How to Fix Draft Beer System Issues and Stop Pouring Profit Down the Drain

Draft beer is one of the best margins behind your bar on paper, and one of the quietest leaks in practice. A half-barrel should give you around 124 pints. A system that's fighting you gives you 95, and you paid full price for the 29 that foamed down the drain or got poured heavy to make up for it. Nobody sees it. Nobody measures what a keg should give against what it actually did. Fix the system and start counting, and draft goes back to being the money it's supposed to be.

The system issues bleeding your kegs

Foam is money, and almost all of it comes from a handful of things you can fix.

• Wrong CO2 pressure. Too high and every pour is half foam. Too low and it pours flat and slow, so your bartender cracks the tap wide to speed it up, which foams it anyway. Set it to your beer and your line run, not to whatever it was when you took over.
• Warm beer, warm lines. Beer wants to stay cold from the keg to the tap. A warm walk-in, an uninsulated line, a long run through a hot wall, and it foams the second it hits the glass. Cold all the way or it's foam all the way.
• Dirty lines. Lines that don't get cleaned build up gunk that foams the pour, turns the taste, and costs you beer and regulars both. Every two weeks, no exceptions.
• The heavy hand. A pour with two inches of head is short beer to the guest, so the bartender tops it, and now you're giving away the overpour on top of the foam. Bad technique doubles the leak.

Fix the physical system first

Get the mechanics right and most of the foam disappears on its own. Set your CO2 pressure to the beer and the distance it travels. Keep the line cold end to end. Clean your lines every two weeks and log it. And train the pour: glass at an angle, tap wide open, straighten to finish, so a proper pint takes one motion instead of three top-offs. None of that costs much, and it's the difference between 95 pints a keg and 120.

Then measure what you're actually getting

This is the step almost nobody takes. A clean system still leaks if you never check it. Count your kegs like everything else, by how full they are, and let your sales tell you what you should have poured. A keg that should have given 124 pints against sales that only account for 100 is a 24-pint gap, and at your draft price that gap has a dollar figure. That's your draft variance, and it catches the foam, the over-pours, and the freebies the same way it catches a walking bottle of liquor. Fix the system and the gap shrinks. Watch the gap and it stays shrunk.

Draft should be your best pour

Done right, draft is low cost, fast to serve, and high margin, the pour that should print money on a busy night. Done wrong, it's a keg that gives up a fifth of itself to foam and a bartender giving away the rest to fix it. The system side is a weekend of dialing in pressure, cold, and clean. The money side is counting your kegs against your sales every week so the leak can't come back. Do both and the tap line stops being the thing quietly costing you and starts being the thing carrying you.

Want to see draft variance on a real bar? Walk the live demo, count a keg, and watch what it should have poured land next to what your sales say it did.