| Agfirst Engineering Ltd | Bay of Plenty / Gisborne / Hawke's Bay |
| Alpha Pipelines (2008) ltd | Bay of Plenty |
| Boraman Consultants | All |
| Dama Manufacturing Ltd | Auckland / Northland / Waikato |
| ENVCO | All |
| Environmental Consultancy Services | All |
| Hydro Logic NZ Ltd | All |
| Irrigation Services | All |
| Management Tools Group | Taranaki |
| Nevoda Equipment Company Ltd | Auckland / Waikato |
| Parkland Products Ltd | All |
| Professional Farm Services | Waikato |
| Propipe Irrigation Ltd | Bay of Plenty |
| Prosol | All |
| Scott Technical Instruments Ltd | All |
| Steve Miller Rural Services Ltd | Bay of Plenty / Waikato |
| Water Check | All |
| Water Meter Verification Ltd | Bay of Plenty |
| Water Supply Products | All |
| Waterforce | All |
| Agfirst Engineering Ltd | Bay of Plenty / Gisborne / Hawke's Bay |
| AG-FLOW | Manawatu |
| Bay Irrigation | Canterbury / Hawke's Bay |
| Boraman Consultants | All |
| EAM | Hawke's Bay |
| ENVCO | All |
| Environmental Consultancy Services | All |
| G V Electrical & Pumping | Wairarapa |
| Hydro Logic NZ Ltd | All |
| Irrigation Services | All |
| Ordish & Stephens | Wairarapa |
| Parkland Products Ltd | All |
| Prosol | All |
| Scott Technical Instruments Ltd | All |
| Water Check | All |
| Water Supply Products Ltd | All |
| Waterforce | All |
| Boraman Consultants | All |
| ENVCO | All |
| Envirolink Ltd | Canterbury / Marlborough / Tasman |
| Environmental Consultancy Services | All |
| Irrigation Services | All |
| Liquid Action Ltd | Canterbury / Marlborough |
| Parkland Products Ltd | All |
| Prosol | All |
| Renewable Energy Resources Ltd | Marlborough / Tasman |
| Scott Technical Instruments Ltd | All |
| Southern Water Engineering Ltd | Canterbury / Marlborough |
| Waimea Drilling Company Ltd | Tasman |
| Water Accessories Ltd | Marlborough |
| Water Check | All |
| Waterforce | All |
| Water Supply Products Ltd | All |
| Allied Water Systems Ltd | Canterbury |
| Aqualinc Research Ltd | Canterbury |
| Ashburton Contracting Ltd | Canterbury |
| Bay Irrigation | Canterbury / Hawke's Bay |
| Boraman Consultants | All |
| Bosch Irrigation Ltd | Canterbury |
| Busch Irrigation | Canterbury |
| ENVCO | All |
| Envirolink Ltd | Canterbury / Marlborough / Tasman |
| Environmental Consultancy Services | All |
| Grafton Irrigation | Canterbury |
| Grafton Irrigation Ltd | Canterbury |
| Irrigation Services (Southern) | Canterbury / Otago / Southland |
| Kirk Irrigation Ltd | Canterbury |
| Liquid Action Ltd | Canterbury / Marlborough |
| McNeill Nind Ltd | Canterbury / Otago / Southland |
| NIWA Ltd | Canterbury |
| Parkland Products Ltd | All |
| PGG Wrightson | Canterbury |
| Pivotal Irrigation | Canterbury |
| Plains Irrigators Ltd | Canterbury |
| Prosol | All |
| Quasar Systems Ltd | Canterbury |
| Rainer Irrigation Ltd | Canterbury |
| Ray Mayne Hose & Fittings Ltd | Canterbury |
| Scott Technical Instruments Ltd | All |
| Sicon | Canterbury / Otago |
| The Irrigation Warehouse | Canterbury |
| Water Check | All |
| Water Dynamics | Canterbury |
| Water Supply Products Ltd | All |
| Waterforce | All |
| Watermetrics (NZ) Ltd | Canterbury |