Hockey Club

I like it (2008-07-10)
It works best when you begin filling the small tanks from a "Full" large tank. The objective is to get the liquid in to the small tank not the vapors. I even use a small pair of pliers to bleed the small valve in the little tank so I know when the liquid is at the top. This adapter will also work to fill the small brazing fuel tanks.

Used properly it can be very useful and money saving... (2008-01-27)
For safety concerns just use the source tank valve for on/off control...To fill each 1 lb. bottle more completely simply put those containers in a refrigerator or even a freezer for a few minutes AND put the 20/40 lb. FULL tank in hot water and/or in the Sun...The key here is to maximize the pressure in the source tank and minimize it in the receiving 1 lb. bottle allowing for more propane to transfer before the pressure equalizes...I've been filling these little bottles for years using this type coupler and while they may not get 100% filled as when new they can reach 80-90% with regularity when the above steps are taken...Keep in mind NO Propane tank is completely filled anyway or at least it shouldn't be to allow for excessive heat expansion when full..

Even if trying to refill in a freezing or below environment simply heating the 20/40 lb. bottle up by leaving it in a heated indoors for a few hours and/or in hot water will help tremendously to get more transferred...

When you get tanks refilled commercially the source has pump assisted pressure so this always allows for a complete fill...

save your money (2008-01-02)
I bought and used this thing. Not only is it dangerous to use (no shut off) It only fills a one lb bottle, maybe half way with a full 20# can. save your money

Useful Emergency Item to Have (2007-11-12)
Useful Emergency Item to Have
This is one element of my emergency preparations here in Ohio.
My camping/emergency cooking burner, propane lantern and Buddy heater unit all work on the small canisters. This would allow me to make use of the propane in my two 20lb tanks in an emergency by letting me refill those small canisters.