Customer stated that they were having a high water bill for a little while now, and also that toilet in master bath was running. Shut toilet off that was running and spotted meter. Didn’t notice meter moving. Also tested water pressure to home. Found that thermal expansion tank has also failed. Gave customer quote to rebuild one toilet and replaced thermal expansion tank. Went ahead and furnished installed new thermal expansion tank with bracket and installed it. Tested and no leaks were pressed at this time. Rebuilt toilet by replacing fill valve flapper and supply line. Tested and no leaks were present this time. Also checked out other toilets and didn’t notice them running. Cleaned up work area.