Backflow Prevention

Backflow Prevention Device Testing?
Experience has shown that there is not a mechanical device that can be depended upon unless it is checked, tested and maintained on a regular basis.  Backflow Prevention devices are required to be installed in specific locations to protect the safety of the drinking water.  These devices must be tested on a regular basis.

Are there any regulations regarding backflow prevention devices tested?
Yes, the State of Michigan Department of Public Health, Administrative Rules for Michigan’s Safe Drinking Water Act, Act 399, P.A. 1976, current Michigan Plumbing Code, and Township Ordinance 38-245 Cross Connection Control (CCC) plan, have requirements.

How often do I have backlflow prevention devices tested?
All testable devices must be tested initially upon installation and should be tested on a regular basis. Residential homes must have their backflow prevention device tested every 5 years and commercial properties need their devices tested every year.  The Township inspector may require more frequent testing based upon degree of hazard, corrosive atmosphere or concerns with water quality.

How much will it cost to have my backflow prevention device tested?
The cost will vary depending upon the size of the device, the location of the device, and if the device is to be tested during normal working hours and which testing company will be doing the testing. We recommend getting multiple quotes as we have seen a wide range of pricing.

Who can test or install backflow prevention devices?
A certified backflow prevention device tester.  This is a professional who has an ASSE 5120 certification and must be or work under a master plumber.

Where can I obtain a list of certified testers?
Contact White Lake Township Water Department for a listing of testers at 248-698-7700 or the Michigan Department of Environmental Quality at 800-662-9278 or Hydro Designs, Inc. at 1-844-493-7646. Google would also be a good resource.

Are all backflow prevention devices testable?
No, not all devices can be tested. The testable backflow prevention devices are:

• Double check valve assembly
• Double detector check valve assembly
• Pressure vacuum breaker
• Reduced pressure backflow preventer assembly
• Reduced pressure detector assembly
• Spill resistant vacuum breaker

Will my water service be interrupted during the test?
Yes, the water supply to the backflow preventer must be turned off during testing.  Depending upon the type of device and the time for testing typically takes 10-30 minutes. Additional time may be needed for repairs, if required.

Are permits required?
No permit is required for device testing. The certified tester will complete a form with the necessary information required by the water utility.  This form should be copied and retained for your records.  The original should be submitted directly to the White Lake DPS. For commercial customers, contact Hydro Designs, Inc. for the proper form at 1-844-439-7646. The residential test form is at the link below.

What is a backflow prevention device?
Any device that has been approved to prevent backflow into the public drinking water supply. An approved backflow prevention device will prevent backflow-backsiphonage and backpressure.  The appropriate device will be determined during your inspection by the CCC inspector.

What is a cross connection?
A cross connection is a direct or potential arrangement of drinking water piping that is or can be connected to a questionable source.  An example is the common garden hose submerged in a swimming pool.  Other examples are supply line connected to boilers, process equipment or bottom-fed tanks.

What is back-siphonage?
Back-siphonage is the reversal of normal flow in a system caused by negative pressure (vacuum or partial vacuum) in the supply piping.

What factors can cause back-siphonage?
Back-siphonage can be created when there is a stop in the water supply due to repairs or breaks in the township water main or increased demand such as a fire.

What is backpressure backflow?
Backpressure backflow is the reversal of normal flow in the system due to downstream pressure being greater than the supply pressure.

What is the purpose of a cross connection program?
Under state law, each municipality is responsible to ensure that all connections to a public water system are in compliance with State requirements preventing the use of faulty cross connections or backflow devices contained within the water system.  As a result of these mandates, the Township of White Lake contracted with Hydro Designs, Inc. to inspect all commercial and industrial facilities within the township. White Lake DPS inspects all residendences connected to the Township water system.

Questions related to a cross connection program?
Please contact Hydro Designs, Inc. at 1-844-493-7646 or visit www.hydrodesignsinc.com for more information or contact White Lake DPS at 248-698-7700