NRW as % of SIV fails again

Friday, October 13th, 2017

CASSA: A Romanian NRW

 Reduction Success Story

But not if % of SIV is used to assess progress!

How much longer must professional NRW and leakage management specialists suffer from having their targets and performance assessed using a performance indicator which simply doesn’t work anymore? After considering yet another NRW success story which is being undermined by use of NRW as a % of System Input Volume as a KPI for assessing progress, this blog suggests possible motivations of individuals, national and international organisations which continue to use % of system input volume to set targets, monitor progress and try to compare performance in NRW and leakage management.

Continue Reading »

WDSA History Project

Wednesday, October 4th, 2017

ASCE/EWRI Water Distribution Systems

Analysis History Project

YouTube interviews with over 50 WDSA specialists

As knowledge relating to the design, operation and management of water distributions systems continues to grow, LEAKSSuite users may be interested to find out more about the background, experience and motivation of some of the people who have made significant contributions to this topic over the last 40 years or so. In the UK, distribution then used to be referred to as the ‘Cinderella’ of the various functions of a Water Utility, but now it is front and centre of the modern management of finite water resources for rising populations.

Continue Reading »

Realistic modelling of pressure-dependent leakage

Sunday, September 24th, 2017

CCWI 2017 Pressure & Leakage Workshop


Academics and Practitioners use the same theory

for different applications

Two papers at the CCWI 2017 Conference in Sheffield, elaborated at a post-conference Workshop, showed how a recent collaborative research effort to improve the understanding of pressure:leak flow rate relationships anticipated, and successfully bridged, the gap between academic research and fast-track applications by practitioners. The 20 Workshop delegates – a mix of international academics and consultants, UK Utility practitioners, researchers and equipment suppliers – recorded very high satisfaction ratings for overall assessment (92%), expectations met (97%) and applicable knowledge gained (92%). How was this knowledge transfer achieved?

Continue Reading »

Ofwat PR19 endorses UARL

Sunday, July 30th, 2017

Ofwat considers SELL leakage targets not

challenging enough

England & Wales Water Company performance

commitments to be compared to UARL

Ofwat’s PR19 consultation document ‘Delivering Water 2020: Consulting on our methodology for the 2019 price review’ proposes a fundamental change in approach to encourage England and Wales Water Companies to achieve stretching and ambitious performance commitments for leakage, in the interests of long-term Water Resources planning. For the last 20 years, Ofwat’s requirement for Companies to robustly calculate and achieve economic and sustainable leakage levels (ELL and SELL), to deliver benefits to customers, has driven the England and Wales Water Companies to their existing levels of leakage management.

Continue Reading »

Pressure Leak Flow Relationships

Saturday, June 10th, 2017

Updates on Applying FAVAD Concept

Hydraulic Analysis and Fast-Track Applications for Practitioners

Outcomes of collaborative research by the University of Cape Town and several international leakage practitioners, to improve both theoretical understanding and practical application of the Fixed and Variable Area Discharges (FAVAD) concept for pressure:leak flow relationships, will be publicly available by mid-September. A common basic philosophy has been used to model hydraulic laboratory studies of both leakage and intrusion flows through leak openings in pipe samples, with fast-track analysis and prediction applications for practitioners using pressure management to reduce leakage in water distribution systems.

Continue Reading »

Pressure Transient Awareness

Thursday, May 18th, 2017

Pressure transients – seeing is believing

Hidden transients cause leaks, raise repair costs,

reduce asset life

Would you like to see what a pressure transient looks like – not just as a graph, but as a visible reality? Read on to access a startling media clip of transients generated in an above ground mains test rig, and then consider what damage may be done to underground distribution systems by pressure transients. International leakage management specialists who contributed to this blog are very well aware of the adverse effects of such events. However, many Utilities do not routinely take short-period pressure measurements to check for the presence of transients; or they may consider that if transients exist, they probably do not significantly influence leakage, burst frequency and infrastructure life.

Continue Reading »

WWi’s Top 25 Leaders 2017   

Monday, January 23rd, 2017





Water and Wastewater International magazine’s Top 25 Water Leaders Listing, now in its third year, opens 2017 by ‘showcasing leadership talent – whether it’s founding and growing a Company from scratch, or adapting a well-established Corporation to weather economic and market changes’.  This annual poll of WWi readers has voted Allan Lambert, founder of the ‘free to all’ LeaksSuite website, as 17th of Top 25 International Water Leaders, and the only UK-based individual in this year’s awards. Continue Reading »

Managing NRW – Roof Storage Tanks & Intermittent Supply

Tuesday, December 6th, 2016

Masterclass for Aguas de Saltillo with

international experts

Nov 2016, Llandudno

Some of the concepts and practical approaches now available for managing NRW become more difficult to apply when water is delivered to consumers through large roof storage tanks, rather than by direct pressure. Where supply is also intermittent, the problems of quantifying and reducing NRW are then compounded by excessive frequencies of leaks and bursts, damage to the distribution system and impairment of meters, and reduction of asset life. The recommended solution is to move to a 24/7 policy of continuous supply, but this is easier said than done. However, some Utility systems (Malta), and Malta and Cyprus case studies in with roof storage tanks have achieved continuous supply with ILIs close to, or even below, 2.0

Continue Reading »

Free Water Balance and KPI software

Saturday, August 6th, 2016

EurWB&PICalcs now available in Greek

As part of the co-operative effort to introduce and promote the recommendations of the EU Reference document Good Practices on Leakage Management (2015) throughout Greece, the Hellenic Water Association (HWA) has been working with the Technical Committee of the Municipal Water Works Association of Greece (EDEYA) to produce a Greek language version of the EurWB&PICalcs Water Balance and Performance Indicators free software, which is based on IWA Water Loss management practices.

Continue Reading »

Interpreting Leakage in England & Wales

Wednesday, May 25th, 2016

England & Wales Water Company Leakage

Rises – or Falls?


Consumer Council for Water Report confuses interpretation of

leakage statistics

Engineers and Scientists are often accused of failing to communicate effectively by using terms that are ‘hard to understand’ for media and the public. Some organisations and individuals believe they can simplify and improve the published message, but instead corrupt the output, by failing to recognise the difference between ‘evidence’ and ‘interpretation’. If, in public relations, ‘perception is reality’ then what responsibility should publishers of reports accept for confusing, rather than informing, on key issues?

Continue Reading »