What does a sound draft pour look like, and when does foam point to a system problem rather than technique?
Start with the glass
A draft pour should move beer into the glass with control. The angle, tap position, line condition, gas balance, temperature, and glass all interact. Foam is not automatically a technique failure, and a fast pour is not automatically efficient.
Separate the variables
Start with a clean glass and a fully open faucet. Let the beer meet the side of the glass, then ease the vessel upright as the fill rises. The target is a stable head that protects aroma without consuming the serving. If the faucet is partly open, turbulence can make the result worse.
Make the note useful
Troubleshoot from the system outward. Persistent foam across different clean glasses can point to temperature, pressure, line cleanliness, or balance. A single poor pour can simply be angle or faucet control. Change one variable at a time so the fix has a chance to teach you something.
Respect the limits
Record what happened: keg or package, time since service, glass condition, line setup if known, and whether the beer was moved. That short log is more useful than repeating the same motion with more force.
A small next step
For a home pour, the practical aim is clarity. For a team, it is consistency. Both benefit from the same rule: observe the whole system before blaming the hand holding the glass.
Control the pour
Begin with a clean, properly prepared glass and a faucet opened fully. Let the beer meet the side of the vessel, then bring the glass upright as the level rises. A stable head protects aroma and gives the drink structure, but foam volume depends on the beer, glass, temperature, pressure, line, and package. Technique is one part of a draft system, not the entire diagnosis.
Troubleshoot from the system
Persistent foam across clean glasses can point to beer temperature, gas balance, pressure, line restriction, dirty lines, a faucet problem, or beer that was agitated. A single bad pour can be angle or faucet control. Record keg or package, time since movement, glass condition, temperature if known, and whether the symptom appears at more than one tap. Change one system variable at a time.
Example in service
A hospitality team should agree on glass handling, faucet position, pour sequence, and what counts as an exception. A home brewer should resist turning the regulator up to force a faster serve before checking temperature and line behavior. Repeatedly dumping foam wastes beer and hides the cause. A short service log can reveal whether the problem follows one keg, one line, one location, or every pour.
Safety and sources
Draft equipment carries pressure, so use compatible components, inspect connections, and follow the keg, regulator, cylinder, and cleaning-product instructions. Never improvise a pressure vessel or ignore a leak. The Brewers Association Draught Beer Quality Manual is the primary service reference here. It informs the method, but a site-specific installation still needs its equipment documentation and qualified help when pressure safety is uncertain.
Context before numbers: What does a sound draft pour look like, and when does foam point to a system problem rather than technique?
