Transcription of BACKFLOW PREVENTION - SPRINKLER TALK
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BACKFLOW PREVENTION - SPRINKLER TALK
Cross-Connection Control HandbookBACKFLOW 7/9/07 1:58 PM Page 1 Man has long recognized theneed for pure drinking water,but only in the last 50 or 60years has there been any realeffort to prevent contaminationcaused by double check valvescame into use around the turnof the century to isolate firemains and industrial water linesfrom the potable water supply,little interest was shown in theindividual treatment of plumb-ing 1929 the major breakthroughcame when a device consistingof two check valves with arelief valve between them wassuccessfully tested in Danville,Illinois. However, this valve wasnot produced commercially andit was not until the late 1930 sthat the real development ofeffective vacuum breakers andbackflow preventers took was in this period that ordi-nances for cross-connectioncontrol began to be Safe DrinkingWater Act, signed into law byPresident Ford, placed moreemphasis on the responsibilityfor drinking water need for cross-connectioncontrol exists in all types ofpremises, whether industrial orresidential.
Case No. 6 In August, 1969, 83 football team members and coaching staff were stricken with infec-tious hepatitis due to subsur-face hose bibs and a nearby
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