Fire extinguisher mounting

[popotla]

I have a dry powder fire extinguisher, “stored pressure type”, 2kg.

Is there any preference as regards vertical or horizontal in-vehicle mounting, and if so, why, or doesn’t it matter?

[Tombie]

Just take it down once a month and give it a good shake so the powder doesnt compact

[rangieman]

Just take it down once a month and give it a good shake so the powder doesnt compact
It also pays to give the bottom a few taps with a rubber mallet;)

[Blknight.aus]

or bounce it off of a tyre....

vertically off of the spare if you stow it horizontally, horizontally off of a fitted tyre if you stow it vertically.

[CraigE]

Positioning does not really matter (though dont mount it upside down). The biggest things to remember when mounting is to pick somewhere easy to reach from inside and outside the car (reaching in), position it so that there is little likliehood of the pin comingout or being knocked out and once a month or so give it a bit of a shake to avoid settling.