Self-regulating controlled water storm tank flushing

ELIQUO HYDROK's CWF technology offers an efficient and cost-effective alternative to the normal tipping bucket where storm tank cleaning is required. A traditional tipping bucket continually drip fills until it reaches tipping point to flush on a continuous cycle throughout the year. The CWF will only operate when it needs to, immediately after a storm event. The CWF can be utilised at the end of any length tank as an alternative to the traditional tipping bucket set-up.

Whereas the tipping bucket system needs a separate supply of water to fill all year around, the CWF uses the storm flow in the tank to fill and wash, so no separate water supply is required. The only moving part on the CWF is the non-return valve, which is an easily interchangeable off- the-shelf item which is quick and easy to replace. A tipping bucket is a heavy lumbering machine which, over time, has many points of failure. The CWF needs very little maintenance because of the few moving parts and when compared to the tipping bucket, it is a much quieter operation that happens less frequently.

Operating principle

The CWF storm flush is a simple method for sediment removal. Storm water is held in reserve in the storage reservoir, filled during the tank filling process during a storm. At the end of a storm event and after the system has emptied, the retained flushing water is released via the vacuum break within the flushing vessel. This creates a RFP (Roughing, Fine and Polishing) staged flushing regime which mixes and carries the sediment from the base of the tank to the receiving sump.

Features and benefits

No power requirement, or controls
No external water supply requirements
Only operates when required after a storm event
Suitable for new tanks and retrofit to existing tanks in place of tipping bucket
Reduced noise and frequency when compared with a traditional tipping bucket
Flushes even after partial fillings
Fully self-priming and flushing operation
Can be used in rectangular, square and circular tanks
Suitable for both open and below ground installations
Only one moving part
Intrinsically safe
Utilises storm water for the flushing process
Final flush polishing stage utilises settled storm water
Synchronised flushing of multi-unit installations within larger tanks
Low maintenance
Suitable for unscreened flows
Offsite manufacture and minimal on-site installation

CWF lane storm flush - alternative to tipping buckets

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