Whatman... .20 or .45 ?

[the562goodguy]

i just made a batch for personal use. i first filtered it through the .45 and got an infection on my shoulder. then reheated it and re filtered it through a .45 again. same thing happened. so i filtered through a .22 and hit it yesterday. so far no redness just sore cuz its prop. but we'll see how that comes along. it was really a drag filtering thru the .22 and after filtering like 40ml its started leaking all over the place. i was looking into those stericup filtering units. has anyone ever tried these or anything other than the syringe filters?

 

[pip88]

i just made a batch for personal use. i first filtered it through the .45 and got an infection on my shoulder. then reheated it and re filtered it through a .45 again. same thing happened. so i filtered through a .22 and hit it yesterday. so far no redness just sore cuz its prop. but we'll see how that comes along. it was really a drag filtering thru the .22 and after filtering like 40ml its started leaking all over the place. i was looking into those stericup filtering units. has anyone ever tried these or anything other than the syringe filters?

yea i have the vacuum filters just make sure the oil is warm or it will take all day.

 

[anal itch]

I can't believe this thread is still alive after all this time! For an FYI, I've been using a .45 exclusively for the past several years and have not had any issues with sterility. Then again I'm super anal about the whole process so everything is very clean from start to finish.

 

[Brook2]

I agree with this and have heard the same thing. BUT I would like to know what home brewers are actually using.

As a side note, every Fina kit I've seen comes with a .45 Whatman. Never a .20

I just got done making 100ml home brew EQ at 500mg/ml and started with a .20 Whatman. It took over an hour to filter 30ml then I finally gave up and switched to a .45. I finished the rest of the batch in 20 minutes. Isn't the BA supposed to be your sterilization mechanism?

I use a 0.22 -

AFAIK while the BA kills any bacteria/microbes, etc. - the 0.22 micron is needed to filter them out, with some microscopic particles able to pass through a 0.45.

The kits come with the 0.45 for the reason that the 0.22 will clog much much faster due to the binders and crap in the oil to be filtered.
It would be prudent - not always necessary however - to then run it through a 0.22.

As for time taken, i can get 100ml in 30-45mins using hands and a 0.22 filter.
If it were just myself using it then i may use a 0.45, if others do too i believe one needs to be stringent with sterility.

JMO

 

[joe d]

.45

 

[25homes]

Basically .45 for oil is just fine and is perfectly sterile. .20 is for water based gear. I have been homebrewing for 4 yrs and never used anything but .45 for oils and .20 for waters. Also if you buy sterile filtered oil in bulk this cuts time by way more then half. Then all you have to filter is the powder you heat then run like 5cc of the sterile filtered oil back through the filter at the end to flush any gear left in the filter

 

[Finsfan54]

I've been using the 20 to filter 2 carts. It's a killer on the fingers and forearms and I run it through 3 times after heating it in a hot water bath. I normally go through 2 filters. It takes about 3 hours to filter 40 ml. BUT comma I've never had a painful shot except for the usual nicking a vein or taking a rookie hesitant hit.

 

[25homes]

.20 water based .45 OIL BASED its that simple ba is to sterilize the gear ....45 is more than good to catch anything in an oil. been homebrewing like this for yrs now never have had an abcess or infection nothing like this

 

[SlimJim300]

I've always used .45 and had no problems.

 

[bigtravis]

i use a 0.22 -

afaik while the ba kills any bacteria/microbes, etc. - the 0.22 micron is needed to filter them out, with some microscopic particles able to pass through a 0.45.

The kits come with the 0.45 for the reason that the 0.22 will clog much much faster due to the binders and crap in the oil to be filtered.
It would be prudent - not always necessary however - to then run it through a 0.22.

As for time taken, i can get 100ml in 30-45mins using hands and a 0.22 filter.
If it were just myself using it then i may use a 0.45, if others do too i believe one needs to be stringent with sterility.

Jmo

+1