Slayer.. thanks much for the input and suggestions. I’m following along with the concept you presented of pressure drop right as the water enters the pump due to the reducer.

Keeping it simple... you are suggesting the line leaving the mixing valve to the pump go from 2 1/2 to 3 immediately after leaving the valve, and only reduce to 2 1/2 at the last minute where it enters the boiler, yes..?

That keeps as much 3” in the loop as possible allowing the water to settle..

In essence.. that deals with the cavitation before the pump, so we aren’t dealing with the effects of it after the pump...?


She never made it past the bedroom door, what was she aiming for...?
She's gone shootin..