Turbocruiser,
I wouldn't be to worried about the water pressure. You can regulate how much and how fast it goes in at the faucet. Beside with the bottom radiator plug out and the cap off (while your flushing the system), there's not going to be much pressure build-up.
:beer:
R2
C'dan, FWIW - One thing I recall from a history class is that mixing water with antifreeze actually lowers the freezing point (i.e. pure antifreeze freezes at a higher temp, don't remember what temp. that is). Back to the history class, in WWII a bunch of the radiators were filled with pure...