On Sun, 15 Sep 2013 12:23:40 -0700 (PDT), Higgs Boson
wrote:

Mine is a very old Kidde, big red puppy; A.B.C. Indicator is still in the green,

I asked a local Fire Captain ( I know) about this. His answer was if
the gauge still shows green the FE was still good.

Do not tamper with the trigger.

One is not enough in a home.

Sample placements:

http://ruttsautotools.com/wp-content/uploads/2013/05/kidde-466141-kitchengarage-fire-extinguisher-10-bc-image-02.jpg