摘要:

This article discusses the adjustment of pumping procedures as water usage rates change as a method of reducing power costs for pumping water. In general treated water is stored in ground‐storage tanks and then transferred to elevated storage tanks, by pumping, when the water level in the elevated storage tank falls below a preset point. The key idea in the cost‐cutting procedure is to lower the preset points during periods of low water consumption so that the pump is activated fewer times but runs longer. Research shows that it is more expensive to have the pump activated frequently for short periods of time than it is to have it activated less often but run longer.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1987.tb00463.x

出版商:Wiley    

年代:1987

数据来源: WILEY

摘要:

This article discusses the results of research into procedures for leak‐detection methods and the reduction of unaccounted‐for water. The procedure devised is labeled a “water audit”. The audit includes seven steps: perform a preliminary water audit, perform a testing program on source‐of‐supply meters, perform a testing program on commercial and industrial meters, perform a sample testing program on residential meters, perform a leak survey, perform a miscellaneous‐loss survey to determine the efficient operation of the water utility, and perform a water‐rate study to determine budgeted needs. Each of these steps is discussed briefly. Ways to obtain financing for such an audit are discussed as well as where increased revenues can be allocated.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1987.tb00466.x

出版商:Wiley    

年代:1987

数据来源: WILEY

摘要:

This article describes a tool which makes the repairing of service boxes much easier. Rather than having to dig a large hole in order to rethread the pipe or install an extension unit this tool can be used in a hole as small as 4 in.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1987.tb00464.x

出版商:Wiley    

年代:1987

数据来源: WILEY

摘要:

The new eductor system has replaced shovels and conveyor belts for moving filter media. The eductor creates a vacuum and moves the media in a slurry. This new system has no moving parts. Wear will only occur in the discharge area and the suction hose and nozzle, all of which are inexpensive to replace. The old system uses a centrifugal pump impeller which wears out rapidly. The editor notes that backflow prevention must be considered when using an eductor system.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1987.tb00465.x

出版商:Wiley    

年代:1987

数据来源: WILEY