I've sparked a bit of a debate over here as I try to figure out the best way to plumb my 2 tier 3V system.
I understand there are a lot more experts and graduates floating around these forums, so for educational purposes, I'm bringing the discussion here in a hope that it will progress beyond supposition.
Basically what triggered this is that my pump lacked the power to pump through the HX and over to the boil kettle. While this will unlikely continue to be a problem with my new Chugger and underletting, rather than pumping over the top of the boiler, I'm still curious about the design principles.
It was suggested to place the HX coil on the input side of the pump, which would therefore reduce the pumping distance to the boiler. It has been stated that, given that the wort is traveling through the coil by gravity, that the pump is actually doing less work. However, it was counter-stated that despite gravity feed, the flow would be restricted and potentially cause cavitation.
Is anyone able to provide a more digestible conclusion as to whether or not the HX on the inlet side would ACTUALLY be a problem (rather than just potentially)?