Plumbing CROSS CONNECTIONS - Health & Safety Risks from Plumbing Cross Connections. Definition of plumbing cross connection: a plumbing cross-connection is defined as any physical connection or arrangement between potable water and any source of contamination.Examples of cross connections are shown at left.
The difference between these two types of cross-connections is very simple. A direct cross-connection is subject to backpressure (as shown above); an indirect cross-connection is not subject to backpressure. An example of a direct cross-connection would be the make-up water line feeding a recirculating system.
What is a cross-connection? A cross-connection is a direct arrangement of a piping line which allows the potable water supply to be connected to a line which contains a contaminant. An example is the common garden hose attached to a sill cock with the end of the hose lying in a cesspool. Other examples are a
Cross-Connection Control for Small Water Systems March 2004 Chapter 2 Page 3 Chapter 2. Introduction 2.1 Overview of Cross-Connection Control A cross connection is defined as any actual or potential physical connection between a public water system or the consumer's water system and any source of non-potable liquid, solid, or gas that could
cross-connections and prevent backflow situations. The public water supplier must conduct cross-connection control inspections of their water customers’ property to evaluate cross-connection hazards. Local ordinances or water department regulations also exist that must be followed in addition to state regulations.
EXAMPLES OF ACTUAL CROSS-CONNECTION CONTAMINATION EVENTS . 1. DATE OF BACKFLOW INCIDENT: June, 1979 . LOCATION OF INCIDENT: Meridian, Idaho . SOURCE(S) OF INFORMATION: - American Water Works Association, Recommended Practice for Backflow Prevention and Cross-Connection Control, AWWA Manual M14, Section Edition, 1990 - Pacific Northwest Section ...
Below are some examples of cross-connections and backflows that have occurred in other localities. Garden Hose Contamination caused by an exterminating company In Roanoke, Virginia on October 1979 Chlordane, a highly toxic insecticide, was backsiphoned into the water supply.
An example of this type of reinspection is a yearly visit to a facility with a chemically treated boiler with an RPZ device installed. 2. A visit made at the request of a customer due to flow, water quality, or other problems, during which the water utility checks for cross connections. An example of this type of reinspection
Cross-connections’ Contamination Woes. By Robert W. Powitz, Ph.D., MPH, RS, CFSP. In all the years I worked as a regulatory sanitarian, I cannot recall many instances where I did not find some violation of the plumbing system’s installation during my inspections, principally cross-connections of one type or another.
The City of Grandville is committed to protecting our drinking water system from contamination. One of the ways that contamination can get into the water system is through a cross connection. A cross connection can be an actual or potential connection between a drinking water supply and a source of contamination. How can a cross connection occur?