RDJ
RDJ EngineeringFarm water & pumping design

Engineering design

Pump and water system design for anyone who needs it

Farms are where we started, but the engineering is the same wherever water has to be moved. If you have a job that needs pumps, pipes, tanks or the power to run them, we can design it.

Pump selection and replacement

Working out what a pump actually needs to do, choosing the right type and size, and checking a replacement will do the job of the one it replaces — or do it better.

Pipework and hydraulic design

Pipe sizing, friction losses, pressure at the far end, and where a system needs a relief valve, a check valve or an air release.

Motor, drive and power supply

Motor sizing on torque rather than guesswork, gearbox ratios, variable-speed drives, and what a site's power supply can actually start.

Pump stations and packaged systems

Duty and standby pumps, controls and instrumentation brought together into one system for wastewater, transfer and boosting duties.

Tanks, storage and water supply

Storage sizing, gravity and pressure supply, and level control for sheds, subdivisions, small towns and industrial sites.

Review and second opinions

A fresh look at a system that is not performing — undersized pumps, short-cycling, cavitation, high power bills — and what to change.

Who we work with

Farmers and rural landholders, mostly — but also builders who need a pump specified for a development, councils and water authorities with a small pump station to upgrade, workshops and small manufacturers with a process to supply, and contractors who want a design checked before they buy.

We have background in wastewater, mining and industrial pumping, and the same tools we use for farm systems handle those duties too. Read more about how pumps are used in wastewater, mining and light industry.

How a design job runs

  1. You tell us what the system has to do, and send whatever information you have.
  2. We confirm the scope and give you a fixed price for the design before any work starts.
  3. We do the design and send it back with the reasoning explained, not just the answer.
  4. If you want, we supply the equipment and support installation and commissioning.

Tell us about the job

No obligation — we reply within two business days.

No obligation — we reply within two business days.