Arizona Backflow Certification - We make it easy for your business or residence to be compliant with your backflow prevention systems. [Flagstaff, Arizona]

Arizona Backflow Certification - We make it easy for your business or residence to be compliant with your backflow prevention systems. [Flagstaff, Arizona]

Arizona Backflow Certification - We make it easy for your business or residence to be compliant with your backflow prevention systems. [Flagstaff, Arizona]   Arizona Backflow Certification - We make it easy for your business or residence to be compliant with your backflow prevention systems. [Flagstaff, Arizona]

We make it easy for your business or residence to be compliant!

 

Frequently Asked Questions [FAQ's] about Backflow Prevention, Testing and Certification

Back to Homepage

 
The following FAQ's are provided by the Backflow Prevention Unit of the City of Phoenix (Development Service Department). They do a great job discussing the ins-and-outs of Backflow Prevention and Certification, and so we decided it would be a great way to help our customers understand what we do. If you have additional questions and/or would like to schedule an appointment with us, please don't hesitate to contact us.
 
Arizona Backflow Certification - We make it easy for your business or residence to be compliant with your backflow prevention systems. [Flagstaff, Arizona]

 

Arizona Backflow Certification - We make it easy for your business or residence to be compliant with your backflow prevention systems. [Flagstaff, Arizona]
 

Questions and Answers About Backflow Preventers
click on the images below for a larger view

 
What is a backflow prevention program?  A mutual effort between water companies, property owners and certified testers to educate the public about backflow prevention requirements. These requirements ensure that established guidelines are followed to protect the public drinking water supply.

What are we protecting the public supply from?  How?  Our goal is to protect the drinking water supply from pollutants or contamination. We do this by keeping water that has already entered a facility from flowing back into the public water system. Backflow prevention assemblies are the devices used for this purpose.

What is the difference between pollution and contamination?  Pollution of the water supply does not constitute an actual health hazard, but the water may taste, smell, or look objectionable. Contamination of the water supply constitutes an actual health hazard, with the consumer being subjected to potentially harmful water borne disease or chemicals.

What causes water to flow backward?  Two things: backsiphonage and backpressure.

A drop in water pressure due to a break in the water main may cause water to flow in reverse. This allows contaminated water to enter the main. Courtesy of Arizona Backflow Certification [Flagstaff, Arizona]What is backsiphonage? Backsiphonage is created when there is a sudden drop in water pressure in water mains due to breaks or nearby firefighting efforts.

What is backpressure?  The reversal of normal flow due to downstream pressure being greater than supply pressure.

What causes backpressure?  Heating systems, elevated tanks, and pressure producing systems can create pressure in the customer's plumbing which exceeds the supply pressure. An example would be a boiler operating at 100-150 lbs. pressure (as in a commercial system). A diagram of a backflow system showing where the contanimated water stops and how the normal flow of water should work. Courtesy of Arizona Backflow Certification [Flagstaff, Arizona]Since a city's water pressure is usually about 60 lbs. and water flows in the direction of least resistance, a back pressure would be created. The contaminated boiler water could flow into the drinking water supply.

What is a backflow prevention assembly?  What is its purpose? Where should it be installed? A backflow prevention assembly is a testable device which uses spring loaded check valves to prevent polluted or contaminated water from flowing backwards. Some assemblies eliminate backflow by discharging used water to the ground. Assemblies installed as secondary protection shall be located as close as possible to the water meter or property line.

Why can't I just use check valves as a backflow prevention assembly?  A check valve is not equipped with test connections to assure that the valve is preventing backflow. That's why only approved assemblies are allowed.

What is an approved assembly?  Any type of backflow prevention assembly or method approved by the Arizona Department of Environmental Quality (ADEQ).

Rick Wright, certified and licensed backflow tester, working on a backflow system to make sure it is functioning properly - Arizona Backflow Certification [Flagstaff, Arizona]Can anybody test backflow prevention assemblies in Arizona?  No, only people certified through an agency approved by ADEQ can test backflow devices. A copy of his/her certification must be on file with the Backflow Prevention Unit.

Who is a certified tester?  Any person trained to test a backflow prevention assembly. This person must pass a written and practical examination and have the certificate described above. Arizona Backflow Certification has certified testers!

Is it necessary for every water customer to install an assembly?  No. State regulation exempt most single family homes used solely for residential purposes from assembly requirements. All other service connections need to be inspected to determine the type of water use and whether an assembly is required. The state however leaves it up to the local water company to make the final determination in regards to protecting their clean water supply.

If my building was recently modified to meet city code requirements by installing backflow preventers internally, do I still need them at the service connection?  Even though plumbing code provisions may be rigidly enforced on new installations, experience has shown that "on-site" modifications and alterations of private plumbing are common. Possible hazards to the public water supply can be created due to backflow from private plumbing. These hazards may be caused by a submerged hose or a complex mechanical failure. In some cases, the only practical way to assure protection is to install a backflow preventer at the point of service delivery. That way, regardless of what happens inside the customer's property or what changes were made to private plumbing, the public water supply is protected.

Where do I get a permit to install a backflow prevention assembly?  Permits are issued by the city's Development Services Department. If the service is for a fire sprinkler system, an additional permit is required from the Fire Department.

What happens after I install the assembly?  It is your responsibility to have the assembly tested when it is installed and each year thereafter. A copy of the test report showing that the assembly passed is to be forwarded to the Backflow Prevention Unit. The city code requires that test records be kept for three years.

What is an assembly test report and where can I get one?  A special report form approved by the city used by certified testers to log test results. The tester (Arizona Backflow Certification) you hire will supply the report form.

 

If you have more questions or wish to make an appointment, please don't hesitate to contact us!

We double check your valve assembly to make sure that the normal flow of water occurs and that there is no reversal in water flow. Courtesy of Arizona Backflow Certification [Flagstaff, Arizona]

Arizona Backflow Certification is Licensed & Insured to provide Backflow Testing!

 

Back to Homepage

 
Arizona Backflow Certification - We make it easy for your business or residence to be compliant with your backflow prevention systems. [Flagstaff, Arizona]   Arizona Backflow Certification - We make it easy for your business or residence to be compliant with your backflow prevention systems. [Flagstaff, Arizona]
 
Copyrightę2012-2017. All Rights Reserved. The content of this backflow certification and prevention website is owned
exclusively by Kara McAlister in conjunction with certified backflow testers for Arizona Backflow Certification [Flagstaff, Arizona].
 
Backflow Testing and Certification Website Designed by Reliable Web Designs