Rajul
I live in North Carolina were the humidity is at 98% all summer long. If I was to open a jug of glow fuel every time to swap the pump, the fuel would be ruined by the alcohol absorbing the moisture from the open air. Happens all the time here, so I keep the jugs sealed tite.

The pump you are showing, is it for gasoline or glow fuel?
Do you have a part number for that pump or a web site?

Most of the time you can't use one for the other as a gas pumps rubber seals will not hold up to the alcohol in our glow fuel. The alcohol will attack the seals.

Doug