Molendinar Backwash System & Electrical Upgrade

About the project

The Molendinar Water Treatment Plant is the largest treatment plant on the Gold Coast, servicing the majority of the region. Pensar was engaged for the upgrade of the backwash and electrical systems. This project is the largest upgrade to this treatment plant since it was built in the 80s and will ensure future capacity and reliability of the treatment plant, to service the growing community.

Key Capabilities

Water & wastewater treatment plant works, Low & high voltage installations, Specialised commercial, industrial, & municipal buildings

Project Location

Molendinar, Qld

Client Name


Project Duration

March 2018 - July 2019

Project Value

$5 Million

Project scope

  • Upgrade of the existing backwash system – pump and blower replacement and pipework modifications
  • Upgrade of the fire service water system
  • Upgrade of the existing electrical system – switchroom and switchboard upgrades
  • Construction of new blockwork building
  • Provision of new back-up power system
  • Removal of redundant mechanical, electrical and civil equipment and infrastructure
  • Modifications to the Control System and SCADA


  • Coordination and planning with relevant stakeholders to shut down the entire Water Treatment Plant for 10 weeks
  • Fabricate and connect new DN750 mild steel pipework, valves and fittings into existing filters
  • Pensar delivered the entire design and construct project utilising our electrical, mechanical, civil, and structural capabilities