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Water meter installation guide
Sydney Water – Water meter installation guide Document current at March 2018 Page 5 Which meters have a backflow prevention device inside them? Only 20 mm and 25 mm meters have dual check valves inside them for backflow prevention.
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Chapter SPS 382, WISCONSIN, Series TK-9A Backflow, Backflow, ERRORS AND OMMISSIONS, Connecticut, Rules and regulations, Table of Contents, Application for Approval of Backflow, APPLICATION FOR APPROVAL OF BACKFLOW PREVENTION DEVICES, DEPARTMENT OF ENVIRONMENTAL PROTECTION, Department of environmental protection bureau, Application for approval of backflow prevention