is it possible to add hop oil or gelatin through the gas post.

[fluketamer]

my beer is under pressure in the keg. how do i add something with a syrigne without degassing.

is there a way to put something inline in the gas in post with higher pressure behind it to add liquids without opening the keg? sort of force it in above the keg pressure?


and without introducing o2

thanks

 

[mac_1103]

I always pull the PRV before I add anything to a keg with a syringe. I think that if you just hook up to the gas post of a pressurized keg it's going to push back harder than you can push in and possibly blow the piston out of the barrel of the syringe, but I'm not really sure since I've never tried. How about using a soda bottle/carbonation tee setup and pushing it in with CO2? If it's a small volume that you're adding, you could pull beer into it through the liquid post and then push it all back in (can switch to the gas post if there's trub in there that you don't want to stir up).

 

[Bobby_M]

 

[brewbama]

As long as the vessel containing the addition is higher psi than the keg psi you can. A PET bottle can hold a surprisingly high psi but I prefer using lower pressures which starts with reducing the keg psi.

 

[Broothru]

I’ve tried various methods many times and finally settled on the PET bottle method. It’s quick, easy, clean, and I’ve never had a blowout while using it.

I put whatever I’m ‘injecting’ into the PET bottle (generally a brown PET 12 oz beer bottle), attach a carbonation cap, pressurize to about 10-12 psi, and connect a jumper line with GAS IN gray fittings on both ends.

When I attach the jumper line to the GAS IN post of the keg (be sure to have the bottle inverted before connecting), the fluid in the bottle flows immediately into the keg in less than a few seconds. No muss, no fuss.

As a follow up, I rinse the bottle with fresh water and a spritz of Star San, let the sanitizer and rinse water drain, and then put a few ounces of sterile water in the bottle. Reconnect the carb cap, pressurize, reconnect the jumper line to the bottle, invert the bottle, and connect the jumper to the GAS IN post of the keg.

The rinse clears any remaining fluid that was being injected from GAS IN post. If you’ve ever mistakenly connected the wrong connector (beer out) to the wrong post (gas in), and experienced sticky beer residue in your gas post that resulted in loosing pressure in your keg, you’ll appreciate this final step.

As I said, this is the only method I use anymore, and it’s nearly foolproof, with me playing the leading role of “fool.” I’ve used the plastic syringe with Lure Lock connectors and nearly always had issues, some much messier than others. This PET bottle method is about as safe and secure as any I’ve tried.

 

[Gajol]

I use a 0.5l soda bottle with a carp cab and a pice of tube

Put my liquid in it and high pressure on it,more then in the keg

Hook it up and watch it get pushed in to the keg

 

[DuncB]

I use a 60ml luer lock syringe fill with the finings, primings etc.
My liquid ball lock is connected to the syringe with a short length of silicone tubing. Screwing the tube into the luer lock.
Then sanitiser the liquid post and inject, draw back beer re inject several times.
I do this around 15psi and no problems in many uses of this method.
I do have a special closed injector which works well but seems extra faff.
https://www.ubrew4u.co.nz/product/UBREW4U-Hop-Flavour-Injector

 

[UdonPete]

Personally I use the smallest (7.5US ounce/220ml) Coke bottle as less head space - and don't forget a quick CO2 purge before connecting