the service, and it costs a homeowner nothing to describe a job. LokalMatch does not install or repair irrigation, does not quote or set prices, and does not vet, rank or recommend any business, so confirming plumbing licences and backflow accreditation is still something you do yourself.