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Forum: Equipment/Sanitation 06-07-2013, 01:04 PM
Replies: 1
Views: 185
Posted By downpantera
White ring of film from extended contact with PBW

I have seen in kegs and glassware that if PBW is allowed to sit for a long time with exposure to air, a white ring forms. I can't seem to get rid of this. I've tried Bar Keeper's Friend, more PBW,...
Forum: General Techniques 03-15-2013, 04:13 PM
Replies: 8
Views: 3,022
Posted By downpantera
Gypsum will lower your mash pH, not raise it. To...

Gypsum will lower your mash pH, not raise it. To raise the pH, use baking soda or chalk. You need very little baking soda, say ~ 1 gram to go up by 0.1, depending on thickness. You need a whole lot...
Forum: Bottling/Kegging 02-27-2012, 11:28 AM
Replies: 0
Views: 535
Posted By downpantera
Cooper's Carbonation Drops for Belgian Beer

I have a batch of a Belgian Quad that is 5 weeks old and I want to bulk age it for another couple of months before bottling. I was wondering if I wanted to bottle a few for competition first and...
Forum: Bottling/Kegging 07-13-2011, 10:25 PM
Replies: 15
Views: 1,944
Posted By downpantera
Sounds about right, cruelkix.

Sounds about right, cruelkix.
Forum: Bottling/Kegging 07-13-2011, 06:39 PM
Replies: 15
Views: 1,944
Posted By downpantera
I realize this is a dead post, but I thought it...

I realize this is a dead post, but I thought it would be good to share:
http://www.engineeringtoolbox.com/gases-solubility-water-d_1148.html

It shows at atmospheric pressure Nitrogen is soluble...
Forum: Equipment/Sanitation 06-21-2011, 06:22 PM
Replies: 61
Views: 5,422
Posted By downpantera
Well something to think about is that if the cure...

Well something to think about is that if the cure layer has been breached (by drilling holes and/or not using cement to seal the joints) the extraction coefficient is much larger and the decay is...
Forum: Equipment/Sanitation 06-21-2011, 02:14 PM
Replies: 61
Views: 5,422
Posted By downpantera
HHP: Yes, that is the case. There is the law of...

HHP: Yes, that is the case. There is the law of limiting returns meaning that if the total amount of organotin in the pipe is x than say brew 1 leaches 30%x and each subsequent brew will leach less....
Forum: Equipment/Sanitation 06-20-2011, 08:44 PM
Replies: 61
Views: 5,422
Posted By downpantera
SO I've read the whole paper a few times, and the...

SO I've read the whole paper a few times, and the results it reports seems to be only that of the loop experiment, where the only CPVC in contact with the extractant is the surface. Some of the other...
Forum: Bottling/Kegging 06-17-2011, 07:43 PM
Replies: 7
Views: 1,271
Posted By downpantera
One thing to be careful about is that oxygen is...

One thing to be careful about is that oxygen is much more soluble in beer when the beer is cold. This could hasten oxidation in the beer if racking, stirring and filling while cold. Also the sugar...
Forum: Equipment/Sanitation 06-16-2011, 04:28 PM
Replies: 61
Views: 5,422
Posted By downpantera
Broadbill: A) I never said we had data...

Broadbill:

A) I never said we had data suggesting that organotins are bad for you and wasn't willing to share that. You misread me. There is tons of literature on how bad they are and why they are...
Forum: Equipment/Sanitation 06-16-2011, 04:05 PM
Replies: 61
Views: 5,422
Posted By downpantera
Sorry, I don't know anything about PEX. That is...

Sorry, I don't know anything about PEX. That is not my area of work. Sorry!
Forum: Equipment/Sanitation 06-14-2011, 09:08 PM
Replies: 61
Views: 5,422
Posted By downpantera
How did you read that so quickly? I guess I'm a...

How did you read that so quickly? I guess I'm a slow reader. I'll look over it (it's very dense) and get back to you. One thing I would bring up is that it's from 1982, almost 30 years old. Just as a...
Forum: Equipment/Sanitation 06-14-2011, 08:48 PM
Replies: 61
Views: 5,422
Posted By downpantera
For all those looking for proof, here are two...

For all those looking for proof, here are two papers similar to the work I'm doing, but on PVC. The data is a bit lower on CPVC, but again I can't release numbers.:
...
Forum: Equipment/Sanitation 06-14-2011, 08:32 PM
Replies: 61
Views: 5,422
Posted By downpantera
Ummm, the MSDS and toxicity reports say how...

Ummm, the MSDS and toxicity reports say how dangerous it is, not the industries. The EU's REACH and the US's EPA regulate how much can be in a product and be legally used in commercial/residential...
Forum: Equipment/Sanitation 06-14-2011, 07:23 PM
Replies: 61
Views: 5,422
Posted By downpantera
That is not the way things are done in industry....

That is not the way things are done in industry. That is academia and the public sector, when advancement of knowledge is a desired goal. In industry having an upper hand on your competitors and...
Forum: Equipment/Sanitation 06-14-2011, 07:17 PM
Replies: 23
Views: 1,757
Posted By downpantera
A) If you clean your keggles with PBW at the end...

A) If you clean your keggles with PBW at the end of brewing why do you do it again at the beginning?
B) Why use bleach at all if you're just going to rinse in star san any way?
C) 12 - 14 hrs? Do...
Forum: Equipment/Sanitation 06-14-2011, 06:57 PM
Replies: 61
Views: 5,422
Posted By downpantera
Good riddance masshole. We all know there is a...

Good riddance masshole. We all know there is a difference b/w toxicity, cancer suspect agents and death. You're not funny.:off:
Forum: Equipment/Sanitation 06-14-2011, 06:54 PM
Replies: 61
Views: 5,422
Posted By downpantera
I never intended to post that info on here at...

I never intended to post that info on here at all. A friend of mine posted it after I told him about what I thought. I just came on here to defend it. I know people want to defend something they use...
Forum: Equipment/Sanitation 06-14-2011, 06:43 PM
Replies: 61
Views: 5,422
Posted By downpantera
Part of my own research project I've been working...

Part of my own research project I've been working on for the past three years. It's not public. It is confidential, owned by my employer.
Forum: Equipment/Sanitation 06-14-2011, 06:40 PM
Replies: 61
Views: 5,422
Posted By downpantera
Again I run into confidentiality issues. Legally...

Again I run into confidentiality issues. Legally I can't say how much leaches out, but like I said, above 150F you get into the acutely toxic levels, and that's at neutral pH's.

Toxicity levels...
Forum: Equipment/Sanitation 06-14-2011, 05:42 PM
Replies: 61
Views: 5,422
Posted By downpantera
Well I can't speak to specifics as I am under a...

Well I can't speak to specifics as I am under a confidentiality agreement. All I can legally say is that an increase of temperature exponentially increases the efficiency of leaching organotin into...
Forum: Equipment/Sanitation 06-14-2011, 05:25 PM
Replies: 61
Views: 5,422
Posted By downpantera
Thanks for the correction there. Sorry for the...

Thanks for the correction there. Sorry for the mistake.
Forum: Equipment/Sanitation 06-14-2011, 03:21 PM
Replies: 61
Views: 5,422
Posted By downpantera
I was the source used in the original post. My...

I was the source used in the original post. My background is in organic and polymer chemistry, particularly synthesis. I have been working for three years now doing research on removing unreacted...
Forum: Georgia HomeBrew Forum 01-19-2011, 05:09 PM
Replies: 0
Views: 1,881
Posted By downpantera
2011 Peach State Brew Off - Homebrew Competition

Hey fellow brewers!

I wanted to get the word out that we are getting ready for another Peach State Homebrew Competition, in Atlanta, GA. This competition is one of the country's biggest, at nearly...
Forum: Bottling/Kegging 11-15-2010, 12:56 PM
Replies: 4
Views: 3,078
Posted By downpantera
I haven't done anything with fans, but I did...

I haven't done anything with fans, but I did drill a few holes for CO2 lines and a temperature probe, using rubber grommets to seal the excess space.
I thought the idea of a fan was to circulate air...
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