Re-Use Final Rinse Water

Wash drum


The last hot (sterilising) rinse from plant washing can be saved and re-used as the first pre-rinse at next milking – saving 200-800 litres per day.

It is important that the pre-rinse water is warm (around 38oC) so the wash barrel should be covered and well insulated. 

Tips on Getting the Best Result

Insulation is important to prevent heat loss during storage.  Ensure the milking machine drains well after the each cycle to minimise contamination with detergents and milk residue. 

Pros and Cons

Relatively easy to do as equipment is already in place.  At present it is difficult to automate this or configure automated systems to save hot sanitising rinse. 

Issues in Making it Happen


Manual labour required to divert wash fluids.  OH&S issues with storage of hot water.

  • Water Saving
  • Low
  • Cost
  • Low
  • Effort
  • Moderate