GLENDORA — Since November, thieves have swiped copper water valves from the exterior of a dozen buildings in the city.

Glendora Police said the thefts typically occurred over the weekend and occasionally during weeknights.

The valves taken are large U-shaped pipes that feed water into the building and measure at least two feet long with attached valves or the water meter, according to police.

Lt. James De Mond said a video showed two people during the Jan. 12 theft in the 500 block of South Pasadena Avenue but the image isn’t clear.

The copper culprits have hit the following locations:

*Nov. 17, 2011 in the 400 block of West Route 66

*Nov. 25, 2011 in the 300 block of West Route 66

*Between Dec. 5 and 5, 2011 in the 1300 block of South Grand Avenue

*Between Dec. 25 and 25, 2011 in the 1300 block of South Grand Avenue

*Between Jan. 6 and 7 in the 300 block of East Route 66

*Between Jan. 8 and 9 in the 500 block of East Route 66

*Between Jan. 6 and 9 in the 900 block of South Grand Avenue

*Between Jan. 12 and 13 in the 800 block of South Grand Avenue

*Jan. 12 in the 500 block of South Pasadena Avenue

*Between Jan. 24 and 25 in the 1300 block of East Route 66

*Jan. 25 in the 600 block of South Elwood Avenue

*Between Feb. 10 and 13 in the 300 block of West Route 66

Anyone with information on the thefts is asked to call Detective Shelly Schaiterer at the Glendora police department, 626-914-8250. Refer to case #12-0281.

– Ruby Gonzales