Hi Jobe,
Note: Feeling kind of long winded....
You are probally hit the nail on the head about using the filter for only one batch.Right now I too green to know any better and like any kid with a new toy... I just want to play.
The filter issue was one that I had a tough time addressing.(Time for any filter gurus to chime in and help out)
Like so many beginners, I readmany posts on the pros and cons of filtration. In addition, I enlisted vendors at work to do some sidelineresearch and contacted and visited a couple winery's. The whole thing got out of hand for me and beforeI knew it I ended up with a pile of useless data (my eighth grade math only goes so far) and filter samplesthat were way out of my price range.
Looking back, I was drawn to this link for whatever reason:
http://www.weekendbrewer.com/winefilter01.htm
I contacted weekendbrewer and discussed the shop vintage filter with a couple weekend wine warriors.(Relative uses version of shop vintage filter) It was then remembered a visit to local redemption center. Pile of Cornelius kegs which were offered for 2 bucks ea. Should have bought, would have mad a mint on ebay.(They are no longer there)
This memory drew me to this link for what ever reason:
http://www.midwestsupplies.com/products/ProdByID.aspx?ProdID=4582
I contacted Midwest and spoke for a while with one of their 'brew masters'. His response: "Dude... you are doing it the hard way. Man... just buy yourself a mini jet and be done with it."
So I did it the hard way....
If my memory serves me correct, the mini jet #1 was 6 micon nominal, #2 1 micron nominal, and #3 were .05 micron nominal. I originally did a quick search and foundno posted data on the filtration curve of Buon Vino's supplied pads.(Should have contacted Buon Vino) Comparing 10" cartridges to above: 5 micronnominal and 1 micron nominal fell within same price range per filtration. Purtrex (GE) seamed to be the vendor choice for economical cartridges. Without anyBuon Vino data, I opted to compare apples too apples. A problem arose when matching a .05 micron nominal 10" cartridge. Midwest sales .05 nominal for I believe 2.95 ea. I ordered a couple so I couple so I could research actual part #. Filters arrived sealed in after market package, with no make, model, etc. I contacted Midwest and hit a brick wall. hmmm... Other .05 nominal 10" options were not cost efficient compared to mini jet. Off to the web and landed on E-bay.
Web photos showPURTREX PX05 (5 micron nominal $2/ea) and Pall HDC II PFY1J006J (.06 absolute E-bay $3/ea) cartridge.With a flow rate of less than a gallon a minute Pall filter curveplaces it about .045 @ 99%. Comparable absoluterun about $30/ea andnominal$10/ea. Anysuggestions or sources here would be greatly appreciated.
I also had my doubts about how it would handle last half gallon or so. But to my surprise, it left very little behind due to the design of the corny keg. After draining filter housings and corny keg... about 8 oz.and somehold out in cartridges themselves. (I will squeeze it out good next time andrecord amount) Also had to slow down and invert filter canisters, for last2 1/2bottles. Failure to do so allowed nitrogen to overcome the wine. Couple of occasional burps in last two bottles. In short, be prepared to drink a bottle. Probally another good reason to limit its use to multiple batches.
My concerns is preflush of filters. Pall rep told me flushing was not needed if cartridge was still sealed. What do you all do? Do these type of filters leave catridge floatys?
As far ascart for filter (given a person has space), try mom and pop salvage yard. Don't know your location, but down here they are a dime a dozen.
Dean