Cross-connection is any actual or potential physical connection between a potable water line and any pipe, vessel, or machine containing a non-potable fluid or has the possibility of containing a non-potable fluid, solid or gas, such that it is possible for the non-potable fluid, solid or gas to enter the water supply is connected, directly or indirectly, with any non-potable or unapproved water supply system, sewer, drain, conduit, pool, storage reservoir, plumbing fixture, or any other device which contains, or may contain, contaminated water, liquid, gases, sewage or other waste, of unknown or unsafe quality which may be capable of imparting contamination to the potable water supply as a result of backflow.  Bypass arrangements, jumper connections, removable sections, swivel or change-over devices, and other temporary, permanent or potential connections through which, or because of which, backflow could occur, are considered to be cross connections

What is a Cross-Connection ?
What is a Double check Valve Assembly (DCVA) device?
A double check valve assembly (DCVA) is  a mechanical backflow prevention device that consists of two internally loaded check valves.  It includes two shut-off valves and four test cocks.  With the two check valves in series, a DCVA prevents backflow even if one check valve fails to close tightly.  It can be used to prevent backflow due to both Back-siphonage and Back-pressure where a minor or moderate hazard exists.  Since no visible warning is given of a failure of check valves, a DCVA must be tested at leas annually to ensure proper operation.
What is backflow?
Backflow is a flow in reverse from the normal direction of flow in a piping system, which can cause contaminants to enter into the drinking water supply system.  There are two causes for backflow:  Back-pressure and Back-siphonage.  Back-siphonage is caused by negative pressure in supply piping.
Cross-connection policy
Backflow testers

Fruitland Water has a contract with Cross Connection Specialists (Nancy Perry) and will apply an annual testing fee of $25 to your bi-monthly or monthly bill if you choose to use them for your testing.