An accurate measurement of distribution Input (DI) is essential in understanding a company’s water balance – a 1% uncertainty in DI is more significant than a 1% uncertainty in any other component. For a large water company, some 2/3 of its DI can go through meters that are 500mm or larger. However there has been little independent testing of large diameter meters, although they play a significant role in the water balance and the final leakage number. We also know that flow conditions can influence their installed accuracy but most testing for disturbance effects has been carried out on small meters. There is emerging evidence that perturbations in flow continue for proportionally greater distances in large pipes compared to small pipes and therefore what steps should be taken to mitigate this?
A workshop was set up at the WRc office in Swindon for Tuesday 19th May (10:30am to 2:00pm) for water company representatives to discuss further research into this topic. Seveb water companies attended the workshop. We anticipate the workshop will lead onto a Portfolio project which will incorporate some large diameter independent testing. Input from other companies interested to help develop the project would be welcomed.
Please contact Andy Godley (firstname.lastname@example.org or 01793 865060) for further information.