I recently repaired a hot water line and now part of the house is running real slow. I live in a ranch style with the water lines running in the slab. They are copper. I did some repair work where the sink hot water line comes out of the slab during some remodling (replaced an elbow). The water ran fine before the repair. After the repair I have the lines to the sink (Both hot and cold), the toliet connection, and both hot and cold to the kitchen sink running real slow. All the other lines have normal pressure including the shower in the same bathroom and the laundry room. I checked the meter and it does not show any leaks. I only worked on the hot water line so I do not understand both the cold and hot running slow in only part of the house. We are on city water. Any ideas are appreciated. Thanks.