Troubleshooting CO2 Issues

Skip to the relevant section:
   Gas Leak Drinks are Flat
     Changing the CO2 cylinder No Syrup dispensing

If you suspect a CO2 Leak


video shows how to check for a leak
This is the easiest, best way to tell if you have a
Carbon Dioxide (CO2) gas leak

Symptoms of a CO2 leak:
  • you may be going through too much CO2
  • you may hear a whistle or hissing sound
  • if you are using syrup pumps, you may hear a repetitive pssht... pssht... pssht sound.
  • you may see frost near the cylinder valve (connection) or regulator

(if your regulator is frosted over, or if your CO2 Alarm has activated - let us know it's an emergency!)

Here is a Breakdown of the Video from above.

To determine if you have a leak:
A.  Make sure everyone quits using the system(s) for a minute
B.  Turn Valve on CO2 tank all the way off (righty-tighty).
            turn off high pressure cylinder with upper handwheel

C.  Watch pressure gauge on regulator.  It should stay at whatever pressure it was at before you turned off the gas.
             Watch for pressure to drop
If the needle drops while the gas is off and no one is using the system, then you have a leak! 

The faster it drops the bigger the leak.

If it drops very slowly over 2+ minutes or more time, then you have to make a decision whether you are going to spend time and money finding that small leak.

A common problem is lack of a sealing washer between the tank valve and the regulator. 
These connections are not air-tight without a washer!
    shows the washer on the neck of the cylinder
Carbonics includes a washer along with every cylinder we deliver so that you can replace the washer each time for maximum effectiveness.  (There must be a washer between the cylinder and the regulator)

This Washer is not going to work!
bad washer
WAY past time
to replace the washer!
bad washer

Another problem might be that you had or have an empty BIB and the pump for that flavor did not shut off right away until someone changed the BIB.

If neither of these conditions apply, then you need a service call to fix the problem!
  Contact Service

If you do not have a leak in the system there are still a few things to check to help stop unusual CO2 useage.

A.  Make sure the employees are changing the CO2 cylinder correctly         
B.  Make sure empty BIB's get changed immediately
C.  Make sure you are not losing product to employees or guests after-hours.

Changing the CO2 Cylinder


video guide to change co2 tank


Here are some written details from the video above:

Close the "empty" tank by turning the handwheel tank valve completely to the right
shutting off the gas cylinder valve
  • Loosen the connection nut using a CO2 wrench or box end wrench ONLY.
  • Each time you change tanks we recommend replacing the sealing washer between the regulator and the tank.
  • Re-connect the regulator to the new cylinder and tighten the large fastening nut securely.
  • Open the new cylinder by turning the handwheel tank valve completely to the left. (watch and listen for escaping gas!)

No Syrup coming out
Could be 1 of 2 problems

1 line is not coming out
(but the others are working)

ALL of the lines are not working
(water only coming out)

1.  If you only have soda water (carbonated water) coming out check that the BIB is still full.
     A. Check if connector may not be fully seated
     B.  If connector is seated, the push pin tab inside the neck of the BIB may have been pushed inwards This plastic ring with a tab inside the neck of the BIB is not as sturdy as we would like.  Sometimes it may get "pushed" into the bag.  If you are VERY careful you can pull it back out!

If you are only getting plain water (not carbonated) out of every valve (or button on a gun) then you can usually fix that on your own.  *Careful: Plain water coming out of a dispenser might look carbonated at first glance because it gets stirred up and this traps bubbles. The best way to know if it's carbonated or not is to dispense some of this water into a cup and look for carbonation there.
activator tab on BIB syrup
This is the "tab" that must push on the connector so
syrup can flow

pull out this ring
You can try CAREFULLY pulling out on this tab, or pushing it out by pressing behind it.  This connector is fragile, and if it breaks you have just lost all the syrup in that bag.

So if you have PLAIN water only (not carbonated) coming out of every valve (or button on a gun) and you have no syrup, then you you're not getting gas to your pumps. Either your CO2 tank is turned off, empty, or you have a shut-off valve that has been shut off!


This is Shut OFF


This is turned ON!

2. The other possibility is that your syrup pump is no longer working or your line is clogged internally. 
Unfortunately repairing either of these issues is more
complicated than most people can handle without specialized tools and experience, so we recommend you contact Service

3. There is also the possibility that your dispensing valve (if this is a dispenser, not a gun) has failed Unfortunately repairing this issue is more complicated than most people can handle without specialized tools and experience, so we recommend you contact Service

Make sure your cylinder is opened up.

Make sure your shut off valve is turned ON.

If you have CARBONATED water coming out, but no
syrup then try this:

1. Run your carbonated water for 1 full minute. Is it still
carbonated? If not, go to the section above that says

2. If you run your water and it's STILL carbonated and
you also DON'T have syrups, then you're just not getting pressure to your pumps. There is a secondary (additional) regulator somewhere -maybe near your pumps- that has been shut-off. If you cannot find it, then just Contact Service

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