Attachment 3 - PG-18-10 Section 4.10.pdf

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Attached to
J045--Annual Backflow Inspections and Repair Services
Solicitation number
36C24126Q0744
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About this file

This is a Plumbing Design Manual for the U.S. Department of Veterans Affairs dated March 1, 2006.

The manual establishes comprehensive plumbing design standards and guidelines for VA facilities. It addresses water supply and distribution systems, including hydrants, water quality coordination, coordination with local authorities, and requirements for confined space hydrants to minimize the run-out length of piping. Key design parameters include provision of a maximum of 61 meters (200 feet) apart at building locations, with all water-freeze conditions and adequate meter sizing. The document specifies that designs will coordinate electrical supply to pumps, electronic water coolers, and related systems. Sanitary wastewater systems require backflow preventers conforming to ASSE 1013 standards with protection against a double check backflow preventer, and mandate inclusion of separate service entries for water distribution and pressure reduction. Additional requirements cover fire sprinkler systems and standpipes with standard connections and protective measures. Hose connection vacuum breakers are specified for equipment protection, requiring permanent installation in the following: deionizers, deniers, silt valves, power washers, and various distribution systems. The manual emphasizes pressure-reducing valve systems to minimize water use and prevent domestic hot water heating system degradation while maintaining backflow protection against backwater formation to ASSE 1013 standards. Atmospheric breakers, quick couplings, and three-threaded outlets for applicable systems are required components. Additionally, the document outlines glass waste basins, sink/closet water outages, ventilation systems, and firm processors to ensure all systems comply with VA specifications and site conditions.

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