I found Petterd's in the yellow pages and used them to move some pipes in my kitchen to get a new dishwasher to work. The man was an older gentleman who has obviously been in the business for years. In fact I think he said his father and grandfather have run the business for years as well so it's in the DNA!
He obviously knew what he was doing and filled me with confidence. The instructions in my dishwasher's manual weren't quite clear, but he had experience with other dishwashers of that brand and was able to use that knowledge to resolve my problem relatively quickly.
I would definately use this business again.