Service for dripping shower valve. Arrived to the home to find that the moen single handle shower valve down stairs that has not been used in about a month has a wet spot below the shower head where it drips slightly. Since the shower has not been turned on in over a month, this indicates that the shower cartridge is not shutting off 100%. Recommend trying a rebuild of the moen shower valve because it is only a few years old and has been barely used. The rest of the shower is in great condition. Rebuilt the moen single handle shower valve with new cartridge and gaskets. After the shower was rebuilt, it was tested and now working great. As a courtesy we changed the sediment filter that the customer already had on site. Cleaned the work area, collected signatures and payment. Job is now complete.