Two ClimateMaster 2 stage systems – 3 ton packaged with VFlow and a 2 ton split with external fixed pump flow center both in parallel to loop field (two 300’ wells, closed loop, 4 ton house per Man j) Systems ran fine for 3 years. Nominal ground temp here 62F, EWT varies between 45F and 78F winter/summer. All good. Two weeks ago 3 ton unit shut down. Small water leak in the ball valve between the PE pipe and the hoses entering the unit. Climatemaster Elite dealer that installed system out of business. Called another CM dealer in the area. Agreed to next available service call 5 days later. Sent pics of the dripping 1 “ water ball valve since they didn’t do the install. Installers showed up, on time, and replaced the ball valve and hooked up a flush cart. After flushing they noted the adjacent check valve was now leaking. No check valve on the truck, came back two days later, replaced check valve, flushed system again. Technician changed the VFlow from 10F delta T to fixed flow based on previous experience with other systems. Also installed water valves with thread sealant. Since then I’ve read the CM IOM. They recommend the 10F delta T for Vflow and Teflon tape on the valves to prevent heat exchanger contamination. The invoice was almost $700. Essentially $250 for the brass valves, $175 times two for the flushes and $90 diagnostic fee. To be honest, I almost fainted. I have a call in to the owner to discuss the bill and the differences from the CM IOM. I’d be grateful for any feedback regarding the bill and the changes the tech made. I really feel like a fool. I was sorta expecting $300 to $400 which would seem to cover replacing a couple of $10 valves and a flush. Thank you.