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"Food Grade" propylene glycol? - Page 2

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Posted by Duane C. Johnson on September 23, 2005, 10:43 am
 
Hi Nolan;



Automobile propylene glycol antifreeze has all nasties in
it that is in conventional ethylene glycol antifreeze.
Rust inhibitors and the like.

OK, it is much less poisonous to animals. However, that
loop is not allowed to be in contact with potable water
unless there is a double barrier.


Food grade, or close to it, is the stuff that RV dealers
use for winterizing their water systems.

Duane

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Posted by Steve Spence on September 23, 2005, 2:16 pm
 
Nolan Tucker wrote:

Just ask for the RV designated stuff. Shouldn't be any "pressure".



--
Steve Spence
Dir., Green Trust, http://www.green-trust.org
Contributing Editor, http://www.off-grid.net
http://www.rebelwolf.com/essn.html

Posted by Steve Spence on September 23, 2005, 2:40 pm
 Steve Spence wrote:


ok, no "pressure", is on our drainback system, we don't run it
"pressurized".
pumps do create "pressure" as does the solar heated expansion of the
coolant in a closed loop system,.



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Steve Spence
Dir., Green Trust, http://www.green-trust.org
Contributing Editor, http://www.off-grid.net
http://www.rebelwolf.com/essn.html

Posted by Paul on September 23, 2005, 4:18 pm
 

FYI - I read that making biodiesel also produces glycol that can be used to
         make antifreeze. Even better payback.



Posted by Steve Spence on September 23, 2005, 6:39 pm
 Paul wrote:


yep, we posted an article about that a ways back at
http://www.green-trust.org/2005/08/glycerin-biodiesel-byproduct-makes.html


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Steve Spence
Dir., Green Trust, http://www.green-trust.org
Contributing Editor, http://www.off-grid.net
http://www.rebelwolf.com/essn.html

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