摘要:

An important aspect of valve care and maintenance is keeping accurate records. Current maps of the distribution system should contain information such as the location, type, size, direction of opening, number of turns to fully open from fully closed, and the numbers of the valves.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1977.tb01042.x

出版商:Wiley    

年代:1977

数据来源: WILEY

摘要:

Featured in this month's “Gimmicks and Gadgets” is a device for calibrating fluoride pumps.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1977.tb01044.x

出版商:Wiley    

年代:1977

数据来源: WILEY

摘要:

The questions in this month's “Certification Corner” include such topics as detection of gas chlorine leaks, centrifugal pumps, Anabaena, recarbonation, coagulation and sedimentation.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1977.tb01046.x

出版商:Wiley    

年代:1977

数据来源: WILEY

摘要:

Suggested guidelines for operators to follow when selecting water supply sources are presented. Federal regulations, sources of pollution, monitoring activities, hazardous materials spills, and emergency planning should be some of the considerations taken into account during the selection process.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1977.tb01047.x

出版商:Wiley    

年代:1977

数据来源: WILEY

摘要:

Electrical thawing is a quick and easy way to unfreeze water pipes. A table of current and voltage requirements is provided as well as the procedures for using a direct‐current generator and a generator with alternating current.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1977.tb01048.x

出版商:Wiley    

年代:1977

数据来源: WILEY

摘要:

The Multiple Tube Fermentation test is discussed as it relates to the Safe Drinking Water Act and Maximum Contaminant Levels in water.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1977.tb01049.x

出版商:Wiley    

年代:1977

数据来源: WILEY