Overview

ELIQUO HYDROK completed the installation of a 3m-dia x 3.5m-high CWF Storm Flush 'flushing bell' storm tank cleaning system as part of United Utilities' Salford 172 Project (Buffalo Court).

Challenge

The Salford 172 project includes a 4,500m³ new storm retention tank and diversion chamber designed to prevent discharge to the local watercourse during storm / heavy rainfall conditions. It is fed by the originally constructed 3m diameter Victorian sewer with potential flow up to 6,000 l/s in storm conditions.

The tank itself is a 21m-dia x 24m-deep excavation with secant pile walls requiring bespoke bracketry to be designed and manufactured to support the vacuum break pipe, break control pipe work and valve station.

Solution

ELIQUO HYDROK installed a 3m-dia x 3.5m-high CWF Storm Flush 'flushing bell' storm tank cleaning system.

ELIQUO HYDROK was able to install and fully commission the entire system, including carrying out a full flush, in just 2½ days.

Outcome

GCA, the principal contractor on the scheme, was delighted with ELIQUO HYDROK's performance, timely delivery and installation of the system. Alan England (GCA M&E Team Leader,) commenting on the witnessing of the full flush during commissioning, said: “on viewing the first 'Flushing Bell' operation, we were more than impressed at the efficiency of the system; the floor of the chamber was as clean as we had seen it!”.

ELIQUO HYDROK has completed many CWF Storm Flush 'Flushing Bell' installations for several Water Companies within the UK water industry.

The 'off-site' manufacture of the CWF Storm Flush minimises 'on-site' disruption by speeding up the installation process whilst offering a cost-effective solution. This technology provides a non-powered, zero maintenance flushing system that efficiently flushes the sediment deposited onto the floor of a storm water storage tank following each storm event.