What this class covers
ANZSIC class 3231 classifies businesses primarily engaged in plumbing, drainage, and related installation services within Australia's construction sector. This classification covers both residential and commercial plumbing work, excluding major civil engineering projects. Businesses in this category typically install, maintain, and repair water, gas, and drainage systems in buildings and structures.
Common examples include licensed plumbers installing hot water systems, roofing contractors specializing in gutter installation and repair, businesses that install and maintain septic tank systems, solar hot water system installers, and specialists in domestic water recycling equipment installation. These operations form part of the broader building installation services group within the construction division.
The Australian Bureau of Statistics uses this classification for economic data collection, while businesses use it for ABN registration, tax reporting, and industry benchmarking. Proper classification ensures accurate representation in industry statistics and appropriate regulatory treatment.
Primary activities in plain English
Businesses in this class typically engage in:
- Installing and repairing plumbing systems for water and gas in buildings
- Constructing and repairing drainage systems (excluding sewerage and stormwater mains)
- Installing and repairing roof guttering systems
- Installing hot water systems, including solar-powered units
- Setting up domestic water recycling equipment
- Installing and maintaining septic tank systems
- Repairing existing plumbing installations
These activities primarily occur during building construction, renovation, or maintenance projects across residential, commercial, and industrial properties.
Exclusions and nearby codes
Several related activities fall outside this classification and are covered by other ANZSIC codes:
- Construction of sewerage or stormwater drainage systems (classified under ANZSIC 3109: Other Heavy and Civil Engineering Construction)
- Installation of fire sprinkler systems (classified under ANZSIC 3234: Fire and Security Alarm Installation Services)
- Repairing gas appliances rather than plumbing systems (classified under ANZSIC 9421: Domestic Appliance Repair and Maintenance)
- Pumping or cleaning septic tanks (classified under ANZSIC 2921: Waste Treatment and Disposal Services)
These distinctions help ensure businesses are correctly categorized for statistical and regulatory purposes based on their primary activities.
Practical guidance
When registering your business with the Australian Business Register, use Business Industry Code (BIC) 32310, which corresponds directly to ANZSIC 3231. This ensures proper classification for tax purposes and industry reporting.
Workers' compensation classifications vary by state and territory, but plumbing services typically fall under construction-related categories that reflect the trade's risk profile. Check with your state's WorkSafe authority for specific premium calculations.
Certain government grants or industry assistance programs may target specific ANZSIC classifications. Verify eligibility criteria when applying for business support programs, as some may be limited to particular construction sub-sectors.
Maintain accurate records of your primary revenue sources, as the Australian Taxation Office may review your business classification against actual activities conducted.