Fix over-foaming caused by temperature, pressure, or pouring technique.

A small amount of foam is normal, but if your glass fills mostly with bubbles, it&#x2019;s usually caused by beer temperature, carbonation behavior, line cleanliness, glass condition, or pouring technique. Most cases can be resolved with a few simple checks.<h2 data-start="425" data-end="464" id="1-the-beer-is-not-fully-chilled">1. The beer is not fully chilled</h2>Beer that is not completely cold will release CO&#x2082; more quickly during pouring, creating excessive foam.What to do:<ul data-start="589" data-end="717"><li data-start="589" data-end="641" style="font-family: Inter; font-size: 16px;">Allow the keg to fully chill inside the machine.</li><li data-start="642" data-end="717" style="font-family: Inter; font-size: 16px;">If the keg was recently moved, let it rest in cooling mode for 1&#x2013;2 hours.</li></ul><h2 data-start="724" data-end="796" id="2-foam-may-increase-if-keg-pressure-is-higher-after-fermentation">2. Foam may increase if keg pressure is higher after fermentation</h2>If pressure remains on the higher side at the end of fermentation, CO&#x2082; inside the keg will be more active, which can lead to extra foam during pouring.What to do: Keep the keg in cooling mode longer so more CO&#x2082; can dissolve back into the beer.<h2 data-start="1056" data-end="1109" id="3-the-dispensing-tube-or-spout-needs-cleaning">3. The dispensing tube or spout needs cleaning</h2>Residue inside the dispensing line can cause CO&#x2082; to break out rapidly when beer is poured.What to do: Rinse the dispensing tube and spout with warm water, or run a full cleaning cycle.<h2 data-start="1310" data-end="1348" id="4-glass-temperature-or-residue">4. Glass temperature or residue</h2>Warm, dry, or detergent-coated glassware can lead to unstable or excessive foam.What to do: Rinse the glass with cold water before pouring.<h2 data-start="1504" data-end="1545" id="5-pouring-technique-or-flow-speed">5. Pouring technique or flow speed</h2>A fast or steep pour creates turbulence and leads to more foam.What to do:<ul data-start="1630" data-end="1763"><li data-start="1630" data-end="1667" style="font-family: Inter; font-size: 16px;">Hold the glass at a 45&#xB0; angle</li><li data-start="1668" data-end="1692" style="font-family: Inter; font-size: 16px;">Start pouring gently</li><li data-start="1693" data-end="1763" style="font-family: Inter; font-size: 16px;">Use the flow-control clamp on the F1 to adjust the speed if needed</li></ul>This small adjustment often reduces foam immediately.<h2 data-start="1825" data-end="1871" id="6-the-keg-was-recently-moved-or-shaken">6. The keg was recently moved or shaken</h2>Movement activates CO&#x2082; inside the keg and can increase foam.What to do: Let the keg rest and cool for 1&#x2013;2 hours before pouring.<h2 data-start="2015" data-end="2066" id="7-manual-adjustment-if-excess-foam-persists">7. Manual adjustment if excess foam persists</h2>If foam continues even after the steps above, you can reset the keg pressure and stabilize carbonation.Steps:<ol data-start="2186" data-end="2487"><li data-start="2186" data-end="2232" style="font-family: Inter; font-size: 16px;">Disconnect the gas tube from the keg lid.</li><li data-start="2233" data-end="2291" style="font-family: Inter; font-size: 16px;">Pull up the PRV to release all pressure from the keg.</li><li data-start="2292" data-end="2337" style="font-family: Inter; font-size: 16px;">Restart CO&#x2082; mode in the cooling program.</li><li data-start="2338" data-end="2405" style="font-family: Inter; font-size: 16px;">Set the temperature to 37&#xB0;F and the pressure to 6 psi.</li><li data-start="2406" data-end="2434" style="font-family: Inter; font-size: 16px;">Reconnect the gas tube.</li><li data-start="2435" data-end="2487" style="font-family: Inter; font-size: 16px;">Let the keg sit for 48 hours before drinking.</li></ol><h2 data-start="2613" data-end="2630" id="need-help">Need help?</h2>If excessive foam continues after these steps, feel free to contact us at&#xA0;<a data-start="2708" data-end="2725" rel="noopener">support@igulu.com</a>. We&#x2019;re here to help.

Why is there too much foam when I pour my beer?

Troubleshoot blocked tubes, pressure issues, or dispensing setup errors.

If no beer is dispensing from your iGulu machine, it&#x2019;s usually caused by a pressure, valve, or tube connection issue. Follow the steps below to check each possible cause.<hr data-start="373" data-end="376"><h3 data-start="378" data-end="407" id="1-check-the-keg-pressure">1. Check the keg pressure</h3>Swipe left on the machine screen to check the pressure inside the keg.<ul data-start="481" data-end="604"><li data-start="481" data-end="529" style="font-family: Inter; font-size: 16px;">If pressure is too low, beer may not dispense.</li><li data-start="530" data-end="604" style="font-family: Inter; font-size: 16px;">Make sure fermentation has completed and the machine is in Cooling Mode.</li></ul><hr data-start="606" data-end="609"><h3 data-start="611" data-end="665" id="2-make-sure-the-co-system-is-turned-on-s1-only">2. Make sure the CO&#x2082; system is turned on (S1 only)</h3>If you are using external CO&#x2082; on an S1 machine:<ul data-start="716" data-end="841"><li data-start="716" data-end="791" style="font-family: Inter; font-size: 16px;">Ensure the CO&#x2082; adapter valve at the back of the machine is fully open</li><li data-start="792" data-end="841" style="font-family: Inter; font-size: 16px;">Confirm the CO&#x2082; cylinder valve is turned on</li><li data-start="792" data-end="841" style="font-family: Inter; font-size: 16px;">Note: If you are using Air Pump Mode, external CO&#x2082; should not be connected.</li></ul><hr data-start="992" data-end="995"><h3 data-start="997" data-end="1054" id="3-check-the-white-clamp-valve-on-the-dispensing-tube">3. Check the white clamp valve on the dispensing tube</h3>Open the machine lid and check the white clamp valve on the dispensing tube.<ul data-start="1134" data-end="1227"><li data-start="1134" data-end="1178" style="font-family: Inter; font-size: 16px;">The clamp must be in the open position</li><li data-start="1179" data-end="1227" style="font-family: Inter; font-size: 16px;">A closed clamp will completely block beer flow</li></ul><hr data-start="1289" data-end="1292"><h3 data-start="1294" data-end="1344" id="4-check-the-internal-beer-tube-inside-the-keg">4. Check the internal beer tube inside the keg</h3>Remove the keg lid and inspect the vertical beer tube inside the keg.<ul data-start="1417" data-end="1524"><li data-start="1417" data-end="1459" style="font-family: Inter; font-size: 16px;">Make sure the tube is securely connected</li><li data-start="1460" data-end="1524" style="font-family: Inter; font-size: 16px;">A disconnected or loose tube will prevent beer from dispensing</li></ul><hr data-start="1583" data-end="1586"><h3 data-start="1588" data-end="1630" id="5-confirm-your-firmware-is-up-to-date">5. Confirm your firmware is up to date</h3>Outdated firmware may affect dispensing behavior.<ul data-start="1683" data-end="1772"><li data-start="1683" data-end="1703" style="font-family: Inter; font-size: 16px;">Open the iGulu app</li><li data-start="1704" data-end="1742" style="font-family: Inter; font-size: 16px;">Check for available firmware updates</li><li data-start="1743" data-end="1772" style="font-family: Inter; font-size: 16px;">Update the device if needed</li></ul><hr data-start="1774" data-end="1777"><h3 data-start="1779" data-end="1804" id="still-not-dispensing">Still not dispensing?</h3>If all tubing, valves, pressure readings, and firmware appear normal but beer still isn&#x2019;t coming out, please contact our support team for assistance.&#x1F4E7; <a data-start="1962" data-end="1979" rel="noopener">support@igulu.com</a>Include a brief description of the issue and photos or videos if possible to help us diagnose the problem faster.

Why isn’t beer coming out?

Learn what to do when CO₂ isn’t available.

You can dispense beer normally without a CO&#x2082; cylinder by using&#xA0;Air Pump Mode. A cylinder is optional &#x2014; use it only if you prefer CO&#x2082;-assisted pouring or want longer freshness.<hr data-start="445" data-end="448"><h2 data-start="450" data-end="484" id="how-to-dispense-without-co">How to dispense without CO&#x2082;</h2><ol data-start="485" data-end="686"><li data-start="485" data-end="534" style="font-family: Inter; font-size: 16px;">Exit CO&#x2082; Mode if it is currently active.</li><li data-start="535" data-end="686" style="font-family: Inter; font-size: 16px;">Restart the cooling program in&#xA0;Air Pump Mode. Your machine will pressurize the keg using air, allowing you to pour beer without a cylinder.</li></ol><img src="https://attachments.gorgias.help/B9Zby7ZG4KexeNk3/hc/g5KDM28BMRmx9aBy/2025120906-65b9c915-2aac-4a2f-b1a2-d8af351e1466-ed3f6f02-eb6a-4cb1-aa11-6cb19a11d252.png" style="width: 300px;" class="fr-fic fr-dib"><hr data-start="716" data-end="719"><h2 data-start="721" data-end="762" id="if-you-prefer-using-a-co-cylinder">If you prefer using a CO&#x2082; cylinder</h2>You can choose to purchase a new filled CO&#x2082; cylinder or contact your local gas supplier for a refill or exchange. This is optional and not required for dispensing.<hr data-start="930" data-end="933"><h2 data-start="935" data-end="982" id="when-to-use-co-instead-of-air-pump-mode">When to use CO&#x2082; instead of Air Pump Mode</h2>CO&#x2082; is recommended if you want:<ul data-start="1015" data-end="1157"><li data-start="1015" data-end="1059" style="font-family: Inter; font-size: 16px;">Better long-term freshness after tapping</li><li data-start="1060" data-end="1111" style="font-family: Inter; font-size: 16px;">More stable pressure during extended dispensing</li><li data-start="1112" data-end="1157" style="font-family: Inter; font-size: 16px;">Support for bottling or transferring beer</li></ul>For normal home use and casual pouring, Air Pump Mode is sufficient.

How to dispense beer without a CO2 cylinder or if the cylinder is empty?

Learn why foam may push through the lid and how to prevent it.

If you notice liquid overflowing from the tube or keg during fermentation, it&#x2019;s usually caused by pressure release issues or an incorrect setup. This is a common and easy-to-fix problem.Below are the most common reasons and how to resolve them.<hr data-start="418" data-end="421"><h2 data-start="423" data-end="456" id="most-common-causes-of-overflow">Most Common Causes of Overflow</h2><h3 data-start="458" data-end="495" id="1-the-tube-is-not-fully-inserted">1. The tube is not fully inserted</h3>If the tube is not securely inserted into the dispensing outlet or faucet, pressure may escape unevenly and cause liquid to overflow.What to do:<ul data-start="647" data-end="765"><li data-start="647" data-end="712" style="font-family: Inter; font-size: 16px;">Push the tube firmly into the outlet until it is fully seated</li><li data-start="713" data-end="765" style="font-family: Inter; font-size: 16px;">Make sure there are no gaps or loose connections</li></ul><hr data-start="767" data-end="770"><h3 data-start="772" data-end="828" id="2-the-valve-is-not-fully-closed-during-fermentation">2. The valve is not fully closed during fermentation</h3>During fermentation, the valve must remain in the&#xA0;closed position. If the valve is open, internal pressure may force liquid out through the tube.What to do:<ul data-start="998" data-end="1108"><li data-start="998" data-end="1062" style="font-family: Inter; font-size: 16px;">Confirm the valve is fully closed before fermentation starts</li><li data-start="1063" data-end="1108" style="font-family: Inter; font-size: 16px;">Do not open the valve during fermentation</li></ul><hr data-start="1110" data-end="1113"><h3 data-start="1115" data-end="1160" id="3-the-dispensing-outlet-is-not-tightened">3. The dispensing outlet is not tightened</h3>A loose dispensing outlet can allow air leakage, which disrupts pressure balance and leads to overflow.What to do:<ul data-start="1282" data-end="1382"><li data-start="1282" data-end="1340" style="font-family: Inter; font-size: 16px;">Check that the dispensing outlet is securely tightened</li><li data-start="1341" data-end="1382" style="font-family: Inter; font-size: 16px;">Ensure the gasket is properly aligned<img src="https://attachments.gorgias.help/B9Zby7ZG4KexeNk3/hc/g5KDM28BMRmx9aBy/2025112708-7fb170b4-049f-4583-9df3-608cbe69fa73-overflow.png" style="width: 680px;" class="fr-fic fr-dib"></li></ul><hr data-start="1384" data-end="1387"><h2 data-start="1389" data-end="1411" id="important-reminders">Important Reminders</h2><ul data-start="1413" data-end="1618"><li data-start="1413" data-end="1474" style="font-family: Inter; font-size: 16px;">Do not dispense or open the valve during fermentation</li><li data-start="1475" data-end="1538" style="font-family: Inter; font-size: 16px;">Always double-check tube connections before starting a brew</li><li data-start="1539" data-end="1618" style="font-family: Inter; font-size: 16px;">Overflow during fermentation is usually a setup issue, not a machine defect</li></ul><hr data-start="1620" data-end="1623"><h2 data-start="1625" data-end="1648" id="still-having-issues">Still Having Issues?</h2>If you&#x2019;ve checked all the steps above and your brew is still overflowing, please contact <a data-start="1741" data-end="1758" rel="noopener">support@igulu.com</a> and include:<ul data-start="1774" data-end="1869"><li data-start="1774" data-end="1810" style="font-family: Inter; font-size: 16px;">A brief description of the issue</li><li data-start="1811" data-end="1869" style="font-family: Inter; font-size: 16px;">Clear photos of the tube connection and valve position</li></ul>Our support team will help you troubleshoot further.

Why is my brew overflowing?

Need help with your iGulu machine or order? Our support team is here to assist.

Need urgent assistance? Our support line is available Monday–Saturday, 9 AM – 6 PM PST.

iGulu

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