[Simon Carter]

I need some back up for my Omnipole RO & am about to start using again an RO Man 300. I stopped using it simply because the Omipole kit was doing the job on it's own. My question is will the membranes & filters be ok, or will they all need changing,as they have been allowed to dry out.

[Pj]

You may be lucky, but I doubt it, the membrane certainly won't work efficiently.  Only way is to try.