Fly High Pro X Check Valve Filling Adapter?

[Ks]

Has anyone tried this product?

I don't understand how it works.

For fill I can see it, it is a one way that will not allow water to pour out while putting the cap on the bag, but what about on drain? how does it work there? Does it allow the pump to go onto the bag without water leaking out, how does the water flow the other way ( bag to pump to lake?)

I don't get it. It sound good and if it works both ways I am going to order two for my Vdrive sacs.

http://www.wakeside.com/product/boat...ing+adapter.do

[chpthril]

The cap on the left pushes the valve open when you stick the pump in, I think

They work, but real slow i've heard

[Timmy!]

Looks like the "male connector" is inserted into the female to open the valve. The male must go onto the end of the pump and as you pull it out, the valve closes...

(this was hard to write )