I have seen a few threads about these, and have seen them for sale from some ecig vendors. The prices are usually listed anywhere from 7-20 bucks depending on where you go.
They are called "self tapping saddle valves". (image below)
http://www.dialmfg.com/HighDefPictures/9267-74 - 2005 HD.jpg
I was looking around for one, because I forgot to add it to my last order. I called Lowe's and they had em for $3.99. I bought 2 and they work well.
Figured I would share as its the cheapest I've seen for such a great tool.
-Leo
They are called "self tapping saddle valves". (image below)
http://www.dialmfg.com/HighDefPictures/9267-74 - 2005 HD.jpg
I was looking around for one, because I forgot to add it to my last order. I called Lowe's and they had em for $3.99. I bought 2 and they work well.
Figured I would share as its the cheapest I've seen for such a great tool.
-Leo