The Victorian rules, briefly. Mildura plumbers are registered or licensed with the Building and Plumbing Commission, which replaced the Victorian Building Authority on 1 July 2025. Accreditation is held by individuals, class by class, and a licensed plumber issues a compliance certificate for work worth more than $750 and for some gas and drainage work at any price. Our Melbourne plumbers page sets out the detail, including the 2027 changes to gas hot water, and all of it applies in Sunraysia.
Lower Murray Water's backflow policy. The current version, approved in March 2026, applies to every property connected to its supply. A new non-residential development with no known hazard is automatically specified a high hazard device, and consent to connect isn't granted until the backflow paperwork is in. The owner signs an agreement to have the device tested at intervals of no more than 12 months. A plumber licensed in water supply may install it, but only a suitably qualified person may commission and test it. Two rules matter in a district of river pumps and water carting: standpipes used for tankering or water carting are rated high hazard, and a fire service with a boost connection within 180 metres of a river or dam is rated at a higher hazard level. Where a service is renewed from main to meter, an old non-return valve no longer counts as protection.
Living with untreated water. Irrigation water, domestic and stock supplies and private diversions from the river are all untreated, as is the town supply in Meringur, Werrimull and Cullulleraine (and Mystic Park, near Kerang); Lower Murray Water's other town supplies, Mildura's included, are treated. It asks owners to make sure no cross connection exists between the untreated supply and their drinking water, and its backflow policy says the two may only be joined through an appropriate backflow device. For storage, it recommends six weeks of normal use and a minimum of 45,000 litres where the domestic and stock supply is the only one, or 4,500 litres where a property also has urban water, and it doesn't permit earthen dams for this purpose. That's tank, pump and filter work, and if you do it, it deserves its own section.
Trade waste and septic. Lower Murray Water splits trade waste customers into minor dischargers, such as hotels, restaurants, takeaways, laundries and car washes, which need a consent to discharge, and major ones, generally over 1,000 kilolitres a year, such as fruit and vegetable processors, packing sheds, abattoirs and wineries, which sign a trade waste agreement. It asks businesses without a grease trap to seek its advice before one goes in, and emptying a trap is a job for a licensed liquid waste business. Off the sewer, Mildura Rural City Council's environmental health team issues septic consents, and a building surveyor needs the council's report and consent before issuing a building permit for an unsewered lot.
Across the Murray. Buronga, Gol Gol, Dareton and Wentworth are in Wentworth Shire, and the council's own water and sewer network serves them. Homes in those townships get two supplies: untreated raw river water for outside and the garden, and filtered water inside the house. The council sells both kinds of connection and takes the Notice of Work that NSW plumbers must lodge before starting. A Victorian plumber working there needs a NSW licence or a notification under automatic mutual recognition, which our Albury-Wodonga plumbers page explains in more detail. We're an Adelaide team, half an hour behind Mildura's clocks, and we work with Sunraysia plumbers entirely by phone and email: you send your licence details, towns and photos, check the draft on your phone, and pay once you approve it.