Hi While fitting a new kitchen recently the customer asked me to take a look at a leak in their utility area. It looked to be a loose connection on the cold tap which I tightened. Fast forward two weeks and the customer calls as the sink has had a major leak and has flooded the cellar while they were at work. My colleague pops round to help and finds that the washer had failed. The guy feels I am somehow responsible but IMO the original work was shoddy. I only looked as a favour and thought I had resolved the issue. Does the guy have an right to be holding me partly responsible?