Activities covered by TSIC 43221
Official TSIC PDF extract for Water plumbing and drain laying insta llation. Cross-links are currently generated from division and section heuristics until richer official mappings are connected.
Key checkpoints for this code
43221TSIC code
3Linked tax pages
1Relevant provinces
0Standards and customs checks
Compliance risk score
5 of 6 factors passing
8 / 10
- Verified official source - tsic_nso_structure.xlsx | SHA 8af4ddb63f5e
- International crosswalk - ISIC Rev.4 4322 -> ISIC Rev.3.1 4530 (partial)
- Previous-edition migration - TSIC 2544 codes: 45301
- Complete hierarchy - 5 hierarchy levels confirmed in the TSIC tree.
- Trade or export match - No linked HS or customs code is mapped to this TSIC record.
- Legacy crosswalk - TSIC 2544 codes: 45301
Who should use TSIC 43221?
This code typically applies to:
2142Civil EngineersCivil engineers conduct research, advise on, design, and direct construction; manage the operation and maintenance of civil engineering structures; or study and advise on technological aspects of particular materials.3112Civil Engineering TechniciansCivil engineering technicians perform technical tasks in civil engineering research and in the design, construction, operation, maintenance and repair of buildings and other structures such as water supply and wastewater treatment systems, bridges, roads, dams and airports.7112Bricklayers and Related WorkersBricklayers and related workers lay bricks, pre-cut stones and other types of building blocks in mortar to construct and repair walls, partitions, arches and other structures.7114Concrete Placers, Concrete Finishers and Related WorkersConcrete placers, concrete finishers and related workers erect reinforced concrete frameworks and structures, make forms for moulding concrete, reinforce concrete surfaces, cement openings in walls or casings for wells, finish and repair cement surfaces and carry out terrazzo work.7126Plumbers and Pipe FittersPlumbers and pipe fitters assemble, install, repair and maintain pipe systems, drains, gutters, ducts and related fittings and fixtures for water, gas, drainage, sewerage, heating cooling and ventilation systems, and for hydraulic and pneumatic equipment.
Additional occupations for TSIC 43221
Source: ISCO-08 occupation dictionary + TSIC official activity semantics, 2026-05-05
Official activity name and details
- Official English label: Water plumbing and drain laying insta llation
- Section: F
- Data coverage: official-tsic-import
- Division: 43 - Specialized construction activities
- Group: 432 - Electrical, plumbing and other construction installation activities
- Class: 4322 - Plumbing, heat andair-conditioning installation
Use the official TSIC label below when the Thai translation is not yet source-backed in this build.
Official extract note
- Official NSO TSIC ebook page: 102
- This classification label was imported from the official TSIC PDF extract and linked back to the DBD and NSO routes used in this portal.
Important checks before registration
- Ownership route: Use this page as an ownership-routing layer only. Verify FBA, BOI, treaty and shareholder structure together.
- Permit route: Treat permit notes as a checklist only. The real permit stack depends on the operating model, location and regulator.
TSIC hierarchy position
- Section F - Construction
- 43 - Specialized construction activities
- 432 - Electrical, plumbing and other construction installation activities
- 4322 - Plumbing, heat andair-conditioning installation
In this section
TSIC 43221Water plumbing and drain laying insta llationTSIC 43222Plumbing, heat and air-conditioning installationTSIC 43223Air conditioning and ventilation installation