Move inland to the crest of the Great Dividing Range and Queensland's plumbing rules don't change, even though the climate does. A QBCC Plumbing and Drainage licence, checked against the official register, is required at any job value — no $3,300 threshold shelters a small job here, unlike the building trades. Connecting a gas hot water unit needs a separate Gasfitting licence. The regulation exempts only a short list: washers inside a toilet cistern, a sanitary drain cap, a septic effluent line — everything else needs a licensed plumber. Review themes are counted from real Google reviews; prices are Toowoomba-specific where a source exists.
Toowoomba is the one inland city on this site, on the Great Dividing Range at roughly 700 metres. BOM's Toowoomba Airport record puts July's mean minimum at 6.6°C, with light frost several nights most winters and a record low of -4.4°C — exposed pipework and hot water demand through a real winter are live concerns here, unlike the coastal pages, and there's no cyclone risk or salt air to offset it. The region's black soil is a vertosol, a cracking clay that shrinks and swells through wet-dry cycles and moves buried pipework. Older suburbs like the Caledonian Estate carry turn-of-the-century cottages, much of it still on original galvanised supply pipe. On 10 January 2011, East and West Creek overflowed into the CBD valley that forms Gowrie Creek, a flash flood that showed the city's drainage faces real event risk despite sitting nowhere near a coast. Further out on the Darling Downs, rural blocks often run on tank or bore water with no mains sewer, relying on septic instead.