On Tue, 15 Feb 2005 03:02:28 GMT, (Roy) vaguely
proposed a theory
.......and in reply I say!:

remove ns from my header address to reply via email


GPM is how much the time it takes to cycle due to flow in an unloaded
operation. More load, GPM is going to drop, and pressure will
increase..

Is this something to do witht eh two-stage pumps? Hydro pumps should
deliver constant flow, at any pressure