Re: non-washable hoses.
Like others have already siad. Get a Nammour hose! It'll be the last hose purchase you ever need to make. Every other non-washable hose out there is just a ticking time bomb to rust. Eventually the inevitable will happen, even if you don't run water through it. I have a "top of the line" Mya Cloissonne hose that rusted without ever coming in conatct with water. Miami's humidity got to work pretty fast and rusted it only a couple of months into ownership.
Then again, I did store that hose inside my car 24/7, so that probaby wasn't such a good idea. But now that I have a Nammour, I can leave it in my car 24/7 and not have to worry...