Guys... it's not price at all!
1/2ID 5/8 OD is
$18.67 for 10 FEET!!!
http://www.vwrsp.com/catalog/product...ect_id=0013719
that's $1.87 a foot!
Class VI Medical Grade Silicone Rubber Tubing is
$5.52 a foot at Mcmaster.com
that's the clear stuff.
the regular is $1.22 for the off white, and $1.33 for the red
it's about the same cost, and this stuff seems like it will be better.
Besides, I've heard reports that Silicon tubing tends to absorb Water Wetter, which I could se becoming a problem (unvarified tho)