Author Topic: Suck back solutions  (Read 2664 times)

Offline BrewBama

  • Senior Brewmaster
  • ******
  • Posts: 1414
    • View Profile
Suck back solutions
« on: September 30, 2017, 09:05:12 PM »
I saw a company market this and decided I can do this and save about $45

Theirs for ~$50:



Mine for ~$5 (granted I had the tubing, jars, air lock, and o-rings on hand)



I think I'll install an 'S' air lock but here ya go after 5 min of drilling and assembly:




Sent from my iPhone using Tapatalk
« Last Edit: September 30, 2017, 09:24:55 PM by BrewBama »
Huntsville AL

Offline Stevie

  • Official Poobah of No Life.
  • *
  • Posts: 6858
    • View Profile
Re: Suck back solutions
« Reply #1 on: September 30, 2017, 09:45:40 PM »
Cool. Consider switching to grommets. It would allow you to put the soft tubing directly into the lids and would minimize parts.

Offline tommymorris

  • Senior Brewmaster
  • ******
  • Posts: 1954
  • Tommy M.
    • View Profile
Re: Suck back solutions
« Reply #2 on: September 30, 2017, 09:45:41 PM »
I may not understand the contraption, but, why is the extra airlock even needed?  The tubing sits in water in the jar. That's an airlock right there.

Offline Wilbur

  • Brewer
  • ****
  • Posts: 346
    • View Profile
Re: Suck back solutions
« Reply #3 on: September 30, 2017, 09:54:59 PM »
I may not understand the contraption, but, why is the extra airlock even needed?  The tubing sits in water in the jar. That's an airlock right there.
It's kind of a triple airlock/blowoff deal so when you cold crash you don't suck oxygen in your fermenter. Looks great, I think even if you bought done silicone tubing and the jars you'd be about $8 in.

Offline BrewBama

  • Senior Brewmaster
  • ******
  • Posts: 1414
    • View Profile
Suck back solutions
« Reply #4 on: September 30, 2017, 10:05:33 PM »
Cool. Consider switching to grommets. It would allow you to put the soft tubing directly into the lids and would minimize parts.

True. But then I'd have to buy a bigger drill bit than I have on hand.

I may not understand the contraption, but, why is the extra airlock even needed?  The tubing sits in water in the jar. That's an airlock right there.
It's kind of a triple airlock/blowoff deal so when you cold crash you don't suck oxygen in your fermenter. Looks great, I think even if you bought done silicone tubing and the jars you'd be about $8 in.

+1. It saves the CO2 from fermentation and when you cold crash it sucks CO2 back instead of O2 and liquid.

I'm gonna use the $45 to order my next batch's ingredients.

Sent from my iPad using Tapatalk
« Last Edit: October 01, 2017, 11:57:03 AM by BrewBama »
Huntsville AL

Offline brewinhard

  • Official Poobah of No Life.
  • *
  • Posts: 3217
    • View Profile
Re: Suck back solutions
« Reply #5 on: September 30, 2017, 10:17:17 PM »
Nice work and pretty cool too!

Offline TeeDubb

  • Cellarman
  • **
  • Posts: 49
  • TeeDubb
    • View Profile
Re: Suck back solutions
« Reply #6 on: October 01, 2017, 03:04:22 PM »
I like the idea, but it seems complicated.  What I started doing on recent batches is just snip the corner off a large gallon size ziplock bag and then put the entire airlock inside the bag.  I zip-tie the snipped corner around the airlock tube just above the fermenter grommet. While I could let the bag fill up with co2 from fermentation, I just purge and fill it from my c02 tank and seal it up prior to cold crashing. I have not seen more then about half the bag volume of C02 gas get pulled into the fermenter going from 70 to 35F.

Offline JT

  • Senior Brewmaster
  • ******
  • Posts: 1303
  • Bloatarian Brewing League - Cincinnati, OH
    • View Profile
    • Bloatarian Brewing League
Re: Suck back solutions
« Reply #7 on: October 02, 2017, 03:09:16 AM »
I like the idea, but it seems complicated.  What I started doing on recent batches is just snip the corner off a large gallon size ziplock bag and then put the entire airlock inside the bag.  I zip-tie the snipped corner around the airlock tube just above the fermenter grommet. While I could let the bag fill up with co2 from fermentation, I just purge and fill it from my c02 tank and seal it up prior to cold crashing. I have not seen more then about half the bag volume of C02 gas get pulled into the fermenter going from 70 to 35F.
Sorcery! I like it!

  "If more of us valued food and cheer and song above hoarded gold, it would be a merrier world."


Offline jeremy0209

  • Cellarman
  • **
  • Posts: 34
    • View Profile
    • Brewing with Jeremy
Re: Suck back solutions
« Reply #8 on: October 02, 2017, 07:30:38 PM »
I've never been able to successfully (cleanly) drill a hole in a Mason jar lid. What kind of drill bit did you use?

Offline BrewBama

  • Senior Brewmaster
  • ******
  • Posts: 1414
    • View Profile
Suck back solutions
« Reply #9 on: October 02, 2017, 11:55:06 PM »
I like the idea, but it seems complicated.  What I started doing on recent batches is just snip the corner off a large gallon size ziplock bag and then put the entire airlock inside the bag.  I zip-tie the snipped corner around the airlock tube just above the fermenter grommet. While I could let the bag fill up with co2 from fermentation, I just purge and fill it from my c02 tank and seal it up prior to cold crashing. I have not seen more then about half the bag volume of C02 gas get pulled into the fermenter going from 70 to 35F.

Sorcery indeed!  LOL

I've never been able to successfully (cleanly) drill a hole in a Mason jar lid. What kind of drill bit did you use?

I used Dewalt Titanium bits. I did get some tearing but a pair of lineman's pliers cleaned up the holes. The o-rings on each side of the lid -- compressed slightly with nuts -- gave me a good seal.


Sent from my iPad using Tapatalk
« Last Edit: October 02, 2017, 11:59:13 PM by BrewBama »
Huntsville AL