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Originally Posted by snafu
Net CO2 loss would be around 0.0087 / 0.13 = 6.6% per ft of tubing. so, a short run of silicone tubing (i.e., several feet could mean a non-trival amount of CO2 loss).
-snafu
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My current system uses a combination of polyethylene and vinyl and total run is about 12 feet. If it was silicone this means CO2 loss from the tubing would be 79%!!? Is there something wrong with my math?
If not, it seems you really do want to avoid silicone. Amazingly, Foster & Smith has a semi-automatic CO2 injection system
http://www.drsfostersmith.com/Produc...&N=2004+113924 that comes with 20 feet of silicone tubing.