Backflow Basics In Linden

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What is Backflow?

Drinking water flows from the source to your tap in pressurized water pipes. Typically it only flows in one direction, although under certain circumstances it can flow in the opposite direction, or “backflow.” This can be caused by things such as a water main break or high demand at a fire hydrant. When backflow occurs, water runs backward through the water system. The water flowing backward often is non-potable and might contaminate the drinking water supply.

What is Backflow Testing?

The majority of backflow assemblies include a check valve or valves and occasionally a relief valve. Each of these mechanical internal components must be tested annually and maintained if necessary. During a backflow test, the assembly is pressurized and then each part is isolated to ensure it is operating at an acceptable level. The check valves must hold a minimum pressure to pass the inspection and the relief valves must open before a certain pressure differential is reached. Repairs must be performed if minimum standards are not met.

What is a cross connection?

A cross connection is any connection between piping that carries drinking water and piping that carries non-potable water. When a cross connection exists, a backflow device is required so that the water’s taste or odor is not affected & harmful chemicals do not enter the drinking water. Common cross connections include sprinkler and irrigation systems, hot tubs, pools, fire suppression systems, radiant heating systems, boilers, soda fountain machines, and auxiliary water systems wells. If you have any of these, please call us today. We can help to ensure your water is safe.

Is testing required?

Numerous state regulations require all backflow prevention devices to be tested annually. These devices are required to keep the water that passes through them and into the plumbing system beyond them from coming back into the water supply, while protecting the quality and safety of the drinking water system. Just like the individual parts of your car, backflow prevention devices have parts that can break down and wear out. Annual backflow tests can help to ensure the drinking water supplied to your home remains safe. Not sure whether your system needs a backflow assembly device or an annual test?

Contact us today – call (209) 683-9245 or email us through the “contact us” link.

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  • What is a backflow preventer?

    A backflow preventer is a device installed in the plumbing system that prevents non-potable (not drinkable) water from mixing with clean drinking water. These devices commonly contain a number of valves that ensure that the stagnant and/or polluted water beyond the backflow preventer can never escape.

  • What does a backflow preventer look like and where is it located?

    Backflow preventers come in many shapes and sizes. The three main categories of backflow assemblies are:


    1.) Double Check Backflow Preventers - Double check backflow preventers consist of two check valves, four test ports, and two shut-offs and are commonly found in green rectangular irrigation boxes at ground level. These are also occasionally installed in crawl spaces, garages, and unfinished basements.


    2.) Reduced Pressure Backflow Preventers - Reduced pressure backflow preventers are composed of two check valves, a relief valve assembly, a sensing line, four test ports, and two shut-offs. These are required to be installed above ground – both indoor and outdoor – and sometimes in insulated hot boxes.


    3.) Pressure Vacuum Breaker or Spill Resistant Pressure Vacuum Breakers - Pressure vacuum breakers consist of a single check valve, an air inlet, two test ports, and two shut-offs. These devices are required to be installed above grade, and are almost exclusively found outdoors.

  • What is backflow prevention service?

    Backflow prevention service and inspection is vital to maintaining the quality of drinking water. The backflow preventer at your home or place of business is the only thing standing between your clean drinking water and potentially contaminated or stagnant water in auxiliary systems (such as irrigation systems, fire suppression systems, wells, pools, hot tubs, and boilers)


    It is crucial that backflow devices are inspected on a regular basis and receive maintenance as necessary. Nearby cities, central valley cities and the state of California require that each backflow preventer be inspected and pass inspection at least once per year. Your water provider is legally required to enforce this legislation and maintain a high level of compliance throughout their district.


    We offer backflow prevention services in:


    • Galt
    • Acampo
    • Lodi
    • Stockton
    • Linden
    • Lathrop
    • Manteca
    • Modesto
    • Tracy
    • Livermore

    If you would like to know more about backflow prevention service, please contact us at (209) 683-9245 with any additional questions.