New Build Plumbing in Natural Bridge

The full scope on a typical acreage new build:

• Rainwater tank system design and install. Tank sizing to property roof catchment and household demand (typical 4-bedroom acreage home needs 22,500-45,000 litre tank capacity). Pressure pump and pressure tank sized to internal demand. First-flush diverter and leaf filter. Often a backup bore-water connection where bore is available.
• Internal water supply, long run from tank/pump to dwelling, sized to maintain pressure (typically 25-32mm internal mains). PEX or copper. Pressure-limit valve at the dwelling.
• Septic or AWTS install. Council-approved soil percolation test, system sizing to bedroom count and household occupancy (AS1547 standards). Absorption field or evapotranspiration field design. Council inspection at commissioning.
• Internal drainage, conventional PVC drainage from fixtures to septic / AWTS inlet. Often longer runs than suburban equivalent, careful fall management.
• LPG bottle gas service. Twin-bottle install with auto-changeover regulator (so you do not run out mid-cook). Sized to peak appliance demand (cooktop + HWU + BBQ + heater = typical 8-15 kg/hr). Compliance certification.
• Hot water unit, options: LPG continuous flow (most common for acreage), LPG storage, heat pump (works well on acreage with airflow), solar hot water (excellent for unshaded north-facing roofs in the hinterland), or wetback wood-burning system (uncommon but possible).
• Hot and cold rough-in to every wet area with isolation valves and pressure-limit valve at the dwelling.
• Outbuilding plumbing, sheds, granny flats, pool houses each need their own supply, drainage and sometimes gas. Acreage builds usually have multiple structures.
• Pool top-up and irrigation, teed off the tank water supply with separate isolation. Sometimes a dedicated pump for irrigation.
• Compliance pack at handover, QBCC Form 4, gas compliance, septic / AWTS commissioning certificate, hydrostatic pressure test, HWU warranty, as-built drainage and water supply drawings.

What is genuinely different about acreage new builds:

1. No council water main. Tank-and-pump system is the supply. Sizing matters, undersized pump means low pressure at the showerheads, undersized tank means running out during dry spells.
2. No council sewer. Septic or AWTS, sized to occupancy and soil percolation. Wrong sizing or wrong percolation field design causes failures within a few years.
3. No reticulated gas. LPG bottle service with auto-changeover. Bottle replacement cycle becomes a household routine (or you can set up automatic delivery contracts).
4. Long internal runs. 50-100+ metre runs from tank to dwelling, from dwelling to septic, from main house to outbuildings. Pipe sizing must account for friction loss.
5. Trade access matters. Long driveways, gates, restricted access for material delivery. We coordinate with the builder.
6. Owner-builder common. Acreage new builds skew toward owner-builders more than suburban. We deal direct with certifier and provide stage-by-stage compliance.

The systems we install and why: for AWTS we install BioCycle, Ozzi Kleen, Taylex and other council-approved units, all serviced under standard maintenance contracts. For rainwater pumps we install Davey, Grundfos and Onga. For LPG hot water Rinnai Infinity (continuous flow) is the standard. For tank-pump pressure control, modern variable-speed pumps deliver consistent pressure across varying demand.

Realistic 2026 ranges for an acreage new build, slab-to-handover plumbing only:

• Mid-spec acreage 4-bed (standard rainwater + septic + LPG): $26,000-42,000
• Premium acreage 4-bed (AWTS instead of septic, heat pump or solar HWU, larger tank with backup bore connection): $36,000-58,000
• Luxury hinterland build with outbuildings (4-bed main + granny flat + sheds + pool): $48,000-95,000+
• Tank install (22,500-45,000L) including pump and pressure tank: $4,800-9,500
• Septic install (standard 3,000L): $6,500-11,000
• AWTS install (BioCycle, Ozzi Kleen, Taylex): $12,000-19,000
• LPG service with twin-bottle changeover and full appliance hookup: $1,800-3,500
• Bore connection (existing bore): $1,800-3,500

Acreage plumbing runs 50-80% more than equivalent suburban builds because of the additional system complexity (tank + pump + septic + LPG instead of just mains connections) and longer internal runs.