odd taste

[kram7677]

I have a 1/6 kegof sam summer temp has been left around 36-40 pressure @ 12 lbs with 5' of line in a new micromatic conversion kit in a new fridge. I am down to 1/4 of keg left and am having lots of foam @ pour ( 1/4 ofglass ) which dissipates quickly, but today i noticed a slightly bitter taste, could this be co2? I tapped keg 8-10-07 so it is not to old please help, I am in richmond va

[goodturns]

it could be CO2, but the pressure seems too low to overcarbonate, that is assuming the regulator is working properly. A brand new regulator is unlikely to be faulty, but not impossible. Realistically, the only way I know of the check if regulator is working is to hook up another and see if they jive. Check that the temp. is steady w/ a high/low thermometer, if it drops to freezing at night, you could overcarbonate (which will give a bitter, metallic taste as CO2 is a signifigant flavor component in any beverage).

[Scott Zuhse]

Your temperature swing makes it difficult to dial in the correct pressure. Try to adjust refrigeration to be more consistent. The bitter taste could be over carbonation or old beer. At 12 PSIG, doubtful you have over carbonation.