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First wort hopping & Gravity

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#1 brewman

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Posted 06 April 2013 - 03:28 PM

When taking the pre boil gravity reading when you are also first wort hopping wont the hops affect the gravity of the wort or is this taken for granted in what you are looking for.Dan
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#2 denny

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Posted 06 April 2013 - 03:36 PM

Nope. In order for something to affect gravity, it has to be dissolved into solution.
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#3 brewman

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Posted 06 April 2013 - 03:39 PM

Cool, Thanks. Makes since now that you say it.Dan
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#4 Mando

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Posted 06 April 2013 - 03:51 PM

Nope. In order for something to affect gravity, it has to be dissolved into solution.

poodles! in before the lock. etc.
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#5 MtnBrewer

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Posted 07 April 2013 - 07:30 AM

When taking the pre boil gravity reading when you are also first wort hopping wont the hops affect the gravity of the wort or is this taken for granted in what you are looking for.Dan

If you have pellet hops floating around in your hydro sample, yes they will affect the gravity reading. Take the reading before you add the hops.

#6 djinkc

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Posted 07 April 2013 - 08:03 AM

If you have pellet hops floating around in your hydro sample, yes they will affect the gravity reading. Take the reading before you add the hops.

That's tough to do with FWH. B)I don't bother when that is the case.
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#7 MtnBrewer

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Posted 07 April 2013 - 08:28 AM

Shouldn't be that hard. Just get the sample before you add the hops to the kettle. Or pull the tubing off of the kettle long enough to grab a sample.

#8 djinkc

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Posted 07 April 2013 - 08:37 AM

Shouldn't be that hard. Just get the sample before you add the hops to the kettle. Or pull the tubing off of the kettle long enough to grab a sample.

When I first wort hop the only thing in the kettle when I add hops is air.
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#9 denny

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Posted 07 April 2013 - 08:51 AM

poodles! in before the lock. etc.

I made a conscious effort to avoid the comparison....
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#10 denny

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Posted 07 April 2013 - 08:52 AM

If you have pellet hops floating around in your hydro sample, yes they will affect the gravity reading. Take the reading before you add the hops.

I haven't noticed that. Next time I FWH with pellets, I'll take gravity reading both before and after adding them.
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#11 miccullen

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Posted 07 April 2013 - 10:34 AM

I haven't noticed that. Next time I FWH with pellets, I'll take gravity reading both before and after adding them.

please do
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#12 MtnBrewer

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Posted 07 April 2013 - 11:16 AM

I haven't noticed that. Next time I FWH with pellets, I'll take gravity reading both before and after adding them.

Yes do. You'll see that if they're still in suspension, the hydrometer must lift them, which makes it float higher and read a higher gravity. When all that stuff settles out, the hydrometer will sink and read lower.

#13 djinkc

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Posted 07 April 2013 - 11:59 AM

Yes do. You'll see that if they're still in suspension, the hydrometer must lift them, which makes it float higher and read a higher gravity. When all that stuff settles out, the hydrometer will sink and read lower.

I don't understand - when are you guys adding your first wort hops?Two cups at my place, one with tap water, one with about 8 dissolved pellets in tap water. Same temp - 1.000 . I don't think the particles are fine enough. Of course n=1
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#14 miccullen

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Posted 07 April 2013 - 12:13 PM

I don't understand - when are you guys adding your first wort hops?Two cups at my place, one with tap water, one with about 8 dissolved pellets in tap water. Same temp - 1.000 . I don't think the particles are fine enough. Of course n=1

when are you adding them?I have always put them in the kettle before mash runoff, they are in there when the first wort comes from the tun.
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#15 djinkc

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Posted 07 April 2013 - 12:23 PM

when are you adding them?I have always put them in the kettle before mash runoff, they are in there when the first wort comes from the tun.

The same, first thing in the kettle. I'm reading posts above that you can take a gravity before adding the FWH addition. I guess you could if you were no sparging and caught some of the initial runoff for a gravity reading.
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#16 MtnBrewer

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Posted 07 April 2013 - 12:43 PM

The same, first thing in the kettle. I'm reading posts above that you can take a gravity before adding the FWH addition. I guess you could if you were no sparging and caught some of the initial runoff for a gravity reading.

You're right. I'm a dumbass. Should still affect gravity though if they're suspended. However by the time you measure pre-boil gravity it will be so dilute that it won't matter.

#17 miccullen

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Posted 07 April 2013 - 12:46 PM

You're right. I'm a dumbass. Should still affect gravity though if they're suspended.

should they not be saturated, and thus equal to the wort in density?these discussions never get old :D
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#18 denny

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Posted 07 April 2013 - 01:14 PM

I don't understand - when are you guys adding your first wort hops?Two cups at my place, one with tap water, one with about 8 dissolved pellets in tap water. Same temp - 1.000 . I don't think the particles are fine enough. Of course n=1

That's what I've seen before and would expect.
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#19 djinkc

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Posted 07 April 2013 - 01:15 PM

My preboil readings are taken with a refractometer. It's hard to get anything worthwhile with all the hop material already in the wort. I'm not going to bother with a hydrometer reading at that point. I just wait until the end and use the hydrometer and usually there's no surprises.
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#20 SteveMillerTime

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Posted 08 April 2013 - 06:09 AM

I FWH all of my beers...I've never noticed a "high" gravity reading on my pre-boil even when there is particles floating in my test jar...The reason the hydrometer is floating higher or lower is due to sugar content. In theory, the only thing having any sort of floating debris in your test jar (or theif) does is makes the liquid level higher. When the hydrometer is dropped in, it pushes the debris away, the debris don't push it up.think about the way the hydrometer floats in relation to how your body floats on salt water. Your buoyancy is your buoyancy regardless if there's seaweed floating around you...when diving, you don't add more weight to your belt because you see a lot of seaweed (or other debris).
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