Flush tankless water heater to remove calcium build up along with any other build up that would cause problems with water heater in the future. Flushed Navien tankless water heater. Looked at bathroom faucets that drip and hall bath faucet really loose and needs tightened. Also at the barn looked for a leak coming from ceiling and determined the tub overflow is leaking only when tub is too full. Instead of going down overflow drain seal is worn out and new waste and overflow should be installed