hydrant maintenance Articles

  • Focus on jet fuel hydrant systems at airports

    It has been a productive 12 months for the Hydrant Sub-Committee of the Energy Institute's (El) Aviation Committee. Martin Hunnybun, El Technical Team Manager - Fuels & Fuel Handling, explains. As reported in the September 2012 issue of Petroleum Review. the recent past has seen much emphasis on highlighting/ communicating the existence of standards and recommended practices for aviation ...


    By Energy Institute (EI)

  • Major Urban City Projected To Save $77 Million Over Next Decade From Valve And Hydrant Asset Assessment Program

    For large urban cities, one of the quickest ways to realize an investment return from their network of underground assets is to inventory the water distribution system and assess the overall condition of valves and fire hydrants. This progressive major southeast U.S. ...


    By Pure Technologies

  • Virus contamination from operation and maintenance events in small drinking water distribution systems

    We tested the association of common events in drinking water distribution systems with contamination of household tap water with human enteric viruses. Viruses were enumerated by qPCR in the tap water of 14 municipal systems that use non-disinfected groundwater. Ultraviolet disinfection was installed at all active wellheads to reduce virus contributions from groundwater to the distribution ...


    By IWA Publishing

  • Numbers Speak Volumes: Water Distribution Assessment Increases System Operability To 84 Percent

    This large Midwest utility maintains and operates water collection, treatment, and distribution systems, as well as wastewater collection and treatment systems and stormwater management systems for its residential, business and wholesale customers in the region. To ensure the accessibility and quality of water services to meet the growing needs of the ...


    By Pure Technologies

  • Application of unidirectional flushing in water distribution pipes

    In this study unidirectional flushing (UDF) was conducted to improve the effectiveness of deposit removal from internal pipe walls and to provide information on pipe networks to enable operators to implement flushing in field. Four ductile cast iron pipes with epoxy-lined and cement-lined were selected for the practice of UDF. Water pressure was measured using a data logger equipped with a ...


    By IWA Publishing

  • Carrolloton Water Utility`s `Declaration of Competitiveness` the Challenges of Managed Competition

    ABSTRACTThe City of Carrollton (City) has embarked on a managed competition program encompassing a broad organizational wide effort to identify departments that would be candidates for partial or complete outsourcing. Carrollton’s Water Utility Division (WUD) has responded positively to this challenge, and their approach is an example of a progressive and proactive utility. They have initiated ...

  • What Causes Water Main Leaks?

    The number one cause of water leaks today and moving into the future will be the aging infrastructure. “A large part of the US public water system dates back to the years shortly after World War II, therefore, a significant amount of buried infrastructure is at or very near the end of its useful life.” – Qureshi & Shah, Journal AWWA. When aging infrastructure is combined ...


    By EnTech Engineering, Inc

  • Healthy Control Valves

    A simple maintenance routine can help ensure trouble-free valve operation. Whether the control valve in your system is the first one that has required maintenance or if you are experienced with maintaining multiple valves in your system, some simple guidelines can help keep them operating at optimal performance. Physically checking all valves at least every 12 weeks is important, assuming that ...


    By Singer Valve Inc.

  • Non-Revenue Water – A Growing Issue for Water Utilities

    Each day, billions of gallons of water are lost worldwide to various factors, including leaks, water main failures, theft and metering inaccuracies. Not only does this represent the waste of a precious resource that many people do not have reliable access to, it also represents a massive amount of lost revenue for the utilities that provide water services. In developed nations, ...


    By Pure Technologies

  • InfoWorks aids the introduction of Cambridge’s district meter areas

    Cambridge Water in eastern England has used InfoWorks WS to develop an all-mains model of the city’s distribution system and applied it to the design of district meter areas to help control leakage. Close correlation between model predictions and field testing has given the engineers confidence in implementing the new system, which is being carried out during 2008.  The networkCambridge ...


    By Innovyze

  • Asset condition estimation and depreciation

    Vitens is one of three water companies in The Netherlands, with 2.3 million connections, 5.4 million customers, 47,5000km of pipes and 96 treatment works that provide 330M.m3 a year of potable water at a cost of €1.32/m3 ($1.72/m3). Each day the company receives calls from customers reporting leaks. The maintenance division provides information on the pipe material and diameter, and the business ...


    By Innovyze

  • Renewing Belgrade’s Water Infrastructure

    After the trauma of the 1990s, new foreign and national investments in Belgrade’s water infrastructure is enabling the city to benefit from the latest advances in water supply technology… Introduction Situated on the banks of the rivers Sava and Danube, the citizens of Belgrade, the capital city of Serbia and Montenegro in the Balkans, have long benefited from ready access to water. ...


    By Innovyze

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