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Residential and Commercial Customers

Backflow Requirements for Residential Customers

Residential customers are required to have a backflow preventer in the following cases:

  • You have an in-ground irrigation system connected to the Mount Pleasant Waterworks system
  • You have a private fire line system

 If you plan to install an irrigation system

 

  1. Install the backflow preventer. Be sure to install it according to Mount Pleasant Waterworks’ Cross-Connection Program Guidelines. We recommend hiring a professional installer. Inspection. Once it's installed, contact us to schedule an inspection.
  2. Initial and Annual Test. Fill out the Cross-Connection Control Program Annual Testing Agreement and we will take care of the test for you.  

Backflow Requirements for Commercial Customers

We evaluate backflow requirements for businesses on an individual basis when a water account is established.

Businesses that present a potential backflow hazard are required to install the appropriate backflow prevention device and have it tested annually.

We determine backflow hazard by evaluating the type of business, how the business uses water, and what type of equipment or appliances are connected to the building’s water supply system.

If a backflow preventer is already installed

If your commercial property already has a backflow preventer, it is required to be tested annually. Enroll in MPW's Annual Backflow Testing Program Now.

If you are required to install a backflow preventer

Mount Pleasant Waterworks will notify you by mail if a backflow preventer must be installed.

Follow these steps:

  1. Install the backflow preventer. Be sure to install it according to Mount Pleasant Waterworks’ Cross-Connection Program Guidelines. We recommend hiring a professional installer.
  2. Inspection. Once it's installed, contact us to schedule an inspection.
  3. Initial and Annual Test. Fill out the Cross-Connection Control Program Annual Testing Agreement and we will take care of the test for you.  

Private Authorized Testers (SCDHEC)

To access a list of authorized Backflow Prevention Device Testers click here.

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