This is the 2026 TRA skills assessment guide for ANZSCO 334112 — A/C and Mechanical Services Plumber. For visa pathway selection see the 334112 pathway guide; for cost/timeline see the case study.
TRA pathways at a glance
| Pathway | Suitable for | Process |
|---|---|---|
| Offshore Skills Assessment (TRA OSA) | International tradies offshore | Documentary + practical / interview |
| Job Ready Program (JRP) | Onshore VET-graduate trades on 485 visa | 4-stage program |
Documents
- Certified copy of trade certificate(s) — Cert III in Plumbing (mechanical services) or international equivalent.
- Trade training transcripts.
- Detailed CV mapped to ANZSCO 334112 — projects, system types (chilled water, VRV, hydronics).
- Employment reference letters on letterhead with role, dates, hours/week, salary, mechanical-services-plumbing duties.
- Identity — passport bio page.
- Payslips / tax records.
- Brazing certification — for refrigerant pipework.
- Photos of work (sanitised).
- WHS / White Card (post-arrival).
ANZSCO 334112 task focus
Reference letters must show at least 65% time on A/C / mechanical services plumbing work:
- Chilled water (CHWS / CHWR) pipework — pipe sizing, routing, hangers, insulation.
- Condenser water (CWS / CWR) — cooling tower piping.
- Heating hot water (HHWS / HHWR) — boilers, distribution, manifolds.
- Hydronic heating — slab embedded, panel radiators, fan-coil units.
- VRV / VRF refrigerant pipework — Daikin VRV, Mitsubishi Electric City Multi, Mitsubishi Heavy Industries KX, Hitachi Set Free, Fujitsu Airstage, LG MultiV, Toshiba SHRMi.
- Brazing of refrigerant copper to AS / NZS 1571 standards.
- Pressure testing and nitrogen purging.
- Mechanical services pump / valve installation.
- BMS sensor / thermowell pipework.
- Cooling tower piping.
- Air handling unit (AHU) plumbing connections.
- Reading mechanical services drawings.
Useful certifications
- Certificate III in Plumbing (Mechanical Services) — Australian Cert III.
- State plumber licence with mechanical services endorsement — VBA, NSW Fair Trading, QBCC.
- White Card (CPCCWHS1001) — mandatory.
- Refrigerant brazing certification — for VRV / VRF work.
English
TRA OSA doesn't directly require English. Home Affairs requires Competent English.
Tools
Authoritative sources
Next step
Want a personalised TRA plan for 334112? Book a 30-minute free strategy call.
TRA
Airconditioning Plumber
Mechanical Services Plumber
ANZSCO 334112
Trade
Skills Assessment
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