NASA KSC STD Z 0013 : 1988

1.0 Introduction
1.1 Scope
1.2 General
1.3 Basic Goals of KSC Cross-Connection Control
2.0 Applicable Documents
3.0 Definitions
4.0 Requirements
4.1 Application of Devices
    4.1.1 Plumbing Fixtures
    4.1.2 Water Supply for Fire Systems
4.2 Test Cocks
4.3 Assembly Specifications
    4.3.1 Reduced Pressure Principle Backflow
          Prevention Assemblies
    4.3.2 Double Check Valve Assemblies
    4.3.3 Pressure Type Vacuum Breaker Assemblies
    4.3.4 Atmospheric Type Vacuum Breaker Assemblies
    4.3.5 Hose Connection Vacuum Breaker Assemblies
4.4 Design for Maintenance/Testing
    4.4.1 Reduced Pressure Principle
    4.4.2 Double Check Valve
    4.4.3 Pressure Vacuum Breaker
    4.4.4 Atmospheric Vacuum Breaker
    4.4.5 Air Gap
    4.4.6 Battery (Parallel Installation)
4.5 Design Parameters
    4.5.1 Nominal Size
    4.5.2 Rated Flow and Allowable Pressure Loss
4.6 Freeze Protection