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lone_psychonaut
Pawn



Registered: 09/27/12
Posts: 95
Loc: Somewhere in the depths o...
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2 holes?
#23369986 - 06/22/16 01:32 PM (7 years, 8 months ago) |
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I have been looking into using self healing ports for my quart grain jars with synthetic filter discs. I've read a lot of people having the injection port and one hole for gas exchange. However isn't it true that there should be two holes; one for air going in and one for air going out?
-------------------- Feed your head...
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Inocuole
Scalpel of Evil's Bane



Registered: 11/21/11
Posts: 24,863
Loc: ★
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Quote:
lone_psychonaut said: I have been looking into using self healing ports for my quart grain jars with synthetic filter discs. I've read a lot of people having the injection port and one hole for gas exchange. However isn't it true that there should be two holes; one for air going in and one for air going out?
Why couldn't one hole facilitate the in and the out exactly? Filter discs work in both directions.. It's not like there's tubes going in the holes with a one way air flow.
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lone_psychonaut
Pawn



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Posts: 95
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I was told that the gas can't go in and out the hole at the same time by a buddy of mine, but I didn't find any supporting claims within the forums
-------------------- Feed your head...
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Bunji Fungi
Enthusiast



Registered: 04/12/16
Posts: 457
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yeah your buddy doesn't know what he's talkin about, but I say two holes are better than one!
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Inocuole
Scalpel of Evil's Bane



Registered: 11/21/11
Posts: 24,863
Loc: ★
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Take this buddy of yours, tie him to your bumper, and take a sunday drive until you don't hear anymore screaming.
The hole is by and large there to prevent a vacuum forming. Air will never need to go in and out at the same time. It either forms a vacuum and pulls air in slowly, or produces a positive pressure and leaks out some air through the filter. Physically, you can't have air going in and out of the same very small container without perfectly balancing the two to prevent a positive or negative pressure.
Seems like a very complicated view of simple physics.
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lone_psychonaut
Pawn



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Posts: 95
Loc: Somewhere in the depths o...
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lol thanks guys, that makes sense. I'll stick with the one hole. Also what's your guys take on the size of injector ports? I've seen some 13mm and others 20mm. Is one size better than the other?
-------------------- Feed your head...
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Inocuole
Scalpel of Evil's Bane



Registered: 11/21/11
Posts: 24,863
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I don't use injector ports since I feel they're a contam vector but when I did I always just did a 1/4 inch hole covered with a dab of silicone.
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lone_psychonaut
Pawn



Registered: 09/27/12
Posts: 95
Loc: Somewhere in the depths o...
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I will research the silicone method, especially if that's less likely to contaminate
-------------------- Feed your head...
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spacechildo
proletarians rise up


Registered: 01/24/13
Posts: 19,243
Loc: Babylon
Last seen: 6 years, 5 months
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Quote:
Inocuole said: I feel they're a contam vector
Quote:
lone_psychonaut said: especially if that's less likely to contaminate

just skip SHIPs all together, crack open the lid in a SAB, much more reliable and the only way you can drop agar wedges in.
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Bobabouy
Shrimp Boat Captain



Registered: 01/19/16
Posts: 661
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Last seen: 6 years, 1 month
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lone_psychonaut
Pawn



Registered: 09/27/12
Posts: 95
Loc: Somewhere in the depths o...
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Thanks for the link, any reason you chose the blue one?
-------------------- Feed your head...
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Bobabouy
Shrimp Boat Captain



Registered: 01/19/16
Posts: 661
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I like the color.
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lone_psychonaut
Pawn



Registered: 09/27/12
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Loc: Somewhere in the depths o...
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Good reason...lol
-------------------- Feed your head...
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lone_psychonaut
Pawn



Registered: 09/27/12
Posts: 95
Loc: Somewhere in the depths o...
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I noticed there are plastic lids with a gas exchange hole and injection port already assembled; I may go that route...
-------------------- Feed your head...
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Inocuole
Scalpel of Evil's Bane



Registered: 11/21/11
Posts: 24,863
Loc: ★
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If you're cool with the markup for labor then I guess it's just as well.
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lone_psychonaut
Pawn



Registered: 09/27/12
Posts: 95
Loc: Somewhere in the depths o...
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How do you mean?
-------------------- Feed your head...
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mupetmower
Mower of Muppets



Registered: 03/29/16
Posts: 3,036
Loc: Here and There
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they are gonna charge you a lot of extra money just for drilling a hole.
-------------------- -The wise man never stops seeking knowledge.
-I wanna feel the change consume me, feel the outside turning in. I wanna feel the metamorphosis and cleansing I've endured within.
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Kenetic
Nam Sayin



Registered: 08/24/14
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Quote:
Bunji Fungi said: yeah your buddy doesn't know what he's talkin about, but I say two holes are better than one! [/quote. ] Two holes might dry it out, ha no pun intended
-------------------- Todo Cambia    DMT said: Everyone know's me, they just don't know it yet
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Kenetic
Nam Sayin



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Re: 2 holes? [Re: Kenetic] 1
#23370509 - 06/22/16 04:54 PM (7 years, 8 months ago) |
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Oops I screwed up the code again
-------------------- Todo Cambia    DMT said: Everyone know's me, they just don't know it yet
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Inocuole
Scalpel of Evil's Bane



Registered: 11/21/11
Posts: 24,863
Loc: ★
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Re: 2 holes? [Re: Kenetic]
#23370641 - 06/22/16 05:39 PM (7 years, 8 months ago) |
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Lol, period and a space.
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