Hydroflux Awarded Storm Screen for the Grassmere Wet Weather Storage Facility
October 29, 2026
The Grassmere Wet Weather Storage Facility located in East Papanui, in northern Christchurch, consists of a diversion chamber with a screen and penstock weir, followed by a wet well where the overflow is pumped to a 3,400 kL storage tank that is fitted with flushing and odour control, which in turn can release the flow in a controlled manner back to the network. The system will be designed to handle up to 150 L/s during a storm event.
As part of the works Hydroflux was awarded the design, supply and commissioning of a HUBER RoK2 storm screen. The screen will process up to 150 L/s of wet weather flow from the diversion chamber. Fitted with a 6 mm perforated screen the unit will remove unwanted screenings, plastics and other debris prior to being pumped to the storage tank.
The RoK2 is a horizontal screen that is fitted within an overflow weir, making it well suited to wet weather overflow screening.
It is commonly fitted at treatment plant intakes or for use in wet weather diversion and storage facilities.
To learn more about Hydroflux’s storm screening solutions, please visit www.hydrofluxepco.nz or call us on 09 352 2052.
About the Hydroflux Group
The Hydroflux Group aims to deliver the highest level of engineering and scientific expertise to address emerging challenges in sustainability, climate adaptation and environmental protection, with a specific focus on water and wastewater treatment.
Sustainability and environmental responsibility are central to Hydroflux’s vision and mission. The Group is committed to supporting customers and industry partners in achieving their environmental objectives through innovative water and wastewater treatment technologies, resource efficiency and sustainable solutions.
The Group employs over 100 staff and operates throughout Australia, New Zealand and the Pacific Islands, with offices in Sydney, Melbourne, Brisbane, Adelaide, Perth, Auckland and Suva.
