First, narrow it down
Only if the tank area is safe and there is no CO₂ room-monitor alarm: read the labeled 0–400 psi internal-tank gauge and the 0–200 psi outgoing-gas gauge. Take a photo without touching the valves.
What you're seeing
| Symptom | Possible cause | What to do next |
|---|---|---|
| Internal gauge below 70 psi on referenced setup | May be empty or dry-iced | Call tank supplier/service. |
| Internal over 70; bottom frost; busy | May be normal high demand | Check if output remains normal. |
| Internal over 70; frost; not busy | Possible ongoing gas draw/leak | Call for safe downstream leak inspection. |
| Internal normal; outlet abnormal | Regulator/delivery problem | Record both gauges; service. |
What to check
Write down the two readings separately
Carbonator’s bulk-tank flowchart describes the 0–400 psi gauge as internal pressure and the 0–200 psi gauge as pressure going to the soda or beer system. That particular field guide expects outgoing pressure near 90–120 psi. Use the actual range approved for your installation.
If the internal reading is below the guide’s 70 psi screening point
On that specific setup, the sheet flags an empty or dry-iced tank as a possible cause and calls for service. Do not attempt to warm, vent, or adjust the tank yourself.
If internal pressure is above that screening point, check visible frost
The field chart next asks whether there is frost around the bottom of the tank. Bottom frost during a busy period can be normal when CO₂ use is heavy. It does not necessarily mean an empty tank.
Frost present but business is not busy?
The original field chart suggests a downstream leak or ongoing demand. From safe, ventilated public access, note whether a syrup pump is cycling continuously, an unused gas-fed keg is disconnected, or a normal supply indicator has changed.
No bottom frost and internal pressure appears normal?
The tank may still have CO₂. Ask whether the issue is flat soda, no syrup, or draft problems, then follow the appropriate equipment troubleshooting path. Do not order a refill solely because a pour is wrong.
If outlet pressure looks low despite adequate internal pressure
The output regulator, vaporizer, or delivery path may need attention. Record the exact readings and call the supplier or Carbonator instead of increasing the setting.
Know when this is no longer a troubleshooting call
If a CO₂ room alarm sounds, anyone feels unwell, or a leak is suspected in an enclosed area, evacuate and call emergency responders before any equipment check.
Why it happens
Internal vessel pressure tells you about tank conditions, not a precise remaining-volume percentage. Frost on a bulk tank depends on demand, insulation, and ambient conditions.
Need service?
For your specific bulk installation, Carbonator can interpret the two readings and arrange delivery, leak checks, or regulator service. Never enter an alarmed or unventilated space to collect readings.
Contact us (215) 726-8000