No beer coming out of the keg: causes, checks, and solutions - Beer Tips

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Grifo de cerveza sin caudal con barril, cabezal, tubo y regulador de CO₂ para diagnosticar por qué no sale cerveza - Install Beer
Beer Tips · Quick diagnosis of towers and kegs

No beer coming out of the keg: causes, checks and solutions

If no beer comes out of the keg, the most important thing is not to change settings at random. The problem may lie in the head, the CO₂, the regulator, the keg, the check valve, the line, the chiller, the tap, the flow control or even in internal sediment in the beer. In this guide we explain what to check step by step, which checks you can carry out safely and when it’s best to call for technical support.

Wrong coupler Without CO₂ Blocked check valve Frozen line Compensator closed Sediment Cleaning Technical service
Grifo de cerveza con vaso inclinado para diagnosticar por qué no sale cerveza del barril
When no beer comes out, it’s best to troubleshoot in order: keg, coupler, gas, pressure, line, tap and cleaning.

Quick summary

If no beer is coming out of the keg, first check whether there is beer in the keg, whether the CO₂ cylinder is open and charged, whether the regulator has pressure, whether the coupler is the right one and engaged, whether the check valve is blocked, whether the line is kinked, dirty or frozen, and whether the tap compensator is open.

What to check first if the tap is not dispensing beer

Start with simple checks: full keg, gas open, pressure visible on the gauge, coupler properly connected and tap open. Then check check valves, tubing, compensator, cooler and line cleaning. If the system still has no flow or you don’t know where the blockage is, it’s better to stop and request technical support.

A “no beer coming out” issue may seem simple, but it can have different causes: lack of drive, poor connection, mechanical blockage, ice in the line, sediment, blocked valve, closed tap, or an incompatible component.

Guide contents

Correct diagnostic order

When a tower stops dispensing beer, the most common mistake is to start increasing pressure, taking parts apart or fiddling with the cooler without knowing where the fault is. The right approach is to follow a safe order: first confirm that there is product and drive gas; then check the connection; and finally look for blockages, ice, a closed compensator or dirt.

1. Product

Confirm that the keg is not empty and that the valve is not damaged.

2. Gas

Check that there is CO₂ or blend, the cylinder is open, and the regulator is pressurized.

3. Coupler

Check that the head is compatible and properly engaged.

4. Line

Check that the tube is not kinked, pinched, frozen, dirty or blocked.

5. Tap

Check that the compensator is open and that the tap is not blocked.

6. Scaling up

If it isn’t resolved, avoid forcing the system and consult a technician.

Safety before handling

Do not disassemble pressurized components without shutting off the gas and safely depressurizing. If you suspect a frozen line, leak, abnormal pressure, blocked part, or faulty cooling unit, request technical assistance before forcing the system.

1. Check whether the keg is empty or not properly tapped

The first check seems obvious, but it’s one of the most important: confirm that the keg contains beer. At events, bars with several lines or setups with poor visibility, it’s common to mix up kegs, tap an empty keg or not leave the coupler properly engaged.

If the keg is full but no beer comes out, check that the coupler is actually engaged and activated. On many couplers, the lever must be pushed down to open the keg valve. If it is not properly engaged, it may look like everything is connected, but the beer will not flow.

Quick checks
  • Is the keg full?
  • Is it the right keg?
  • Is the valve in good condition?
  • Is the coupler correctly fitted?
  • Is the lever engaged?
Failure signs
  • No flow or foam.
  • The coupler doesn’t go down properly.
  • You can hear a leak when operating it.
  • The keg seems tapped but is not dispensing.
  • The coupler does not fit naturally.

2. Check that the coupler is the right one

The essence of the original article started with this check, and it is still key: not all kegs use the same coupler. Some couplers look very similar, but they are not compatible. If the coupler does not match the keg valve, gas may not enter, beer may not come out, or leaks may occur.

It’s common to confuse D-type and S-type couplers, or G-type and KeyKeg, especially if you don’t work daily with different brands and formats. Before forcing the coupling, confirm the type of valve on the keg.

Cabezal tipo D para barril de cerveza
D-type coupler: can be confused with other systems if the valve is not checked.
Cabezal tipo S para barril de cerveza
Type S coupler: very common in European kegs, but not universal.
Cabezal tipo G para barril de cerveza
G-type coupler: another coupling system for certain kegs.
Cabezal KeyKeg para barril con bolsa interior
KeyKeg coupler: specific for kegs with the KeyKeg system.

Not sure which coupler your keg needs?

Send us a photo of the keg valve and we’ll help you identify whether you need an A, D, G, S, M, L, KeyKeg, Cornelius or another system head.

See keg couplers Read the coupler types guide

3. Check that CO₂ is entering the keg

If the head is correct, the next step is to check the drive. In most beer installations, gas pushes the beer from the keg into the line. If there is no CO₂, if the cylinder is closed, if the regulator is shut or if the pressure is insufficient, the beer will not flow.

The original article recommended lowering the coupler handle as if you were going to tap a keg to check whether CO₂ is coming through. This check must be done carefully and with an understanding of the system: you need to verify the cylinder, main valve, regulator, shut-off valve, gas line and connection to the coupler.

Pomo o mango de cabezal de cerveza para accionar el barril
The coupler handle actuates the connection with the keg. If the coupler is not fully engaged, gas may not enter and beer may not come out.
Gas check What to look at If it’s wrong Indicative solution
CO₂ cylinder Make sure it’s charged and open. There is no dispense. Open a bottle or replace it with a full one.
Regulator That it shows pressure and is not closed. No gas is reaching the coupler. Adjust according to the setup or consult a technician.
Shut-off valve That it is open. The gas is shut off before the keg. Open the corresponding valve.
Gas tube Make sure it isn’t kinked, disconnected, or leaking. The keg isn’t getting any pressure. Check fittings, clamps, and tubing.
Coupler Let the gas flow into the keg. There may be a blocked check valve or a faulty coupler. Check non-return valve, cleaning, and coupler condition.

Pressure is not adjusted “by eye”

There is no single pressure for all beers. It depends on temperature, type of keg, carbonation, distance, line diameter, height and tap. Raising the pressure too much to “force” the flow can cause foam, leaks or overcarbonation.

4. Check the non-return valves on the coupler

Check valves are small components that allow flow in one direction and prevent unwanted returns of gas or liquid. If they become blocked, incorrectly assembled, dirty or damaged, they can prevent beer from flowing out or gas from flowing in.

This was another of the original recommendations in the article, and it is especially important in systems that have gone a long time without maintenance or with frequent keg changes.

Antirretorno de cabezal de cerveza para evitar retorno de líquido o gas
Keg coupler check valve: a small part can block the flow of gas or beer if it’s worn or dirty.
When to suspect the check valve
  • There is gas in the cylinder but it’s not entering the keg.
  • The coupler is correctly connected but there is no flow.
  • The system has been out of use for a long time.
  • There are traces of dried beer or dirt.
  • There have been liquid returns.
What to do
  • Shut off gas before handling.
  • Check orientation and condition.
  • Clean if necessary.
  • Replace if it has hardened or is blocked.
  • Consult a technician if you cannot identify the part.

5. Check line, tubing and obstructions

If the keg, gas, and correct coupler are in place, the problem may be in the beer line. The tube may be kinked, pinched, blocked by dirt, frozen, or affected by product sediment. There may also be a poorly connected fitting, a closed shut-off valve, or a stuck valve.

In systems with long, chilled, or pumped lines, troubleshooting can be more complex. In that case it’s best to check section by section: keg outlet, coupler, initial tube, cooler, final line, column, and tap.

Line area Possible issue Symptom Recommended action
Product tube Kinked, constricted or pinched. Nothing comes out or it pours very slowly. Check the run and replace if damaged.
Fitting or connector Poorly fitted, blocked, or leaking. Lack of flow or loss of pressure. Check the fit, clamp, gasket, and diameter.
Shut-off valve Accidentally closed. Gas or beer is not circulating. Open the correct valve.
Cooler Frozen line, blocked coil, or overloaded equipment. No beer comes out or it only comes out after waiting. Defrost safely and check the thermostat.
Tap Dirt, closed flow control or blocked part. Nothing comes out or very little comes out. Clean, open the compensator or check replacement parts.

6. Check if the cooler has frozen the beer

The original article already pointed to a very important cause: the chiller may have too much ice or have frozen part of the beer line. When beer freezes inside the coil or the line, the system is blocked and no product comes out even if there is gas, pressure and a full keg.

This can happen due to a misadjusted thermostat, equipment running too cold, lack of circulation, long service pauses, a line with little movement or maintenance issues. If you suspect a frozen line, do not force the pressure or dismantle the circuit without proper safety.

Do not force pressure if you suspect the line is frozen

If there is ice blocking the line, increasing pressure is not the solution. It can raise the risk of leaks or damage to connections. The right thing to do is let it stabilize, check the cooling unit and contact technical support if the problem repeats.

7. Check tap and compensator

Something very simple can also happen: the compensator on the tap is closed. On taps with a compensator, a side lever or regulator allows you to partially close the flow. If it has been closed by mistake, the beer may pour very slowly or not at all.

The original article already warned about this point: the flow control may have been closed unintentionally and then forgotten. Before dismantling half the system, check whether the tap is open, whether the flow control allows passage and whether the spout is not blocked.

Grifos de cerveza con compensador señalados para revisar apertura de caudal
On taps with a compensator, a closed setting can reduce or block the flow. It’s worth checking this before changing the pressure.

8. Sediment in lightly filtered beers

In some lightly filtered beers, with yeast in suspension, intense dry hopping, fruit, spices, or sediment, an internal plug can form in the keg, coupler, line, or tap. This doesn’t always happen, but when it does it can partially or completely block the beer flow.

If you have already checked the keg, coupler, CO₂, pressure, check valve, line, cooler, and tap, and the system still has no flow, sediment may be a possible cause. In that case, it’s best not to force it and to consult the beer supplier or technical support.

Special attention with lightly filtered craft beers

Beers with sediment may require more care in transport, resting time, temperature, pressure, and cleaning. Shaking the keg or serving it before it has settled can drag sediment into the line.

Diagnostic table: causes and solutions

Symptom Probable cause Quick check Indicative solution
No beer comes out Empty keg, gas closed, coupler not engaged or line blocked. Check keg, CO₂, regulator and coupler. Open gas, change keg, engage coupler, or check the line.
No pressure on the gauge CO₂ cylinder empty, closed or regulator shut. Check cylinder, main valve and shut‑off valve. Replace cylinder, open valve or check regulator.
There is gas but no beer comes out Wrong keg coupler, blocked check valve or clogged line. Identify the keg coupler and check the check valve. Use the correct coupler, and clean or replace the check valve.
Very little beer is coming out Closed compensator, low pressure, kinked tube or dirt. Check tap, pressure and tube run. Open the flow control, adjust pressure or clean the line.
The system was cold and then stopped pouring Frozen line or coil. Check cooler, thermostat and resting time. Allow to thaw safely and check the equipment.
Foam comes out but no clean flow Incorrect pressure, warm keg, damaged valve or partial blockage. Check temperature, pressure, and coupler. Adjust the system and clean if necessary.
Repeated with every keg change Unsuitable coupler, operator error, or lack of training. Compare valve, head and procedure. Train the team and document the keg change.

Is your system down and you need help?

If you’ve checked the keg, gas, coupler, check valve, line, and tap and there’s still no beer coming out, we can help you diagnose the system, suggest compatible spare parts, or assess technical service.

Contact Install Beer View cleaning and maintenance

What you shouldn’t do if no beer is coming out

When you’re in a hurry, especially in a bar or at an event, it’s easy to make quick decisions that make the problem worse. These are actions you should avoid.

Avoid
  • Cranking the pressure up too high without diagnosis.
  • Forcing a coupler that doesn’t fit.
  • Disassemble pressurized parts.
  • Hitting the keg or the valve.
  • Pinching tubes to “test”.
  • Serving from a line that smells bad.
Do this instead
  • Check in order.
  • Take a photo of the keg and coupler.
  • Check pressure and temperature.
  • Identify whether there is ice or a blockage.
  • Clean if there is any suspicion of dirt.
  • Consult if it isn’t resolved quickly.

What to buy or check depending on the cause

If the problem keeps recurring, it may be a sign that some component is missing, parts are worn, or the system needs maintenance. These are the most common purchases or checks.

Identified cause What you might need Internal link
Incompatible coupler Type A, D, G, S, M, L, KeyKeg or other compatible coupler. Keg couplers
Lack of CO₂ or pressure Gas cylinder, regulator, pressure gauge, gas line or gas fittings. Gas and regulators
Blocked check valve Non-return valve, seals, spare parts or coupler cleaning. Connectors and fittings
Bent or damaged tube New food‑grade tubing with the correct diameter. Dispensing tubes
Compensator closed or dirty tap Tap, spare parts, seals or tap cleaning. Beer taps
Dirty or blocked line Cleaning canister, detergent, adapters and line cleaning. Cleaning and maintenance
Chiller or frozen line Equipment check, cold adjustment, or service call. Dispensers and chillers
Recurring issues Full diagnosis, training and preventive maintenance. Installation and technical service

Final checklist before requesting support

  • Is there beer in the keg?
  • Is the CO₂ cylinder open and charged?
  • Is the regulator showing pressure?
  • Is the gas shut-off valve open?
  • Is the coupler the right one for that keg?
  • Is the coupler properly engaged?
  • Are the check valves clean and unclogged?
  • Is the beer line straight and free of kinks?
  • Could the cooler have frozen the line?
  • Is the tap’s flow control open?
  • Have the line and tap been cleaned recently?
  • Is the beer lightly filtered and likely to have sediment?

Resolve the issue with compatible components

At Install Beer we can help you with couplers, regulators, gas, tubing, fittings, check valves, taps, cleaning and technical service so your system pours beer correctly again.

View couplers Request technical help

Frequently asked questions when no beer comes out of the keg

Why isn’t beer coming out of the keg?

The most common causes are empty keg, closed or empty CO₂ cylinder, closed regulator, incorrect or improperly engaged coupler, blocked check valve, kinked line, frozen line, dirty tap, closed compensator or sediment in the beer.

What is the first thing I should check?

Check that the keg contains beer, that the CO₂ cylinder is open and charged, that the regulator shows pressure, and that the coupler is properly connected and engaged.

Could it be that the coupler is not the right one?

Yes. Some couplers look similar, such as type D and type S, or type G and KeyKeg, but they are not interchangeable. If the coupler does not match the valve, beer may not come out or there may be leaks.

Why is there gas but no beer coming out?

There may be a blocked check valve, an obstructed line, a poorly connected head, a closed flow control, a closed shut-off valve or a plug of sediment.

Can the beer freeze inside the cooler?

Yes. If the system runs too cold or there is excess ice, the line or coil can freeze and block the flow of beer.

Can the tap compensator prevent beer from coming out?

Yes. If the compensator is fully closed or blocked, the flow can be greatly reduced or stop altogether. It should be checked before changing the pressure.

Can sediment block the outlet?

Yes. In lightly filtered beers with yeast, hops, fruit or sediment, a plug can form in the keg, coupler, line or tap.

Should I increase the pressure if no beer is coming out?

Not necessarily. Increasing pressure without a diagnosis can cause foam, leaks or over-carbonation. First you need to check the keg, gas, keg coupler, check valve, line, cooler and tap.

When should I call a technician?

If you’ve checked keg, gas, coupler, pressure, check valve, line, cooler and tap, and the beer still doesn’t come out, it’s best to request technical support to avoid damage or unsafe handling.

Can Install Beer help me if no beer is coming out?

Yes. Install Beer can help you identify the problem, recommend compatible spare parts, or assess technical service, cleaning, or a system check.

Technical note: do not handle pressurized components without shutting off the gas and depressurizing correctly. If there are leaks, ice, persistent blockages, abnormal pressure, or doubts about the coupler, consult qualified technical personnel.