Tech arrived and was shown to kitchen sink by customer. Customer had explained that the sink started to back up so he tried to use Drano to clear it, however was unsuccessful. Tech explained options and procedure to customer. Customer authorized snaking of drain. Tech attempted to snake drain from underneath kitchen sink however was unsuccessful. Tech attempted to Hydro jet line however was also unsuccessful. Tech went into the basement and via Sani tea Snaked line making multiple passes until line was eventually clear. Upon testing of the line tech made customer aware of an obsolete uncapped tee for a filtration system, as well as the brass dish tee being loose. Customer authorized repair. Tech replaced piping, installing a new dish tee and deleting the no longer needed uncapped tee. At this time the drain is Working properly and no leaks are present. Tech recommended customer use a natural enzyme to help eat any residual grease off of the pipe.