How long is too long?

Yeast & Fermentation
1

I’m using a primary and a secondary.

Can beer sit too long in either one and what are the rusults?

2

If you let beer sit to long on the yeast bed you will get autolysis. However it takes a LONG time for this to occur. I have read that it can take as long as 18 months, so there is no worry. I have let beers in secondary for 9-10 months with no I’ll effects.

3

I do not like to let anything sit in a plastic primary for more than 4 weeks.

4

I have an IPA stranded in Primary because my bottling equipment is infected. Well, I think it is so I’ve bought all new plastic parts. Anyway, it’s been on the yeast cake for over 5 weeks. Took a sample and can’t taste anything off.