All of the UK’s water companies are facing a huge investment requirement to their storm water overflow systems now and into AMP 8. The lack of investment from water companies has been hugely highlighted by many campaigners and is seen in the news an a weekly and daily basis. The impact on the environment and public health has raised significant concerns and with our weather patterns changing , increased pressure has been put on storm water overflows as they play a crucial role in managing excess rainwater during heavy downpours.

The real issue is that during heavy rainfall storm overflows release untreated sewage and rainwater into our rivers and seas causing pollution ( bacteria, chemicals and microplastics) affecting water quality and causing harm to river and marine life and the public using our rivers and beaches. Due to climate change we see more of these overflows occurring due to increased rainfall

So how can HUBER Technology , who have recently celebrated their 30th anniversary in the UK and our parent company celebrating 150th anniversary help provide these solutions.

Well the easy answer is that we have been providing these solutions for the last 25 years so its nothing new to us as a leading wastewater equipment supplier. Both the HUBER Storm Screen RoK1 0° and 60° were introduced in 1995 and the HUBER Storm Screen RoK2 was introduced slightly later in 2003 – with 1500 UK installations. The main difference between the RoK 1 and RoK 2 is:

0° RoK1 screen – Located on the spill side of the weir this screen offers the lowest head solution for sensitive networks where any increase would be detrimental.

60° RoK1 screen – Mounted on top of the weir this screen is the go to one for low sided weir applications and when there is limited space behind the weir.

RoK2 screen – This upward flow screen is located on the wet side of the weir and is therefore ideal for high sided weir applications.

The RoK range of storm screens are controlled by a single upstream ultrasonic level transducer. The screen runs continuously when water levels exceeds weir level, screens working on pumped flows have an intermittent reverse to prevent hair pinning. When the water level drops below weir level the screen runs on for a period equal to 1 minute per metre length of screen. This ensures the screen is cleared of screenings prior to the next event.

HUBER also offer a safety feature making it safer to maintain the storm screens when installed in pumping stations or deep chambers, the RoK range of screens can be supplied with lifting cradles and guiderails negating the requirement for O&M staff to enter chambers.

With the current forecasted storm screen installations that will need to be completed over the next 5 years many water companies are looking to HUBER and their offering of DfMA solutions.

This approach has the potential to make time and cost savings to:

  • Optioneering / investigation work / overall programme, Procurement process
  • Construction = reduced construction period (especially important when the installation is in a road / carpark/public space)
  • Reduced lead times where we could manufacture screens from stock ( when given visibility)
  • Reduced design activities- HUBER familiarity with known chamber sizes
  • Efficient design review, ALM & HAZOP studies
  • Reduced embodied carbon
  • Improved cost certainty

The main features and benefits of the HUBER RoK range of storm screens include-

  • Suitable for double digit spills flows up to 6,000l/s
  • Standard modular design – 4 diameters & 625 mm incremental lengths up to 10m
  • IP68 II 2 G EEx II T4 IP68 geared motors- 0.63 to 2.2 kw suitable for up to 5 m submersion
  • 6 mm perforated plate – 4 mm tested
  • All stainless steel construction
  • Lowest WLC and a simple and uncomplicated operation
  • Developed to meet WaPUG Guidelines and WIMES compliant
  • 1500 UK installations

Further details are available on our website or to discuss your requirements please contact