Cross Connections 6-44. Cross Connections 6-44. Throughout the ship, where ever a hose bibb faucet permits connection of a hose to the potable water system, a reduced pressure backflow preventer must be installed.
Examples are deep sinks, and galley and weather deck washdown faucets.
The reduced pressure backflow preventer must be a model approved by the Foundation for Cross-connection Control and Hydraulic Research, University of Southern California, Los Angeles, CA 90012. During the course of sanitation inspections, water surveillance inspections, and while collecting water samples and performing halogen residual tests, Medical Department Representatives should routinely observe for cross connections. Modification or repairs to existing potable water systems aboard ship should alert the Medical Department Representative to the potential for cross-connection problems. Frequent discussion with engineering personnel regarding the potable water system and any repairs or proposed changes may be extremely beneficial in preventing cross connections. If a cross connection is suspected or identified, act quickly and effectively to determine if an unsatisfactory condition exists.