Sink Installation near you

The half of the job that matters most is the half that ends up hidden. On the waste side the fixture connects into the sanitary plumbing system, which the National Construction Code covers from the fixtures and appliances through to the point of connection with the sanitary drainage system. The trap under the sink is not there for convenience: its water seal is what keeps foul air out of the room, and the Code frames the requirement in those terms, requiring the system to prevent the entry of foul gases into buildings and setting the trap seal depths that must survive the pressure swings a drainage system produces in normal use.

That is also why venting comes into a job that looks like it should only be about a bowl and a tap. A trap seal can be siphoned out by other fixtures discharging nearby, so the Code sets ventilation requirements around each trap, including that a trap vent connects within 750 mm of the fixture it serves and is sized according to whether the connection is liable to blockage from splashing or submergence. Moving a sink any distance, or adding a second one, can take the branch outside what the existing arrangement supports, which is the usual reason a relocation turns out to be more work than expected.

On the supply side the installation ties into the cold water service, which the Code requires to be in accordance with AS/NZS 3500.1, and to the heated water service where there is a mixer. A competent installation includes isolating valves at the fixture so the sink can be worked on later without shutting down the property, flexible connectors routed so they are not kinked or chafing against the waste, the fixture sealed to the benchtop so water on the surface cannot run into the cupboard, and a test under running water with the cupboard dry and watched before the job is called finished.

Connecting a fixture to the water service and to the sanitary plumbing is licensed work. New South Wales requires the right licence or certificate before you do any plumbing, draining or gasfitting work, regardless of the cost of the work and regardless of whether the property is residential, commercial or industrial. Victoria permits plumbing work only by a plumber holding current registration or a licence, or a plumbing apprentice. Western Australia requires a licence from the Plumbers Licensing Board, and while it treats the like-for-like repair or replacement of an existing sanitary fixture as minor plumbing work, that concession is built on the fixture already being installed in place, which is not the case when a sink goes somewhere new.

Queensland shows most clearly how a fixture job is classified. Its Plumbing and Drainage Regulation 2019 sets out twelve categories of notifiable work, and two of them bear directly on sinks: work necessary for installing or relocating a fixture in an existing class 1 or 10 building, and work necessary for extending, altering, replacing or removing sanitary plumbing in an existing building. Notifiable work is registered with the Queensland Building and Construction Commission on a Form 4 or 4a, which is the record that the work was done by someone entitled to do it.

So ask two questions when you accept a quote. First, whether this job is a like-for-like replacement or an alteration to the plumbing, because that is what decides which rules apply rather than how big the sink is. Second, what document the job will produce and when your copy will arrive. Keep it with the product paperwork, since a renovation that cannot show who did the plumbing is a question at sale and an obstacle in an insurance claim.

These are two different jobs and it is worth being honest about which one you are buying. A like-for-like replacement reuses the existing waste position and water points, so the work is confined to the fixture, the tap, the trap connection and the seal to the benchtop. It is quick, it is predictable, and in states such as Western Australia the replacement of an existing fixture on a like-for-like basis is expressly treated as minor plumbing work.

Moving a sink is plumbing work in the walls and floor. The waste has to reach the existing branch with adequate fall, the venting has to still satisfy the Code for the new position, and the water points have to be run and made good. In a slab-on-ground house, which is most of the newer housing stock in this country, relocating a kitchen waste can mean cutting the slab, and that is a decision to make before the joinery is ordered rather than after.

The middle case is changing the mounting style in the same position, such as going from an inset bowl to an undermount one. The plumbing may barely change while the benchtop does all the work, and the constraint moves from the plumber to the benchtop material, its cut-out and its edge treatment. Have the plumber and whoever is making or modifying the benchtop agree on the cut-out and the waste position before anything is cut, because a bowl that does not line up with the existing waste is the point at which a simple upgrade becomes an alteration.

Keep three things when the job is finished: the invoice describing what was installed and what was altered, the certificate or notification the work generated where your state requires one, and the product documentation for the sink and tapware including the WaterMark certification details and the warranty terms. Photograph the connections under the cabinet before it is loaded up with cleaning products, because that photograph is what tells you later whether a leak is at the waste, the trap or a connector.

Under the Australian Consumer Law the guarantees apply to both the goods and the installation. Products must be of acceptable quality, and services must be carried out with an acceptable level of care and skill, be fit for any purpose you made known and, where no time was agreed, be supplied within a reasonable time. Where a problem with the service is minor, the business must fix it free of charge and the business chooses the remedy. Where it is major, including work that creates an unsafe situation or cannot be used for the purpose you explained and cannot easily be fixed in a reasonable time, you choose between cancelling for a refund or keeping the agreement at a reduced price. A business cannot contract out of any of that or simply redirect you to the manufacturer for an installation fault.

LokalMatch is where the job starts, not where it is carried out. You describe the sink installation once, with your postcode, whether the waste is staying in the same place, what the benchtop or vanity is made of and whether the fixture and tapware are already bought, and plumbing businesses covering your area get in touch with you directly. Those businesses pay LokalMatch for the requests they receive. LokalMatch does not install sinks, does not set or quote prices, and does not vet, rank or recommend any business, so comparing what each quote actually includes and checking the licence on your state register remains your job.