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Seneca Light & Water(SL&W) Cross-Connection Department locates and oversees backflow devices within our area and ensures that each one is tested annually. The Cross-Connection Department considers any actual or potential connection between the public water supply and a source of contamination or pollution a hazard and will require a testable backflow device. When a backflow has been installed, it will be inspected by a SL&W inspector. After the initial inspection, a reminder will be sent every year to the person responsible for the property where the backflow device is located. These tests can only be performed by SCDHEC certified tester that is permitted by the Seneca Light & Water Cross-Connection Department.

Why We Protect?

All plumbing systems have cross-connections with the potential for backflow. With a cross-connection there is a possibility of contaminated or polluted water entering into the public water system through backflow. This can cause the water to look cloudy, smell foul, and taste bad. In worst cases, it can cause sickness and even death.

What is a Cross-Connection?

A cross-connection is a permanent or temporary connection between the public water system and a source of water that may be contaminated or polluted due to backflow.

What is Backflow?

Backflow is the flow of water and/or other substances entering into the drinking water supply form any source other that the water distribution pipes. There are 2 types of backflow:

Backsihonage: This type of backflow occurs when there is a reduction of pressure in the water distribution system (e.g., a water main break, a shutdown for repair, or a high demand for water due to fire fighting).
Backpressure: this type of backflow occurs when there is greater pressure from a source other than that supplied from the water distribution system (e.g., a pump for a pond or pool, an irrigation system).

Where are Cross-Connections Found?

Cross-Connections can be found anywhere there is a connection to the public water system such as: Irrigation systems, laboratories, fire sprinkler systems, swimming pools, hospitals, mortuaries, clinics, car washes, sewage treatment plants, etc. Did you know that over half of the nation's cross-connections are found on unprotected garden hoses? When a hose is submerge in water the contents of the hose and any substance that the hose is connected to can backflow into your home's piping system and contaminate your drinking water.

How to Prevent Backflow?

Keep hoses clear of contaminants by never submerging a hose into a bucket, pool, pond or tub and never use a hose to clear a drain or sewage line. Install a hose-bibb vacuum breaker on all spigots. If needed, install a testable backflow assembly device. The type of backflow device needed will depend upon the degree of hazard.