After the plumber made the repair I went to Home Depot and looked for the replacement part he installed. The part was $6 but Dwyer charged me $86 for the part, that's a 1400% mark up. The plumber was going to charge me $96 for the part but I asked if I could get a discount. BTW, the $86 didn't include the service call of $70 I was also charged. What a SCAM!