A couple of things - if you have a hose, the filter I have (Stealth) hooks up right to it, without having to do any real "permanent" changes to water lines - just screw it on the hose and you're basically done.
Also, why do you flood for 30 minutes? I'm new to this whole E&F game, but I thought you wanted to flood for as short as possible that got the job done, no? Does it take your pump 30 minutes to flood the tray?
Thanks for your time.
EDIT: just thought, even if you don't have access to a hose, you can just buy a threaded adapter at Home Depot which will turn your kitchen faucet into the equivalent of a hose so that you can screw the R/O filter connection onto it.