03 8765 9500 | 02 8893 1241

March 2017: Recent Jobs of Interest: Fitting correct ball float, Noble Park

February 28th, 2017

We recently replaced a cooling tower ball float, to stop a cooling tower overflowing excessively.

Asset:  Evapco evaporative condenser


On inspection, we found the following:

  • The valve float was too small and not buoyant enough
  • The existing valve was a water tank design, not suitable for cooling towers.
  • The combination of the small float and the water tank valve was causing the assembly to bounce and the arm to bend upwards
  • The bouncing caused the valve to wear out and this stopped it shutting off.
  • The combination of the bent arm and the faulty valve caused the basin to overflow consistently.


We addressed the issue by replacing the flat ball float with a larger ball float. We also replaced the ball float valve assembly with a cooling tower-standard valve and arm.

  • Stainless steel rod, horizontal arm does not bend
  • Stainless steel threaded vertical rod to adjust the float level correctly
  • Heavy duty BOB brass valve
  • Float sits steady in the water, despite water falling onto it from above.

The system water level was then reset, and it was tested to ensure that the correct operating water level would be maintained.

The new design now sits in the water correctly and does not tend to bounce due to water falling on top of it.



   Unit 21, 21-22 National Drive, Hallam VIC 3803
   +61 03 8765 9500


   Level 7, 91 Phillip Street, Parramatta NSW 2150
   +61 02 8893 1241

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