commercial wb C/W comparison

[BillA]

this was posted on OCers, but apparently not known here
as several have asked



if read vertically, the wbs' "C/W"s can be compared [u]on the basis of pressure drop) - which is what the pump will see

the PolarFLO is not included, but will be along with several others both new and (very well) known

then an overall summary of the testing to date will be posted