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Old 02-17-2013, 04:21 PM   #1
citabria
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Mar 2007
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Hey new AG brewers: Don't make my dumb mistake. I made my first all grain 3 batches ago. It had it's issues but i chalked it up to me learning a new process. second batch went better but I has an inorganic medicine taste going on. The third batch was a repeat of batch #2's recipe. I nailed everything. Mash temp, OG, you name it. After 6 weeks of fermentation and conditioning I opened a bottle. Still that medicine taste! What happened??? After some accidental reading, I found out I was incorrectly using a low temperature racking hose to transfer hot wort to the kettle.
So I set up an experiment. I ran hot water through the hose, then poured a control into a cup that had not been through the hose. Sure enough, the hose was leaching off a terrible medicine flavor into the water. I read everything when I built my mash tun. I never saw that I needed a special high temp hose. Oh well, I was almost ready to quit. Don't do what I did

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Old 02-17-2013, 05:31 PM   #2
jmh286
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I think you may have something going on with your hose. I don't use high temp tubing and have never had a problem with off-flavors. Most vinyl tubing is good up to 160F. At least that's the stuff I bought at Lowe's.
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Old 02-17-2013, 05:40 PM   #3
Stocktonbrew
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I have never noticed off flavors from the pvc tubing. That said, I just switched over to all silicone. It is expensive but easy to use( does'nt coil up) and no worries about chemicals.

 
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Old 02-17-2013, 05:43 PM   #4
Stocktonbrew
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As for the medicinal taste, are you treating your water for chlorine/chloromine?

 
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Old 02-17-2013, 07:42 PM   #5
guldalian
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Mar 2012
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I too use regular type vinyl tubing. No problems so far.

 
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Old 02-17-2013, 08:09 PM   #6
brewkinger
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I also use vinyl tubing with no problems. Although you do want to watch the temperatures when using it. Do this little experiment. Put a piece of vinyl hose in cup of boiling water, one in water that is 180-190 degrees and a third in 150 degree water.

The boiled sample actually has the odor (i chose not to drink it based on this)

The 2nd sample did not smell but tasted off

The third sample was just fine.

I use the vinyl for everything except transferring mash and sparge water. I bought a 4 foot piece of silicone tubing for this purpose.
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Old 02-17-2013, 08:33 PM   #7
citabria
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Mar 2007
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I'm surprised. My taste test at170F made it obviously clear that I awe getting off flavors form the vinyl tubing. The wife agreed she could taste the difference.

 
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Old 02-17-2013, 11:43 PM   #8
guldalian
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Yeah I do use it to collect runnings. No ill effects as I said, but perhaps I'll switch just to be safe.

 
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Old 02-18-2013, 12:42 AM   #9
SlowDrains
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My lhbs only had the PVC hose he said that's what he uses for all his mash tuns

 
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Old 02-18-2013, 01:04 AM   #10
SlowDrains
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Dec 2012
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I also just looked up the tubing I have it's bevlex 200 tempature rating up to 180

 
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