Patrick Ring, 45, and Dianna Rodriguez, 41, were arrested Feb. 6 after allegedly being caught stealing the valves by police, the San Antonio Express-News reported.
The couple later allegedly confessed to entering a McDonald's restaurant on Dec.11 to steal flush valves from the bathrooms, their arrest warrant affidavits state. They allegedly said they had done the same at five other McDonald's locations.
They then sold the stolen flush valves, which contain brass, a valuable metal, to a recycling company, police say.
Ring and Rodriguez have only been charged in connection with two thefts. They are currently behind bars at a state jail on felony counts of theft of aluminum/bronze/copper and other unrelated charges.