[baII23]

I had started a thread about a month and a half ago regarding nitro based beers to pour flat (Guinness looks like coffee; tastes bad). The unusual problem was that it would move from beer to beer to the point where some would pour fine and others flat, then it would change the next day so each beer never remained consistent.

Fast forward: We've replaced the gas blender, put each nitro beer on its own regulator, turned up the pressure on each, hooked up certain beers to its own blended tank, replaced tavern heads and faucets, double checked liquid temps and bath temps, and we are still having problems. We initially thought it could be a leak, but have since ruled that out.

A temporary fix (like when we have a bad pouring beer on special) is simply to move the nitro beer to whatever line seems to be pouring well. The beer pours perfect after moving it, up until it starts pouring flat again (usually a couple of days later).

Something to take into consideration is that there hadn't been any major changes for 18 months before the problem intially surfaced, so we can't necessarily look at one particular area.

Today, we had the same 'ol problem, so I decided not to touch the gas lines at all. I simply switched out the beer line only, and it pours perfect, a complete 180. Soooo, my question is, aside from installing all new trunk lines and replacing all beer lines to fix it... What in the world could be causing the problem? How can a beer line affect gas quality? Is it gas quality? Help!?

We (our Micromatic service rep and local distributor rep) are knee deep in trying to solve the problem, but I thought to send another post out there to see if anyone could think up a reason for why we've been experiencing the problems we have been.

I appreciate any help and happy beer drinking!