Adequate clearances from floors, ceilings and walls must be provided to access the test cocks and to allow the repair and/or removal of the relief valve and check valves as follows: Ideally, the installation should not require platforms, ladders or lifts for access. General Installation DetailsĪll double check valve (DCV) and reduced pressure zone (RPZ) backflow prevention assemblies are designed for in-line service and must be installed to prevent freezing, flooding and mechanical damage with adequate space to facilitate maintenance and testing. They are to be reasonably interpreted and will be updated as new design solutions and technologies are offered. Pending revisions to the manual, these guidelines should clearly outline what an acceptable design and installation constitutes.
These guidelines reflect accepted design considerations based on experience in implementing cross connection control programs and policies set forth by the American Water Works Association, Environmental Protection Agency, USC Foundation for Cross Connection Control and Hydraulic Research and state and local health departments. The purpose of these guidelines is to augment and/or clarify those guidelines outlined in the January 1981 Cross Connection Control manual.
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Supplement to the 1981 Cross Connection Control Manual - January 1992 Purpose Guidelines for Designing Backflow Prevention Assembly Installations All Health Care Professionals & Patient Safety.Clinical Guidelines, Standards & Quality of Care.Health & Safety in the Home, Workplace & Outdoors.Birth, Death, Marriage & Divorce Records.
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