what i was thinking of was a simple battery powered pump sat 12v dc to drive the liquids through a filtre, as you said the hard part is going to come up with a cheap and relyable source of filter pads /system
what i was going to look at was a filtre stocking i had brought from ebay its a 5 micron material filtre sock for use with bio fuels , any way since 5 micron is perfect for yeast removel it seams if i was to find a form of housing for it then a whole sock cut up would make loads of washable filtres to reuse if i needed to,
i have a foot long piece of copper 28mm pipe and two end caps, the first suggestion was to just stuff the copper tube with the soak and see the next idea was to make an inside tube that the sock wraps around and the wine filtres through it, i will have a play at work next week to see, as for pressure wise, i doubht if ant real force is going to be needed