Also, the 2.5 mixing valve is acting as a choke in the piping, and is actually restricting the 3.0 pump's volume capacity. I don't know if your boiler's required volume is being restricted here or whether it is being compromised here, but the 3.0 mix valve will eliminate that now.
Your evidence to present to them is two points:
1 - reducer causes cavitation 2 - 2.5 mixer becomes a inline "choke" to the 3.0 B&G pump
Two points to prove their design was flawed, and that's all you have to tell them.
Their next move will determine what action your company needs to pursue if they don't get right.
I'd shoot for 100% coverage for all costs for all time, even the other trips to repair the pumps, all of it. And bill them at your going rate. Don't let them dictate what "they" want to pay. Otherwise you're just simply working at your actual cost, and not making any profit. They are responsible for lost opportunity, so you need to charge your company's normal hourly amount.
"He is far from Stupid"
”person, who happens to have an above-average level of intelligence”
