5 drainage businesses are based in Knox with a licence on the QBCC register, mostly around Bayswater, Knoxfield and Rowville. Every listing shows its licence classes and when we last checked the register.
QBCC register checked 21 Oct 2026
| Business | Licences | Location | Contact | |
|---|---|---|---|---|
| D&e Air Conditioning Pty Limited | Gasfitting · Irrigation · Mechanical Services - Air-conditioning and Refrigeration (Limited Design) · Mechanical Services - Air-conditioning and Refrigeration (Unlimited Design) · Mechanical Services - Plumbing · Plumbing and Drainage | Rowville | Not listed | |
| Garth Terrance Patterson | Mechanical Services - Plumbing · Plumbing and Drainage | Knoxfield | Not listed | |
| Nathan Kent | Plumbing and Drainage · Roof and Wall Cladding | Bayswater | Not listed | |
| Techrest | Plumbing and Drainage | Wantirna South | Not listed | |
| True Blue Plumbing Australia Pty Ltd | Plumbing and Drainage | Bayswater | Not listed |
Gasfitting · Irrigation · Mechanical Services - Air-conditioning and Refrigeration (Limited Design) · Mechanical Services - Air-conditioning and Refrigeration (Unlimited Design) · Mechanical Services - Plumbing · Plumbing and Drainage
Rowville
Mechanical Services - Plumbing · Plumbing and Drainage
Knoxfield
Listings are built from the QBCC register, the Australian Business Register and business websites. Being listed is not an endorsement. No paid placements on this page. Source: QBCC Licensed Contractors Register, data.qld.gov.au, CC BY 4.0