Frequently Asked Questions

1. What is a cross-connection?

2. What is the most common form of a cross-connection?

3. Who is responsible for determining whether or not a device is needed?

4. Why does the Hicksville Water District have a cross connection program?

5. How often does the device need to be tested?

6. Why do I need a backflow prevention device?

7. Are there different types of backflow prevention devices?

Q: What is a cross-connection?
A: It is a situation where there is a direct arrangement of a piping line which allows the potable water supply to be connected to a line which may introduce a contaminant. (top of page)

Q: What is the most common form of a cross-connection?
A: Ironically, the simple garden hose is the most common offender, as it can be easily connected to the potable water supply and used for a variety of potentially dangerous applications such as filling swimming pools or fertilizing the annuals. (top of page)

Q: Who is responsible for determining whether or not a device is needed?
A: The Hicksville Water District is required to determine the degree of hazard that a facility may pose to its public water supply system and will decide on the installation and maintenance of an acceptable backflow prevention containment device. Ultimately, the customer has the primary responsibility of preventing contaminants from entering the potable water supply. (top of page)

Q: Why does the Hicksville Water District have a cross connection program?
 A: As mandated by state law; “the supplier of water shall protect the public water system by containing potential contamination within the premises by requiring back flow prevention devices installed and tested.” (top of page)

Q: How often does the device need to be tested?
A: The law requires that all installed back flow services be inspected annually by a certified backflow tester. A list of qualified testers may be obtained from the Nassau County Health Department at (516) 571-3323. (top of page)

Q: Why do I need a backflow prevention device?
A: The Hicksville Water District requires the devices to protect the public water supply against contamination. (top of page)

Q: Are there different types of backflow prevention devices?
A: The most common type is a Double Check Valve (DCV), which are required for residences with underground sprinkler systems. It is designed to contain water within the sprinkler system. (top of page)