Homeowner had noticed a wet spot on the drywall on the main floor stairwell. Cut out section of drywall and located CPVC water lines. There is a slight drip from the CPVC fitting. Shut water off and drained system down. Cut out section of failed CPVC and glued tradition fittings to copper. Ran new 3/4 and 1/2 copper lines. Applied new fire sealant around the 1/2 line. Let glue cure and turned water on. Purged air from the system and tested.