There are many competent plumbers in Tucson, but the mark of a very good one is what happens when an accidental mistake occurs. Don replaced our kitchen faucet and a dishwasher hose because it hadn't been replaced when the new machine was installed two years before, and replaced a shower cartridge/faucet apparatus,
The jobs were well done and we were pleased. Or, we were pleased until we used the dishwasher. Our almost-new machine, that had operated perfectly the night before Don came to work, suddenly would not drain. When we called Don, he did not think he'd caused any problem but said he would be happy to look at it--even though he said he knew nothing about dishwashers. He warned us that if he had not caused the problem, he would have to charge us for a service call.
Worried that we might have to pay for Don's trip (when he probably would not be able to identify the problem) AND another trip by a dishwasher expert, we made an appointment with a repairman from Christies. That technician found that, when Don installed the hose, a wire had been accidentally knocked off its pump position. He moved it back in place and the dishwasher worked perfectly.
The charge was $65 for the service visit and $30 to reposition the wire (a ridiculously high fee, but that seems to be standard practice). When we told Don we knew accidents occured and asked him to at least share half the cost with us since he was indeed the one who had caused the problem, he said he would do even better by giving us an hour's free labor.