They have unit pricing. If you only need a leaky valve fixed they charge for a full reinstallation. 2 hrs or 6 all the same price. I get the knowledge thing, but all I needed was a new saddle clamp for the ice maker installed that was leaking. I was quoted for $500.00. I reluctantly paid the $65 service call for a 2 hr job in my mind and I sent them on their way. For the $500 I can afford to take the day off, fix it and still save money.