PHOENIX – Just a case of plumb luck.

It took a plumber to retrieve a woman’s 7-carat diamond ring after city workers failed in efforts to flush the gem out of the pipes of a restaurant toilet.

The $70,000 wedding ring fell from Allison Berry’s hand when she flushed the toilet in the restroom of the Black Bear Diner on Jan. 14.

City workers opened a pipe outside the restaurant and continuously flushed the toilet, hoping to push the ring out to the opening. When that didn’t work, the city called the office in suburban Tempe of Mr. Rooter.

Mike Roberts, general manager of Mr. Rooter, guided a tiny video camera into the pipe with an infrared light attached. He eventually spotted the ring just 3 feet down and 5 feet over from where it was flushed.

Then it took an hour-and-a-half of jackhammering and pipe removal before Roberts and a technician could recover the ring.

The Mr. Rooter bill came to $5,200; the city’s bill was $1,000.