New Idea: Groove Air Vent Cart - GAV Cartridge

**harpo** · 02-05-2010, 04:02 PM

Originally Posted by l3oertjie

I haven't tried that yet - does it fill easily? My thoughts were that it would be easier for the liquid to drain into the atty through a wick. I found that just by using a spring it sometimes forms an air bubble below and you can’t get the fluid to fill properly. Let me know - will take mine out - precious volume you know - gotta be at least one more drag from it!

I pull the plug when I refill and get 13 to 14 drops. I'll try refilling with the plug in and let you know. I always find it easier and quicker to pull the plug.

**harpo** · 02-05-2010, 04:03 PM

By the way I think this will work with just about any cart mod.

**l3oertjie** · 02-05-2010, 04:04 PM

I agree - and it's so simple to do.

**Pete54** · 02-05-2010, 05:30 PM

I just tried using this with the BFD mod. I made a hole on either side of the cart, but on the FLAT sides, without a groove. My thinking is that the flat sides have unrestricted air flow. If the holes aren't too big, it won't leak because the foam is in the top of the cart where the holes are. So far this is working well.
Update.
After using this, it didn't really help much at all. I'm sure that your original method works better.

**pvherman** · 02-08-2010, 03:09 AM

Trying this mod with the PTB and a slight mod to the bag to reduce flooding, so far so good...ill keep it posted

**DC2** · 02-08-2010, 05:46 PM

I'm assuming that you need the hole to be in the middle of the filler material, and that if the hole was even slightly under the filler material it would leak out and come up through the groove?

**l3oertjie** · 02-09-2010, 07:36 AM

DC2,

The hole must be below the filter material to allow air directly to the liquid reservoir.

The viscosity of the PG fluid compared to air makes it impossible to leak through the air vent groove!

Just as a matter of interest - PG liquids contain in the region of approximately 80% propylene glycol and the viscosity of the liquid would be between 0.015Pa.s to 0.020Pa.s. Air for that matter has a viscosity of 17.4x10^-6Pa.s at 20ºC - 1000 times less than the PG liquid!

The vacuum in the reservoir (caused by the suction of the atomizer evaporating PG liquid) will draw air through the path of least resistance - the air vent groove in this case.

I have actually made a cart with the air vent cut all the way through the plastic and it still works fine. See the attached pictures.

Cheers!