Holly, the
tanks are not an SI product, and I probably shouldn't name any names here. If you search for "DCT tank" you'll find a bunch of places that have them. I'm not sure, but I don't think I ever found any for an 808 cartomizer. If you buy the longer DCT tanks you'll have to buy the SI XL cartos. Or buy the shorter DCT tank that fit the SI regular cartos. This is what they look like:
View attachment 158017
A hole is made near the bottom of the carto and that feeds juice to the carto. You fill the carto with juice and then push the carto into the tank but not all the way. Then fill the tank with juice and finally pushing the carto in so that it lays somewhat flush with the top and bottom. Add a drip tip and you're off vaping. This works best on the manual X2 batteries. A few powerless draws (don't push the button), and you'll get the air pressure right so that the juice in the tank feeds the carto.
This means less time filling your carto and more time vaping. The cartos seem to last longer with this method. As you can see, if you're going to vape this way, you must like vaping with a cartomizer.
I might not have explained all this well. If you have questions, I'll gladly answer them. Also a "DCT tank" search on google will pick up some videos to watch.
There are a number of different ways to put the hole (or two) in the cartomizer. There are a number of products sold for carto hole punching. I just use a 1/4" saddle valve that I bought at Home Depot. Often times the vaping vendors sell you a tank with a dual coil cartomizer. It's kind of a waste because you're not going to use that carto. You're going to be using SI's. If you look, you'll find vendors that just sell the tank and end caps.
I love SI's cartomizers. They are really good. And this gives me a way of vaping with the SI cartomizer without constant re-filling.
I hope I didn't confuse you.