Off taste in new keg system - cleaning?

Brewing Processes
1

I just hooked up a new two-tap faucet system in my fridge downstairs that’s fantastic, but I am experiencing a plastic off-taste when I let the beer sit for a day or so in the lines (about 5 feet). Last night and tonight I even experimented with tasting the first couple ounces after sitting over night vs. getting it from the keg - a definite plastic taste vs. no plastic taste.

Is there any way to pre-clean these lines so they don’t have this taste or do I just have to wait for the lines to get un-plasticy?

2

All of the standard-issue beer line I have ever bought from homebrew supply shops has been odorless and tasteless, even brand new.  Did it come from a homebrew supply shop or commercial beverage source?  Or from another source  like a hardware store?  You should not be able to taste the hose.

3

The hose came from morebeer.com of which I’ve ordered tons of stuff from and is a homebrew company.

4

I friend of mine got some from morebeer once and had the same problem.  He tried for a long time to get rid of the smell/flavor but he never could.  He ended up getting new line free from morebeer and didn’t have a problem with it.  I think sometimes they get bad lots from their supplier.  I would contact them and tell them about the problem and see what they’ll do.

5

I had a similar experience a couple of years ago with some beer line from MoreBeer.
Couldn’t get rid of the plastic taste and MoreBeer replaced the line for me.
The new line is fine.

6

So I did a little experiment and switched out the plastic tasting hose from a hose from my local homebrew shop and low and behold no nasty plastic taste. I just smelled the hose that I took off - whew - stinks. It has “superflex pvc tubing” on the side rated at 212F, thus I’m not feeling this is food grade. I called morebeer.com and left a message but thanks for the tip about switching out the hoses. Beer tastes fine now.

7

I’ve experienced that same issue with beverage tubing that I’ve purchased from both Nothern Brewer and Micromatic.

8

If it is not clearly marked as beverage line, it is questionable. As others have stated there have been bad batches of even the good stuff. New lines should need nothing but a rinse with water at most and should never be carrying taste and odor.

9

Not imparting flavors and odors is part of the test for food grade certification, so I’d guess it was a bad batch or a different supplier than normal.