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Wilmington residents expect their water to be clean and safe.  For this reason, the City's Department of Public Utilities goes to great effort to ensure that the water delivered to your home is of the highest quality.

Water distribution systems are designed for water to flow only in one direction from the main to the customer.  However, there are conditions that take place within the system that can cause the water to flow in the opposite direction.  When water flows backwards in an unprotected system, it is called backflow.

Backflow can occur when pressure in the distribution system drops.  Examples of this are during fire fighting or when a water main breaks.  When this happens, and substance that may be in contact with the water line through a cross connection could be sucked into the system.  This type of backflow is called back-siphonage.

Backflow can also occur when an unprotected water supply line is attached to a container or pipe which contains substances under pressure, such as a boiler or a water circulation system.  Conditions can cause these substances to be pumped back into the water system through the cross connection.  This is known as back-pressure. (Source: Wilmington's Department of Public Utilities, Environmental Services Div.)

Backflow Prevention

Federal law requires the City of Wilmington to protect the water supply from potential contamination or pollution.

The City has developed and implemented an ordinance that requires all industrial, commercial and irrigation customers to install backflow prevention assemblies.  These assemblies must be installed on the customer's property.

After an approved backflow prevention assembly has been installed and tested, it must be re-tested annually.


Working Together

RJP Contractors would like to offer Home Owner's Associations a cost-effective, efficient process to annually test the backflow preventers.

Customers will receive a notice of the annual inspection.  Simply fax it to our office, we will schedule the inspection.  Homeowners do not have to be present for the inspection to take place.

Once the inspection is completed, RJP will complete the appropriate forms for City compliance and then the report will be cataloged by RJP to schedule the next annual inspection.