The legal line: existing points yes, new points no
Queensland's plumbing rules draw a sensible line for household appliances. Connecting a dishwasher to a connection point provided for that purpose, meaning a dedicated dishwasher stop tap and a proper drainage connection, sits within unregulated work that a homeowner may do. What you may not do is create the infrastructure: tee into a water pipe, add a stop tap, cut into the sink waste, or run any new drainage. The moment a job involves making a new water or sanitary connection, it is regulated plumbing work under the Plumbing and Drainage Act 2018 and must be done by a licensed plumber. That line exists because a hidden connection behind a kitchen cabinet that seeps for months does more damage than almost any visible failure in the house.
| Task | Legal DIY in QLD? |
|---|---|
| Plug a dishwasher hose onto an existing dishwasher stop tap | Yes |
| Push the drain hose onto an existing spigot or standpipe made for it | Yes |
| Swap an old dishwasher for a new one on the same points | Yes |
| Tee into the sink cold water line to add a stop tap | No, licensed work |
| Cut a new drainage connection into the sink waste | No, licensed work |
| Move the dishwasher to a new cabinet position needing new pipework | No, licensed work |
What a first-time dishwasher point actually involves
If your kitchen has never had a dishwasher, someone has to build the point: a tee off the cold supply with a dedicated quarter-turn stop tap, a drainage connection with the hose properly secured in a high loop so the machine cannot siphon or take waste water back in, and a check that the whole thing complies with AS/NZS 3500. It is not a big job for a licensed plumber and we quote it as a small fixed price on inspection, typically bookable alongside other kitchen work. What we will not do is bless the alternative we find behind cabinets every month: a self-tapping saddle valve or push-fit tee squeezed onto the supply line, dripping quietly into chipboard. Those fittings are the origin story of a remarkable number of ruined kitchen kickboards on the Gold Coast.
Doing the legal DIY part properly
If your points exist and you are connecting the machine yourself, a few habits prevent nearly all grief. Use the new inlet hose supplied with the machine rather than the old one, since inlet hoses are aged parts the same way flexi hoses are, and at $20 to $40 a hose at trade there is no economy in reusing a decade-old one. Turn the stop tap off, connect, then open it and watch the joint under load for a few minutes with a dry paper towel, which shows a weep you cannot feel. Secure the drain hose in the high loop per the manual so you never get sink water siphoning into the machine. And know where that stop tap is, because it is the thing you will want in a hurry if the machine ever lets go mid-cycle. It is also worth running the first full cycle while you are home and checking under the sink with a torch afterwards, because a connection that survives its first hot, vibrating, full-pressure cycle dry will usually stay dry. Finally, close the stop tap if you go away for more than a few days, the same habit we recommend for washing machines, since an appliance hose under constant mains pressure in an empty house is how small failures become insurance claims.
When calling us is the smarter play anyway
Book a plumber when there is no existing point, when the existing stop tap will not turn or weeps when operated, when the drain arrangement is a hose jammed into an open pipe rather than a made connection, when the dishwasher is going somewhere new in the layout, or when a rental or an insurance-conscious owner wants the connection documented by a licensed trade. We do these as small fixed-price jobs, often while attending something else in the kitchen, and the invoice gives you a licensed record of the connection. In our experience the homeowners who spend the least on kitchen water damage are the ones who spent a little on the connection once.
QLD compliance note: Connecting an appliance to existing purpose-made points is unregulated work a homeowner may do, but creating or altering water supply and drainage connections is regulated plumbing work under the Plumbing and Drainage Act 2018 and Regulation 2019, requiring a QBCC-licensed plumber.
Need a dishwasher point installed, moved or made safe on the Gold Coast? Call Hills Plumbing & Gas on 0472 657 042 for a small-job fixed price under QBCC licence 15243081, or book through our leaking taps and toilets service page.
Sources: Queensland Plumbing and Drainage Act 2018, Plumbing and Drainage Regulation 2019 (unregulated work provisions), QBCC guidance on who can do plumbing work, AS/NZS 3500.