What is a cross-connection?
A cross-connection is any actual or potential physical connection or arrangement between a pipe conveying potable water from a public water system and any non-potable water supply, piping arrangement or equipment including, but not limited to, waste pipe, soil pipe, sewer, drain, other unapproved sources.

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1. What is a cross-connection?
2. What is an air gap?
3. What is a reduced pressure zone assembly?
4. What is a double-check valve assembly?
5. What is an atmospheric vacuum breaker?
6. What is a pressure vacuum breaker?
7. What is a hose bibb vacuum breaker?
8. Why do backflow preventers have to be tested periodically?