Glenn Ashmore wrote in message news:fpszb.77476 A 5/8" garden hose will deliver about 10 GPM at a pressure drop of 6 PSI
so with the engine pump pulling and the water system pushing you should
be pretty safe.

Now you're talking. That makes me less leary of the Perko inline flush
kits.
If only they weren't plastic with a spring......
Had a friend lose one of these between West End and West Palm as it
split in half, but that's another soggy story.