PORTLAND — NW Natural (NYSE:NWN) is notifying its customers of an important safety matter: on rare occasions, a sewer backup could mean a natural gas line has accidentally crossed the sewer line.

If a sewer backup occurs, it’s important that plumbers first scope the line with a video camera. Attempting to clear a sewer line without first using a scope could result in the release of natural gas into the sewer system of a home or business, a potential hazard.

If a crossed line is suspected, call NW Natural at 800-882-3377. If the lines cross, the gas line will be rerouted at no cost to customers.

“It’s important to scope prior to clearing a sewer line and also to call us,” Ryan Van Gordon, NW Natural project manager, said in a press release. “These simple steps could prevent a potentially unsafe situation.”

A gas line can accidentally cross a sewer line if the sewer line wasn’t able to be located on a map or didn’t have tracing technology in it at the time the line was installed. This problem is now preventable because maps and tracing technology are improving. Plus, NW Natural now sends a video camera down the sewer line after installing a gas line with trenchless construction.

To learn more: www.nwnatural.com.

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