Can a keg get oxidised through the beer line / tap?
I've been trying to track down the cause of oxidation. Last brew was fermented in a fermzilla, i didn't dry hop, just large whirlpool addition. Keg purged from fermentation, closed transfer. After 2 weeks connected to my beer line and tap and the beer was amazing. 10 days later the hop flavour had pretty much gone. Then a week later I poured a beer and the first beer was horrendous, tasted really badly oxidised, sherry like flavour(this would have had a large portion off beer from the line in). I braved another and this was no where near as bad, just seemed lightly oxidised and lack of hop flavour. I didn't think it could oxidise through the beer line or tap back into the keg?
I use eva barrier.
Any thoughts?
I've been trying to track down the cause of oxidation. Last brew was fermented in a fermzilla, i didn't dry hop, just large whirlpool addition. Keg purged from fermentation, closed transfer. After 2 weeks connected to my beer line and tap and the beer was amazing. 10 days later the hop flavour had pretty much gone. Then a week later I poured a beer and the first beer was horrendous, tasted really badly oxidised, sherry like flavour(this would have had a large portion off beer from the line in). I braved another and this was no where near as bad, just seemed lightly oxidised and lack of hop flavour. I didn't think it could oxidise through the beer line or tap back into the keg?
I use eva barrier.
Any thoughts?