Tapware type and brand for every wall mixer and spout
In-wall mixer bodies are brand-specific. The trim must match the body already in the wall.
Ask: Is the trim you want the same brand as the body going in now?
Plan · Stage 3 of 10 · 12 decisions
Decide before rough-in
Before the plumber and electrician run pipes and cables. Everything that sits in the wall or ceiling. Most variations start here.
Copies the decisions shown, with a prompt, to paste into ChatGPT, Claude or Gemini.
Shower: rail set or overhead arm, and the rose and mixer heights
The outlets are fixed in the wall. Roses usually sit 2000 to 2200 mm and mixers about 1000 to 1200 mm. source
Ask: Rail or arm? Have you set the heights from the finished floor?
Floor waste: point or linear, and where it goes
It sets the falls and should sit on the tile grid.
Ask: Will the waste land on a tile joint, and which way does the floor fall to it? Choose it here
Vanity top height and basin type (above counter, under counter, wall basin)
It sets the waste and supply heights, and the spout is set off the basin rim. Tops usually sit 850 to 900 mm. source
Ask: What height is the finished top, and how high is the basin rim above it?
Toilet pan and its set-out from the wall
Pans are set out at 140 or 165 mm from the wall. The waste is placed to suit the pan. source
Ask: Which pan, and which set-out does its install sheet give?
Hot water system type and location
It sets pipe runs and power or gas. Water at basins, baths and showers is limited to 50 degrees C. source
Ask: Where does the hot water unit go, and how far is the longest run?
Every power point, switch and light, including power inside joinery
Cables go in before the walls close. Power points are usually about 300 mm high and switches about 1000 to 1200 mm, by convention, not code. source
Ask: Have you walked each room with the furniture: bedsides, desk, TV, benches, robe, appliances?
What electrical items go near the shower and bath
AS/NZS 3000 sets zones around showers and baths that limit what can go where. source
Ask: Has your electrician checked every point near water against the wet-area zones?
Heated towel rail, LED mirror, shaving cabinet power and exhaust fan
Each needs a point at the height its install sheet gives, and the fan needs a duct.
Ask: Do you have the install sheet for each powered item?
Power, gas and water for each appliance: cooktop, oven, dishwasher, fridge water, microwave
Each sits at a position the appliance's spec sheet sets.
Ask: Is every appliance's point placed to its spec sheet, not a guess?
Outdoor power, taps and lighting
Outdoor power points must be at least 300 mm above the ground. source
Ask: Where do you need power, water and light outside?
Data, TV, air conditioning heads and drains, and smoke alarms
All run in the walls and ceiling. Smoke alarm rules differ by state.
Ask: Have you checked your state's smoke alarm rules, and where the AC drain runs?
← Framing Set-out and screed →
Prompts, not rules. Most choices can wait; these can't, because a later trade builds to them. Code items cite their source; states adopt parts of the NCC differently, so check yours. Your builder, trades, certifier and each product's install sheet decide. Download the list (JSON, CC BY 4.0).