The state rules, briefly. Mandurah plumbers are licensed through the same Plumbers Licensing Board as everyone else in WA, the PL number belongs in your advertising, and replacing a water heater carries the usual notice of intention and certificate of compliance. Our Perth plumbers page sets out the regulations behind each of those. Mandurah homes are on the Water Corporation's water and sewer networks, so its backflow testing and lodging rules apply here as they do in Perth.
Where the calls come from. The City of Mandurah is made up of 18 suburbs. At the 2021 census Halls Head was the biggest, with 14,474 residents, ahead of Greenfields at 9,869 and Meadow Springs at 9,160, while Dawesville, Dudley Park and Lakelands each had between about 6,200 and 7,100. Inland, the Shire of Murray takes in Pinjarra, Ravenswood and North and South Yunderup; over the northern boundary, the City of Rockingham's suburbs include Singleton, Golden Bay and Secret Harbour. People type those names into a search, so a list of the ones you'll drive to, with job photos captioned by suburb, does more than a line about Mandurah and surrounds.
Septic tanks off the sewer. A property that isn't connected to the Water Corporation's sewer needs a wastewater system approved by the City before it is installed or used. The City describes the conventional option, which suits most properties, as two septic tanks with either two leach drains or four soakwells, and it requires a nutrient retentive system on properties in environmentally sensitive areas. It also tells owners to speak to its Health Services team before buying a system, and greywater reuse is only allowed in approved parts of Mandurah. A plumber who installs systems can save the owner a step by saying which of these they fit and that they'll work to the permit's conditions.
When a tank has to go. Connecting to sewer doesn't automatically oblige an owner to decommission the old tank, although the City recommends doing it as soon as possible. It becomes a legal requirement within 60 days of a change of ownership, within 60 days of a material change of use (a house becoming a business, for example), and before building work begins if foundations will come closer than 1.2 metres to the tank or a building is to go over it. The tank is pumped out by an approved contractor, then removed and the hole backfilled with sand, or broken at the base and filled if removal isn't practical, and the City is notified in writing with the liquid waste contractor's certification. Until that's done, the tank can't be paved or built over without the City's approval, which is exactly the kind of detail a buyer's checklist turns up.
Leaks, gas, and how we work. The Water Corporation can credit up to 50% of the estimated water lost through a hidden leak, provided a licensed plumber repairs internal plumbing within 60 days of detection and the claim, with a digital copy of the repair invoice, goes in within 6 months of the repair; reticulation leaks go to a Waterwise Garden Irrigator instead. The Economic Regulation Authority lists Mandurah and Pinjarra among the places ATCO's gas distribution systems serve. We're an Adelaide team and work with Peel businesses by phone and email; we haven't built for a WA client yet, so the examples below are from Queensland and New South Wales. Mandurah runs on Perth time, 1.5 hours behind Adelaide, or 2.5 hours while South Australia has daylight saving.